Articles written in Journal of Chemical Sciences
Volume 114 Issue 1 February 2002 pp 25-36 Inorganic and Analytical
Some new coordination complexes of hydrazinium main group metal dipicolinate hydrates of formulae (N2H5)2M(dip)2.nH2O (where, M = Ca,Sr,BaorPb and
Volume 115 Issue 2 April 2003 pp 103-111
Some new hydrazinium 2-pyrazinecarboxylate and 2,3-pyrazinedi-carboxylate salts of the formulae N2H5pc, N2H5pc.H2O (Hpc = 2-pyrazinecarboxylic acid), N2H5Hpdc, (N2H5)2pdc.H2O and N2H5(Hpdc).H2pdc (H2pdc = 2,3-pyrazinedi-carboxylic acid) have been prepared by neutralization of aqueous hydrazine hydrate with the respective acids in appropriate molar ratios. The free acids and their hydrazinium salts have been characterized by analytical, IR spectroscopic and thermal studies. IR spectra of all the salts show N-N stretching frequencies of the N2H5+ ion in the region 975–960 cm-1. The thermoanalytical behaviour of the free acids and their salts has been investigated by simultaneous TG and DTA. While pyrazinecarboxylic acid shows single-step endothermic (229°C) complete decomposition, pyrazindi-carboxylic acid shows exothermic decarboxylation followed by identical endothermic decomposition as that of the former. Similarly, salts of the monocarboxylic acid show endothermic effects during pyrolysis, whereas salts of the dicarboxylic acid show endothermic followed by exothermic decomposition. The acids and their salts both undergo complete decomposition to gaseous products.
Volume 131 | Issue 10
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