Crystal structures of two new six-coordinate iron(III) complexes with 1,2-bis(diphenyl-phosphane) ligands.

Structural characterization of the ionic complexes [FeCl(CHP)][FeCl]·0.59CHCl or [(dppen)FeCl][FeCl]·0.59CHCl (dppen = -1,2-bis-(di-phenyl-phosphane)ethyl-ene, PCH) and [FeCl(CHP)][FeCl]·CHCl or [(dpbz)FeCl][FeCl]·CHCl (dpbz = 1,2-bis-(di-phenyl-phosphane)benzene, PCH) demonstrates coordination of two bidentate phosphane ligands (bis-phosphanes) to a single iron(III) center, resulting in six-coordinate cationic complexes that are balanced in charge by tetra-chlorido-ferrate(III) monoanions.