Polymeric Bipositive Metal Ion Complexes of Terephthalaldehyde bis-(isonicotinic acid hydrazone)

Chemical Laboratories, University of Allahabad, Allahabad-211 002

Manuscript received 20 April 1981, revised 3 September 1981, accepted 5 November 1981

Terephthalaldehyde \(bis\)-(isonicotinic acid hydrazone) (TBINH) has been synthesized by the condensation of terephthalaldehyde and isonicotinic acid hydrazide. TBINH yields complexes, [MLX₂ .ϰH₂O]n [M=Mn(II), Co(ll), N₁(II), Zn(II), Cd(II), UO₂(VI); L=C₁₀ H₁₆,N₆O₂; X=CH₃COO^-, NO\(_3^-\) and ϰ=O, 1 or 2], on reftuxing a mixture of TBINH and metal salt in DMF medium in 1 : 1 ratio. Infrared and reflectance spectra, magnetic and thermogravimetric studies indicate that the complexes are polymeric having octahedral geometry. The order of thermal stability of the polymers is: Zn>Cd>Co>Mn> UO₂ >N₁.