Alkali Metal and Ammonium Dif'Luoromono(Isonicotinoylhydrazinato)Cuprate(II) Trihydrate

Abstract

Alkali metal and ammonium difluoromono(isonicotinoylhydrazinato)cuprate(II) trihydrates, M[CuF₂(pyinhH)].3H₂O (where M. = Li, Na, K, Rb and NH₄ pyinhH₂ = isonicotinoylhydrazine), have been synthesized and characterized. The complexes have anomalously low μ_eff values suggesting weak Cu-Cu interaction. ESR evidence suggests that all complexes have weakly interacting electrons in the d_x2-y2 orbital. IR data suggest bonding of mononegative isonicotinoylhdrazine through the enolate oxygen atom and primary nitrogen atom, and terminal and bridging fluoride groups. All complexes are suggested to have square-pyramidal stereochemistry.