Synthesis and structure characterization of two cadmium coordination polymers based on μ2-bridging bidentate hydrazine ligand

Abstract

Synthesis, single crystal structures, spectral and thermal characteristics of two cadmium coordination polymers, viz., [Cd(NO₃)₂(N₂H₄)₂] (1) [Cd(C₃H₂O₄)(N₂H₄)] (where C₃H₂O₄ is malonate) (2) are reported. The μ₂-bridging bidentate binding mode of the crystallographically unique hydrazine ligands in
(1) leads to a one-dimensional polymeric structure extending along c axis. The central Cd(II) in (2) exhibits hepta-coordination and is bonded to a unique malonate anion which exhibits a μ₃-bridging pentadentate coordination, extending the structure along the a axis. The bridging bidentate binding of the crystallographically independent hydrazine ligand extends along b axis resulting in a 2-D structure.