Coordination chemistry of acrylamide 1. Cobalt(II) chloride complexes with acrylamide - Synthesis and crystal structures

Abstract

The molecular structures of blue dichloro-tetrakis(acrylamide)cobalt(II), [Co{O-OC(NH2)CH=CH2}4Cl2] (1) and pink hexakis(acrylamide)cobalt(II) tetrachlorocobaltate(II), [Co{O-OC-(NH 2)CH=CH2}6][CoCl4] (2), characterized by single X-ray diffraction, IR spectroscopy and elemental analyses, are described. The coordination of CoII in 1 involves a tetragonally distorted octahedral structure with four O-donor atoms of acrylamide in the equatorial positions and two chloride ions in the apical positions. The second complex 2 in ionic form contains CoII cations surrounded by an octahedral array of O-coordinated acrylamide ligands, accompanied by a [CoCl4]2- anion. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.