Chromium(II) chemistry. Part 11. Further investigations of complexes of 2,2′-bipyridyl and 1,10-phenanthroline

Abstract

Various mono- and bis-(amine)halides and thiocyanates of Cr^II have been prepared. The complexes [Cr(bipy)X₂] and [Cr(phen)X₂](bipy = 2,2′-bipyridyl, phen = 1,10-phenanthroline, X = Cl or Br) are high spin but with considerable antiferromagnetic interaction due to halide bridging in octahedral structures, while [Cr(bipy)₂X₂](X = I or SCN) and [Cr(phen)₂] are low spin. Infrared data show that the thiocyanato-complexes have a cis-N-bonded configuration.