• C L Yadava

      Articles written in Journal of Chemical Sciences

    • Infrared spectral evidence for mono-, bi- and tetra-dentate behaviour of hexamethylenetetramine

      I S Ahuja Raghuvir Singh C L Yadava

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      Infrared spectral features to distinguish the different modes of hexamethylenetetramine in metal complexes have been presented. The tentative mode of metalhexamethylenetetramme bonding has been arrived at from the pattern of the twopcn bands at 1225 and 1000 cm−1. It is shown that in complexes with terminal monodentate, bidentate and tetradentate the bands show differing behaviour. Except for the splitting ofvcn bands the IR spectra are superimposable on that of the uncoordinated molecule supporting the theory that chair configuration of the uncoordinated hexamethylenetetramine is retained in all the complexes.

    • Some neutral three-coordinate complexes of mercury(II) halides and pseudohalides with N-methylnicotinamide

      I S Ahuja C L Yadava Shailendra Tripathi

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      Coordination compounds of mercury(II) chloride, bromide, cyanide and thiocyanate with N-methylnicotinamide, a potentially bidentate ligand, have been prepared. The complexesisolated have 1∶1 (metal:ligand)stoichiometry. Molecular weight measurements in molten camphor indicate that the mercury (II) chloride and bromide complexes are monomeric. Based on conductance values, molecular weight determinations and infrared spectral data, it is inferred that in the solid state in all these complexes the metal ion has a coordination number three and is bonded to the N-methylnicotinamide via its pyridine ring nitrogen, and is terminally bonded to the halogen/pseudohalogens.

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