Copper(II) and cobalt(II) salt complexes with 2,6-dimethyl-3.5-pyridinedicarboxylic acid dihydrazide

Abstract

Complexes of 2,6 dimethyl 3,5 pyridinedicarboxylic acid dihydrazide (DH) with copper(II) and cobalt(II) nitrates and sulfates have been studied by IR and UV spectroscopy, DTA, and X ray crystallogra phy. The complexation results in polynuclear compounds of the {[M(DH)(ROH) n ]An m } z composition (M = Cu 2+ , Co 2+ ; An = ; R = H, i Pr; n = 0.5-4, m = 1.2, z ≥ 4) containing bidentate DH bridges coordinated to the metal through the carbonyl oxygen atom and the amino group nitrogen atom of the hydrazide moiety.

A copper(II) complex with pyridine-2,6-dicarboxylic acid: Synthesis, characterization, thermal decomposition, bioactivity and interactions with herring sperm DNA

“…The ring wagging vibration of the pyridine group is also observed in the 685 cm -1 region for the complex. The presence of weak band at 594 cm -1 can be assigned to the stretching vibration of the Cu-N bond [33]. The absorption peak at 436 cm -1 is from the stretching vibration of the Cu-O bond [34].…”

New Metal-Containing Poly(urethane-Semicarbazides) on the Basis of Pyridine Derivatives

“…The chain extender (DH) was synthesized by refluxing an alcohol solution of diethyl 2.6-dimethyl-3.5-piridinedicarboxylate with an excess of hydrazine hydrate as describe in [15]. Polyurethanes were prepared by a two-step procedure under an argon atmosphere.…”