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] (<strong>1</strong>) [Cd(C₃H₂O₄)(N₂H₄)] (where C₃H₂O₄is malonate) (<strong>2</strong>) are reported. The μ₂-bridging bidentate binding mode of the crystallographically unique hydrazine ligands in (<strong>1</strong>) leads to a one-dimensional polymeric structure extending along <em>c</em> axis. The central Cd(II) in (<strong>2</strong>) exhibits hepta-coordination and is bonded to a unique malonate anion which exhibits a μ₃-bridging pentadentate coordination, extending the structure along the <em>a</em> axis. The bridging bidentate binding of the crystallographically independent hydrazine ligand extends along <em>b</em> axis resulting in a 2-D structure.