Dr. Nanhai Singh

Retired Professor
Ph D (Awadh Univ.)
Contact Information:
Email Id: nsinghbhu@gmail.com ; nsingh@bhu.ac.in
Academic Qualifications:
 
S. No.DegreeInstitutionYear
1.B.ScBanaras Hindu University1972
2.M.ScBanaras Hindu University1974
3.Ph.DAwadh University1980

Area of Specialization: Our group is actively engaged in the design, synthesis, crystal structures and properties of dithio complexes of ligands such as functionalized dithiocarbamates, xanthates, dithiocarbimates, isomaleonitrile dithiolate and other related dithio ligands. The homo- and heteroleptic as well as the homo- and heterometallic complexes thus formed have shown exciting semiconducting and luminescent properties. Several pyridyl functionalized dithiocarbamate complexes have been used as sensitizers in dye sensitized solar cells (DSSCs) and have shown good conversion of light energy into electrical energy. Rare CH…M anagostic interactions have been investigated and supported by theoretical calculations particularly in d8 and d9 metal complexes.

 
Projects Undertaken as PI:

i. SERB: Design, synthesis, crystal structure and optical properties of metal complexes with functionalized sulfur based ligands. Project No. P-07 / 593; SERB No. SERB, SB/S1/IC-15/2014

ii. CSIR: Title: “Design, Synthesis, Properties and Exploration of Dithiocarbamate as Sensitizer in Solar Cell” Project No. P-25/341; CSIR No. 01(2679)/12/EMR-II

List of 10 major Publications: (in order of importance)

1. Intermolecular Tl…H-C anagostic interactions in luminescent pyridyl functionalized thallium (I) dithiocarbamates, V. Kumar, V. Singh, A. N. Gupta, M. G. B. Drew and N. Singh, Dalton Trans, 2015, 44, 1716.

2. Synthesis, crystal structures and photosensitizing activity of ferrocenyl bearing planar Ni(II) and Cu(II) dithiocarbamates with heteroaromatic substituents in dye sensitized TiO2solarcells,V. Singh, R. Chauhan, A. N. Gupta,V. Kumar, M. G. B. Drew, L. Bahadur and N. Singh, Dalton Trans, 2014, 43, 4752 .

3. Synthesis, structure and light harvesting properties of some new transition metal dithiocarbamates involving ferrocene., Kumar, R. Chauhan, K. C. Molloy, G. K. Köhn, L. Bahadur and N. Singh, Chem. Eur. J., 2010, 16, 4307.

4. Enhanced light harvesting efficiencies of bis(ferrocenylmethyl) based sulfur rich sensitizers used in dye sensitized TiO2 solar cells., S. K. Singh, R. Chauhan, B. Singh, K. Diwan, G. K. Köhn, L. Bahadur and N. Singh, Dalton Trans., 2012, 41, 1373.

5. Facile in situ copper(II) mediated C-S bond activation transforming dithiocarbimate to carbamate and thiocarbamate generating Cu(II) and Cu(I)complexes, K. Diwan, B. Singh, S. K. Singh, M. G. B. Drew and N. Singh, Dalton Trans., 2012, 41, 367.

6. Efficient phenylmercury(II) methylferrocenyldithiocarbamates functionalized dye sensitized solar cells., V. Singh, R. Chauhan, A. Kumar, L. Bahadur and N. Singh, Dalton Trans., 2010, 39, 9779.

7. Synthesis, crystal, photoluminescence and electrochemical investigations of some new phenylmercury(II) dithiocarbamate complexes involving ferrocene. N. Singh, A. Kumar, R. Prasad and K. C. Molloy, Dalton Trans., 2010, 39, 2667.

8. Unprecedented coordination of dithiocarbimate in multinuclear and heteroleptic complexes. B. Singh, M. G. B. Drew, G. K. Kohn. K. C. Molloy and N. Singh, Dalton Trans., 2011, 40, 623

9. Synthesis, crystal and molecular structures and properties of some new phenyl mercury(II) dithiolate complexes. N. Singh, A. Kumar, K.C. Molloy and M. F. Mahon, Dalton Trans., 2008, 4999.

10. Intermolecular anagostic interactions in group 10 metal dithiocarbamates, N. Gupta, V. Kumar, V. Singh, M. G. B. Drew and N. Singh, CrystEngComm, 16, 2014, 6765

Full List of Publications:

1. Impact of ligand framework on the crystal structures and luminescent properties of Cu(I) and Ag(I) clusters and a coordination polymer derived from thiolate/iodide and dppm ligands, G. Rajput, M. K. Yadav, M. G. B. Drew and N. Singh , Inorg. Chem., 2015, under revision

2. Influence of the ligand frameworks on the coordination environment and properties of new phenylmercury(II) β-oxodithioester complexes, G. Rajput, M. K. Yadav, M. G. B. Drew and N. Singh, Dalton Trans., 2015, under revision

3. Cooperative influence of ligand frameworks in sustaining supramolecular architectures of Ni(II)/Pd(II) heteroleptic dithio-dipyrrin complexes via non-covalent interactions, V. Kumar, V. Singh, A. N. Gupta, S. K. Singh, M.G.B. Drew, N. Singh, Polyhedron, 2015, (accepted for publication)

4. Intermolecular Tl…H-C anagostic interactions in luminescent pyridyl functionalized thallium (I) dithiocarbamates, V. Kumar, V. Singh, A. N. Gupta, M. G. B. Drew, N. Singh , Dalton Trans., 44, 2015, 1716.

5. Influence of ligand environment on the structure and properties of silver(I) dithiocarbamate cluster-based coordination polymers and dimmers, V. Kumar, V. Singh, A. N. Gupta, K. K. Manar, , L. B. Prasad, M. G. B. Drew, N. Singh , New J. Chem., 38, 2014, 4478.

6. A new fluorescent pyrene–pyridine dithiocarbamate probe: A chemodosimeter to detect Hg2+ in pure aqueous medium and in live cells, V. Singh, P. Srivastava, S. P. Verma, A. Misra, P. Das and N. Singh , J. Lumin., 154, 2014, 502.

7. Effect of pyridyl substituents leading to the formation of green luminescent mercury(II) coordination polymers, zinc(II) dimers and a monomer, , V. Singh, V. Kumar, A. N. Gupta, M. G. B. Drew and N. Singh , New J. Chem., 38, 2014, 3737.

8. Intermolecular anagostic interactions in group 10 metal dithiocarbamates., A. N. Gupta, V. Kumar, V. Singh, K. K. Manar, M. G. B. Drew and N. Singh, CrystEngComm, 16, 2014, 9299.

9. Influence of ligand environments on the structures and luminescence properties of homoleptic cadmium(II) pyridyl functionalized dithiocarbamates, V. Kumar, V. Singh, A. N. Gupta, K. K. Manar, M. G. B. Drew, N. Singh, CrystEngComm, 16, 2014, 6765.

10. Synthesis, crystal structures and photosensitizing activity of ferrocenyl bearing planar Ni(II) and Cu(II) dithiocarbamates with heteroaromatic substituents in dye sensitized TiO2 solar cells , V. Singh, R. Chauhan, A. N. Gupta, V. Kumar, M. G. B. Drew and N. Singh, Dalton Trans., 43, 2014, 4752.

11. Syntheses, crystal structures and optical properties of heteroleptic copper(I) dithio/PPh3 complexes., A. N. Gupta, V. Singh, V. Kumar, L. B. Prasad, M. G. B. Drew and N. Singh, Polyhedron, 79, 2014, 324.

12. M. K. Yadav, G. Rajput, A. N. Gupta, V. Kumar, M. G. B. Drew and N. Singh, Exploring the coordinative behaviour and molecular architecture of new PhHg(II)/Hg(II) dithiocarbamate complexes, Inorg. Chim. Acta, 421, 2014, 210.

13. Versatile coordination environment and interplay of metal assisted secondary interactions in the organization of supramolecular motifs in new Hg(II)/PhHg(II) dithiolates, G. Rajput, M. K. Yadav, T. S. Thakur, M. G. B. Drew and N. Singh, Polyhedron, 69, 2014, 225.

14. Light harvesting properties of some new heteroleptic dithiocarbamate-diamine/diimine complexes of Ni, Pd and Pt studied as photosensitizer in dye-sensitized TiO2 solar cells , R. Chauhan, S. K. Singh, B. Singh, M. G. B. Drew, L. Bahadur and N. Singh K. Diwan , New J. Chem., 2014, 38, 97.

15. Conducting properties of new heterometallic one-dimensional coordination polymers derived from 1-nitroethylene-2, 2-dithiolate (NED2−) ligand and their I2-doped products , V. Singh, A. Kumar, M. K. Yadav, L. B. Prasad and N. Singh , Synth. Met., 2013, 176, 65.

16. Self assembly of homoleptic Ni(II) dithiocarbamates- and dithiocarbimates via Ni∙∙∙H−C anagostic and C−H∙∙∙π(chelate) interactions , S. K. Singh, M. G. B. Drew and N. Singh , CrystEngComm, 2013, 15, 10255.

17. Syntheses, crystal structures and conducting properties of new homoleptic copper (II) dithiocarbamate complexes , A. N. Gupta, V. Singh, V. Kumar, A. Rajput, L. Singh, M. G. B. Drew and N. Singh , Inorg. Chim. Acta, 2013, 408, 145.

18. Synthesis and structural characterization of new heteroleptic 1, 1’-bis(diphenylphosphino)ferrocene dithio complexes of Ni, Pd and Pt: Their uses as sensitizers in TiO2 dye sensitized solar cells , S. K. Singh, R. Chauhan, K. Diwan, M. G. B. Drew, L. Bahadur and N. Singh , J. Organomet. Chem., 2013, 745-746, 190.

19. Syntheses, crystal structures and photoluminescent properties of new heteroleptic Ni(II) and Pd(II) complexes of ferrocene functionalized dithiocarbamate-and dipyrromethene ligands S. K. Singh, V. Kumar, M. G. B. Drew and N. Singh , Inorg. Chem. Commun., 2013, 37, 151.

20. Unusual C–H∙∙∙Ni anagostic interactions in new homoleptic Ni(II) dithio complexes , G. Rajput, V. Singh, A. N. Gupta, M. K. Yadav, V. Kumar, S. K Singh, A. Prasad, M. G. B. Drew and N. Singh , CrystEngComm, 2013, 15, 4676.

21. Versatile coordination environment and interplay of metal assisted secondary interactions in the organization of supramolecular motifs in new Hg(II)/PhHg(II) dithiolates G. Rajput , M. K. Yadav, T. S. Thakur , M. G.B. Drew and N. Singh Polyhedron, 2014, 69, 225–233.

22. Light harvesting properties of some new heteroleptic dithiocarbamate-diamine/diimine complexes of Ni, Pd and Pt studied as photosensitizer in dye-sensitized TiO2 solar cells K. Diwan, R. Chauhan, S. K. Singh, B. Singh, M. G. B. Drew, L. Bahadur and N Singh New J. Chem., 2014, 38, 97.

23. Conducting properties of new heterometallic one-dimensional coordination polymers derived from 1-nitroethylene-2, 2-dithiolate (NED2−) ligand and their I2-doped products V. Singh, A. Kumar, M. K. Yadav, L. B. Prasad and N. Singh , Synth. Met., 2013, 176, 65– 69.

24. Self assembly of homoleptic Ni(II) dithiocarbamates- and dithiocarbimates via Ni∙∙∙H−C anagostic and CH π(chelate)interactions, S. K. Singh, M. G. B. Drew and N. Singh CrystEngComm, 2013, 15, 10255-10265.

25. Syntheses, crystal structures and conducting properties of new homoleptic copper (II) dithiocarbamate complexes, A. N. Gupta, V. Singh, V. Kumar, A. Rajput, L. Singh, M. G. B. Drew and N. Singh Inorg. Chim. Acta, 2013, 408, 145–151.

26. Synthesis and structural characterization of new heteroleptic 1, 1’-bis(diphenylphosphino)ferrocene dithio complexes of Ni, Pd and Pt: Their uses as sensitizers in TiO2 dye sensitized solar cells S. K. Singh, R. Chauhan, K. Diwan, M. G. B. Drew, L. Bahadur and N. Singh J. Organomet. Chem., 2013, 745-746, 190-200.

27. Syntheses, crystal structures and photoluminescent properties of new heteroleptic Ni(II) and Pd(II) complexes of ferrocene functionalized dithiocarbamate-and dipyrromethene ligands S. K. Singh, V. Kumar, M. G. B. Drew and N. Singh Inorg. Chem. Commun., 2013, 37, 151–154.

28. Unusual C–H∙∙∙Ni anagostic interactions in new homoleptic Ni(II) dithio complexes G. Rajput, V. Singh, A. N. Gupta, M. K. Yadav, V. Kumar, S. K Singh, A. Prasad, M. G. B. Drew and N. Singh, CrystEngComm, 2013, 15, 4676-4683.

29. Cooperative metal–ligand-induced properties of heteroleptic copper(I) xanthate/ dithiocarbamate PPh3 complexes G. Rajput, V. Singh, S. K. Singh, L. B. Prasad, M. G. B. Drew and N. Singh Eur. J. Inorg. Chem., 2012, 3885–3891.

30. Facile in situ copper(II) mediated C-S bond activation transforming dithiocarbimate to carbamate and thiocarbamate generating Cu(II) and Cu(I) complexes K. Diwan, B. Singh, S. K. Singh, M. G. B. Drew and N. Singh, Dalton Trans., 2012, 41, 367-369.

31. Enhanced light harvesting efficiencies of bis(ferrocenylmethyl) based sulfur rich sensitizers used in dye sensitized TiO2 solar cells, S. K. Singh, R. Chauhan, B. Singh, K. Diwan, G. K. Köhn, L. Bahadur and N. Singh, Dalton Trans., 2012, 41, 1373-1380.

32. The interplay of secondary Hg∙∙∙S, Hg∙∙∙N and Hg∙∙∙π bonding interactions in supramolecular structures of phenylmercury(II) dithiocarbamates , V. Singh, A. Kumar, R. Prasad, G. Rajput, M. G. B. Drew and N. Singh, CrystEnggComm., 2011, 13, 6817-6826.

33. Polyoxomolybdate (VI) anion stabilized by ammonium cation via CS2 elimination from N-benzylmethylferrocenydithiocarbamate, A. Kumar, V. Singh, A. N. Gupta, M. K. Yadav, V. Kumar and N. Singh, J. Coord. Chem., 2012, 65, 431-438.

34. Monometallic salts derived from complex anions of group 10 metal ions with p- tolylsulfonyldithiocarbimate ligand: Synthesis, characterization and properties S.K.Singh,K.Diwan, M.G.B.Drew and N. Singh, Inorg. Chim. Acta., 2012, 384, 176–183.

35. Preparation, characterization and conducting properties of chalcogenocynato based complex bimetallic salts and their I2-doped products, K. Diwan and N. Singh Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal , Chemistry, 2012, 42, 656–662.

36. Efficient phenylmercury(II) methylferrocenyldithiocarbamates functionalized dye sensitized solar cells V. Singh, R. Chauhan, A. Kumar, L. Bahadur and N. Singh Dalton Trans., 2010, 39, 9779-9788.

37. Unprecedented coordination of dithiocarbimate in multinuclear and heteroleptic complexes B. Singh, M. G. B. Drew, G. K. Köhn, K. C. Molloy and N. Singh, Dalton Trans., 2011, 40, 623-631.

38. Synthesis, structure and light harvesting properties of some new metal dithiocarbamate involving ferrocene, A. Kumar, R. Chauhan, K. C. Molloy, G. K. Köhn, L. Bahadur and N. Singh Chem. Eur. J., 2010, 16, 4307-4314.

39. Synthesis, crystal, photoluminescence and electrochemical investigations of some new phenylmercury(II) dithiocarbamate complexes involving ferrocene ,N. Singh, A. Kumar, R. Prasad and K. C. Molloy, Dalton Trans., 2010, 39, 2667-2695.

40. Supramolecular assemblies of metal ions in complex bimetallic and trimetallic salts based on hexacyanoferrate(III)ion, N. Singh, K. Diwan and M. G. B. Drew Polyhedron, 2010, 29, 3192-3197.

41. Synthesis, X-ray crystal structures and properties of complex salts andsterically Crowded heteroleptic complexes of group10 metal ions with aromaticsulphonyl dithiocarbimates and triphenylphosphine ligand, N. Singh, B. Singh, K. Thapliyal and M. G. B. Drew, Inorg. Chim. Acta, 2010, 363, 3589-3596.

42. Synthesis, crystal structures and properties of sterically congested heteroleptic complexes of group 10 metal ions with p-tolyl sulphonyl dithiocarbimate and 1,2- bis (diphenylphosphino)ethane, N. Singh, B. Singh, S. K. Singh and M. G. B. Drew Inorg,Chem.Commun., 2010, 13, 1451-1454.

43. Synthesis,structure, conductivity and calculated nonlinear optical properties of two novel bis (triphenylphosphane) copper (I) dithiocarbamates , A.Kumar, H. M. Figgie, W. S. Sheldrick and N. Singh, Eur. J. Inorg. Chem., 2009, 2720.

44. Synthesis, structure and calculated NLO properties of [(n-Bu)2Sn-µ-O-µ- OH Sn(n- Bu)2 (CH3CO2)]2 and its putative derivatives , A. Kumar, R. Prasad, G. Kociok-Kohn, K. C. Molloy and N. Singh Inorg. Chem. Commun., 2009, 12, 686-690.

45. Benzothiazole-2-thiolato bridged heterometallic coordination polymers and their I2- doped products : preparation, characterization and conducting propertiesN. Singh, A. Prasad and R. K. Singh Bull. Chem. Soc. Jpn., 2009, 82, 81-85.

46. Synthesis, crystal and molecular structures and properties of some new phenyl mercury(II) dithiolate complexes, N. Singh, A. Kumar, K. C. Molloy and M. F. Mahon Dalton Trans., 2008, 4999-5007.

47. Organoheterobimetallic cyanodithiocarbonates and their I2- doped products: Synthesis, characterization and conducting properties, N. Singh and A. Kumar Synth. Met., 2008, 158, 442-446.

48. Synthesis, characterization and conducting properties of heterobimetallic salts of cyanoiminomethanedithiolate ligand, N. Singh and B. Singh Bull. Chem. Soc., 2008, 81, 262.

49. Synthesis, characterization and electrical conductivities of mixed-ligand (N/S/Se)heterobimetallic coordination polymers and their I2-doped products, N. Singh and A. Prasad , Ind. J. Chem., 2008, 47A, 650-656.

50. Monoclinic modification of 1,1,3,3,5,5- hexamethyl –cyanomethyl-cyclo- 1,3,5- tristannathiane N. Singh, A. Kumar, K. C. Molloy and G. K. Köhn, ActaCryst., 2008, E64, m115.

51. Synthesis, characterization and conducting properties of complex salts and heterobimetallic coordination polymers of cyanodithioimidocarbonato ligands. N. Singh, A. Prasad and R. K. Sinha. Inorg.Chem.Commun., 2006, 9, 1058-1062.

52. Synthesis and Characterization of a complex salt and Heterobimetallic Coordination Polymers of 1-benzoyl-1-cyanoethylene-2,2-dithiolate, N. Singh, A. Prasad and S. Gupta Transition Met. Chem., 2005, 30, 383-388.

53. New heterometallic Coordination polymers derived from chalcogenocyanates : Synthesis, Characterization and Electrical Properties, N. Singh and R. K. Sinha. Transition Met. Chem., 2004, 29, 812-820.

54. Preparation, characterization and electrical conductances of heterometallic coordination polymers and complex bimetallic salts derived from isomaleonitriledithiolate, N. Singh, Sunita Gupta and R. K. Sinha, Inorg. Chem. Commun., 2003, 6, 416-422.

55. Preparation, characterization and molecular electrical conductivity of an ion- pair complex and mixed-metallic coordination polymers derived from maleonitriledithiolate N. Singh and R. K. Sinha, Inorg. Chem. Commun., 2003, 6, 97-101.

56. Synthesis, characterization and electrical conductivity of mixed- ligand heterobimetallic coordination polymers , N. Singh and R. K. Sinha , Inorg. Chem. Commun., 2002, 5, 255-258

57. Synthesis and molecular electrical conductivity of heterobimetallics derived from 1- ethoxycarbonyl-1-cyanoethylene-2,2-dithiolatozincate (II) ions. Part VI N. Singh and S. Gupta Synth. React. Inorg. Met.-Org. Chem., 2002, 32, 189-202.

58. Preparation, characterization and electrical conductivity of new heterobimetallic chalcogenates and their 1, 10-phenanthroline adducts, N. Singh and V.K. Singh, Transition Met. Chem., 2002, 27, 359-365.

59. Mixed-ligand complexes of cobalt(II) and nickel(II) with 2- sulfanylbenzothiazolate and (N,N) chelating ligands , N. Singh and S. Gupta, Ind. J. Chem. 2002, 41A, 771-773.

60. Preparation, characterization and electrical conductivity of heterometallic complexes derived from 2-sulfanylbenzothiazolat, N. Singh and R.K. Sinha, Inorg. Chem. Commun., 2001, 4, 454-458.

61. Synthesis and electrical properties of some new heterobimetallic coordination polymers MPb(SCN)4 (M = Co, Ni) and their reaction products with Lewis bases , N. Singh and V.K. Singh , Synth. React. Inorg. Met.-Org. Chem., 2001, 31, 1743-1757.

62. Preparation and electrical conductivity of organoheterobimtallic maleonitriledithiolates N. Singh and V.K. Singh , Transition Met. Chem., 2001, 26, 435-439.

63. Complex salts and heterobimetallic complexes derived form bis-(1- ethoxycarbonyl)- 1- cyanoethylen-2,2-dithiolatometalate(II) ions: Synthesis and properties, N. Singh and Sunita Gupta , Inorg. Chem. Commun., 2000, 3, 446-451.

64. Organoheterobimetallic complexes derived form bis(1-ethoxycarbony1)-1- cyanoethylene-2,2-dithiolatometalate (II) ion: Synthesis and properties , N. Singh and S.K. Rai. , J. Organomet. Chem., 2000, 605, 102-108.

65. Magnetic and electrical properties of new inorganic complex based materials derived from bis (1-ethoxycarbonyl-1-cyanoethylene-2,2-dithiolato)metalate (II) ions , N. Singh and Sunita Gupta. International J. Inorg. Materials, 2000, 2, 427-435.

66. Electrical properties of complex bimetallic salts [M(N-N)3]2+[Cu(MNT)2]2- and heterobimetallic AgI-CuII/HgII/CuII bis(maleonitriledithiolato) bridged coordination polymers , N. Singh and V.K. Singh. International J. Inorg. Materials, 2000, 2, 167-175.

67. Solid state electrical conductance and spectroscopic investigation of newly prepared complex bimetallic salts based on tris(isomaleonitriledithiolato)dioxourante(VI) ion. Part V, N. Singh and Sunita Gupta., Synth. React. Inorg. Met. Org. Chem., 2000, 30, 1429-1447.

68. Preparation, Spectroscopic Investivation and Antibacterial Activity of Some Organomercury(II) and Organotin(IV) Dithio Complexes , N. Singh, Sushmita Gupta and G. Nath. Appl. Organomet. Chem., 2000, 14, 484-492.

69. Spectroscopic and conducting properties of some heterobimetallic complexes formed with 1- ethoxycarbonyl-1-cyanoethylene-2,2-dithiolate. IV, N. Singh and S.K. Rai , Synth. React. Inorg. Met.-Org. Chem., 2000, 30, 281-305.

70. Electrical conductivity and molecular properties of organodithiohetero- bimetallics [PhHg]2[M(dithio)2]{M=Ni, Cu or Zn; dithioisomaleonitriledithiolate (i-MNT2-); 1,1- dicarboethoxy-2,2- ethylenedithiolate (DED2-) or trithiocarbonate (CS32-)} N. Singh and S. Gupta., Synth. Met., 2000, 110, 207-212.

71. Complex heterobimetallic salts derived from 1-ethoxycarbonyl-1-cyanoethylene-2,2-dithiolato dioxouranate(VI) ion: Preparation and properties, N. Singh and S. Gupta. , Indian J. Chem., 1999, 38A, 997-1009.

72. Solid state electrical conductance properties of some new bimetallic salts and heterometallic coordination polymers derived from bis(1-ethoxycarbonyl-1- cyanoethylene-2,2-dithiolato) cuprate(II) ion , N. Singh and S. Gupta. Synth. Met., 1999, 107, 167-174.

73. Complex salt and heterobimetallic complexes derived from bis(1- ethoxycarbonyl- 1-cyanoethylene-2,2-dithiolato) diargentate(I) ion: preparation, spectroscopic investigation and electrical conductance properties , N. Singh and S. Gupta. Polyhedron, 1999, 18, 1265-1271.

74. Semiconducting properties of some newly synthesized mixed metal, mixed- ligand complexes. Part III , N. Singh and L. B. Prasad , Synth. React. Inorg. Met-org. Chem, 1998, 28, 929-946.

75. Synthesis of isomaleonitrile dithioalto bridged heterobimetallic complexes, M[Pb(i-MNT)2], and their conductance behaviour, N. Singh and L. B. Prasad. Indian J. Chem., 1998, 37A, 169-172.

76. Preparation, spectroscopic characterization and solid state electrical conductance of the complex bimetallic salts of the type [M(L-L)3]2+[M(MNT)2]2-. Pat II N. Singh and L.B. Prasad., Synth. React. Inorg. Met-Org. Chem., 1996, 26, 627-646.

77. Preparation, spectroscopic characterization and solid state electrical conductance of bimetallic salts of the type [M(L-L)3]2+[M-(DED)2]2- N. Singh, L.B. Prasad and R. Verma, Synth. React. Inorg. Met-Org. Chem., 1995, 25, 915-929.

78. Synthesis and structural characterization of bimetallic salts containing octahedrally coordinated complex cations [M(L-L)3]2+ and planar complex anion [Ni(CS3)2]2-, N. Singh and R. Verma, Indian J. Chem., 1993, 32A, 639-640

79. Synthesis and spectral characterization of dithiophosphato bridged heterobimetallic complexes , N. Singh, R. Verma and N.K. Singh. Indian J. Chem., 1993, 32A, 151-153.

80. Formation and spectroscopic characterization of heterobiometallic complexes containing six-coordinate iron(IV) or manganese (IV) complex anion of 1,1-dicarboethoxy-2,2-ethylene dithiolate and octahedrally coordinated complex cations of iron(II), cobalt(II), nickel(II) or zinc(II) with1,10- phenanthroline , N. Singh, R.Verma and N. K. Singh. Polyhedron, 1991, 10, 1803-1808.

81. Studies on some dithiocarbamato bridged heterobimetallic complexes, part II , N. K. Singh, C. Kaw and N. Singh, Bull. Chem. Soc. Jpn., 1991, 64, 1440-1442.

82. Studies on isomaleonitriledithiolato bridged heterobimetallic complexes N. K. Singh, P. P. Agrawal and N. Singh , Synth. React. Inorg. Met.-Org. Chem., 1991, 21, 541-551.

83. Phenylmercury dithio complexes as ligands: Preparation and spectroscopic characterization of heterobiometallic complexes obtained from bis dithiocomplexes of Ni(II), Pd(II) and Pt(II) as Lewis acids, N. Singh, N. K. Singh and C. Kaw , Bull. Chem. Soc. Jpn., 1990, 63, 1801-1806.

84. Preparation and spectroscopic characterization of some heterobimetallic complexes of 1,1-dicarboethoxy-2,2-ethylene dithiolate involving divalent and monovalent metal ions, N. Singh, R. Verma and N. K. Singh, Polyhedron, 1990, 9, 1441-1445.

85. Formation and spectral properties of some mixed metal-oxouranium(VI) complexes with 1,1-dicarboethoxy-2,2-ethylenedithiolate, N. Singh, R. Verma and N. K. Singh, Synth. React. Inorg. Met.Org Chem., 1990, 20, 743-756.

86. 1,1-Dithiolato-bridged heterobimetallic complexes containing a transition metal ion and oxouranium(VI) , N. Singh, N. K. Singh and P. P. Agrawal. Transition Met. Chem., 1990, 15, 325-327.

87. Synthetic and spectroscopic studies of xanthato-bridged heterobimetallic complexes containing diamagnetic and paramagnetic metal ions , N. Singh, N. K. Singh and C. Kaw, Bull. Chem. Soc. Jpn., 1989, 62, 3328-3333.

88. Synthetic and spectroscopic studies on heterbimetallic tetrakisxanthates, R. C. Agrawal, N. Singh and S. Singh, J. Indian Chem. Soc., 1986, 63, 998-999.

89. Preparative and structural studies on some new heterobimetallic bis (trithiocarbonates) R.C. Agrawal, N. Singh and S. Singh, Synth. React. Inorg. Met.-Org. Chem., 1986, 16, 155-167.

90. Preparation and characterization of heterobimetallic tetraxanthates and their complexes with Lewis bases, R. C. Aggrawal, N. Singh and S. Singh, Polyhedron, 1985, 4, 343-348.

91. Synthesis and structural studies on bimetallic tetraxanthates and their complexes with some oxygen, nitrogen and phosphorus donors , R. C. Aggrawal, N. Singh and S. Singh, Indian J. Chem., 1983, 22A, 161-162.

92. Synthesis and structural studies on bimetallic tetraxanthates and their complexes with pyridine,2,2-bipyridyl and 1,10-phenanthroline, R. C. Aggrawal, N. Singh and S. Singh, Indian J. Chem., 1982, 21A, 268-271.

93. Synthesis and structural studies of Co[Ag(SCN.SeCN)]2 and its complexes with Lewis bases, P. P. Singh, D. D. S. Yadav and N. Singh, J. Inorg. Nucl. Chem., 1981, 43, 69-75.

94. Synthesis and structure of Pb[(EtOH)2NiHg(SeCN)4(SCN)2] and its complexes, P. P. Singh, N. Singh and D. D. S. Yadav, J. Inorg. Nucl. Chem., 1981, 43, 77-83.

95. Trimetallic hexaselenocyanates and their complexes, P. P. Singh, N. Singh and R. C. Verma, J. Less-Common Metals, 1980, 70, 143-153.

96. Synthesis and structure of Co[Tl(SCN)2]2 and its derivatives, P. P. Singh, N. Singh and R. C. Verma, J. Less-Common Metals, 1980, 70, 155-166.

97. Lead diisothiocyanatobis-m-selenocyanato dithiocyanatocobaltate(II) mercurate(II) and its pyridine,2,2-bipyridyl and 1,10-phenanthroline, P. P. Singh and N. Singh, J. Mol. Struct., 1979, 54, 207-219.

98. Lead diisothiocyanato bis-m-thiocyanatodithiocyanatocobaltate(II) mercurate(II) and its complexes , P. P. Singh and N. Singh J. Coord. Chem., 1979, 9, 197-204.