Thermal studies of Zn(II) hydrazine complexes in the solid state

Abstract

The synthesis and characterization of ZnL_nX₂ • mH₂O, where L = N₂H₄; n = 3, 2 and 1.5; X = Cl⁻, Br⁻ and 12SO²⁻₄; and m = 0 or 1, have been done and their thermal studies have been carried out using a Shimadzu DT-30 Thermal Analyzer. ZnL₃SO₄, ZnL_2.75SO₄, ZnL₂SO₄, ZnLCl₂ and ZnL_0.5Cl₂ have been synthesized pyrolytically in the solid state from their parent complexes synthesized from solution. Two varieties of ZnL₂Cl₂ synthesized by us are indistinguishable by IR spectroscopy but possess appreciable differences in their thermal profiles. Two forms of ZnL₃SO₄ which are also indistinguishable by IR spectroscopy show noticeable differences in their thermal profiles.