An unusual example of a linearly coordinated acetone ligand in a six-coordinate iron(II) complex

Abstract

The title compound, acetonediaqua[2,6-bis(3-tert-butylpyrazol-1-yl) pyridine]iron(II) bis(tetrafluoroborate) acetone disolvate, [Fe(C 19H25N5)(C3H6O)(H 2O)2](BF4)2·2C 3H6O, contains a C2-symmetric six-coordinate complex dication, with an acetone ligand in its equatorial plane that is linearly coordinated by symmetry (Fe-O=CMe2 = 180°). This is a consequence of close steric contacts between the coordinated carbonyl group and the two distal fert-butyl substituents on the tridentate ligand. © 2006 International Union of Crystallography.