A novel Cd complex with 3D framework containing perpendicular chains and helices

Abstract

The hydrothermal reaction of CdBr 2 · 2H 2O with a flexible multicarboxylate ligand, trans-aconitic acid (H 3L), produced a novel coordination compound [Cd 3L 2(H 2O) 6] n . It crystallizes in the space group C2/c with a = 17.1304(1) Å, b = 9.5611(2) Å, c = 14.0137(2) Å, β = 115.96°, Z = 4, V = 2063.65(5) Å 3. The unique feature of the structure is an unprecedented 3D framework containing infinite Cd(1)–O–C linear chains and heterochiral Cd(2)–O–C single-stranded helices. These linear chains and helices happen to be perpendicular to each other.