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

The title compound, acetonediaqua[2,6‐bis(3‐ tert ‐butylpyrazol‐1‐yl)pyridine]iron(II) bis(tetrafluoroborate) acetone disolvate, [Fe(C 19 H 25 N 5 )(C 3 H 6 O)(H 2 O) 2 ](BF 4 ) 2 ·2C 3 H 6 O, contains a C 2 ‐symmetric six‐coordinate complex dication, with an acetone ligand in its equatorial plane that is linearly coordinated by symmetry (Fe—O=CMe 2 = 180°). This is a consequence of close steric contacts between the coordinated carbonyl group and the two distal tert ‐butyl substituents on the tridentate ligand.