Crystal structure of catena-poly[[cadmium(II)-di-μ2-bromido-μ2-l-proline-κ2O:O′] monohydrate]

Abstract

In the title coordination polymer, {[CdBr2(C5H9NO2)]·H2O}n, the CdII ion is coordinated by four bromido ligands and two carboxylate oxygen atoms of two symmetry-related proline ligands, which exist in a zwitterionic form, in a distorted octahedral geometry. There is an intramolecular N—H...O hydrogen bond between the amino group and the carboxylate fragment. Each coordinating ligand bridges two CdII atoms, thus forming polymeric chains running along the c-axis direction. The water molecules of crystallization serve as donors for the weak intermolecular O—H...O and O—H...Br hydrogen bonds that link adjacent polymeric chains, thus forming a three-dimensional structure. N—H...O and N—H...Br hydrogen bonds also occur.

Keywords

• crystal structure
• L-proline cadmium bromide
• cadmium coordination polymer
• N/O—H...Br/O hydrogen bonds
• distorted octahedral geometry.