Why magnesium is five-coordinate in methanol(phthalocyaninato)magnesium(II).
The square-pyramidal Mg center in the title compound, [Mg(C(32)H(16)N(8))(CH(4)O)], is five-coordinate due to the formation of back-to-back pi-pi dimers that saturate the vacant apical site of the metal coordination sphere. Each complex is a member of a back-to-back and a face-to-face dimer; the latter are tethered by two strong O-H...N hydrogen bonds. The dimers form columns that likely determine the solid-state packing. The phthalocyaninate ligands are essentially planar, with a slight 'hat visor' conformation character.
Guzei
Ilia A
IA
Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA. iguzei@chem.wisc.edu
McGaff
Robert W
RW
Kieler
Heidi M
HM