H. Masuda, T. Taga, H. Sugimoto
Oct 2, 1984
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0
Influential Citations
8
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The crystal structure of formylmethyl(tetraphenylporphinato)cobalt(III) has been determined by the X-ray method. The complex crystallizes in the monoclinic space group Pc with two molecules in a unit cell of dimensions; a 13.132(9), b 12.747(5), c 13.443(8) A, and β 129.83(4)°. The cobalt(III) ion is coordinated by the four porphinato nitrogen atoms and one carbon atom of the formylmethyl group, and is displaced by 0.14 A from the mean plane of the four porphinato nitrogen atoms towards the axial formylmethyl ligand. A formylmethyl group is σ-bonded to the cobalt ion with the bond parameters: CoC 1.976(7), CC 1.426(14), CO 1.216(10) A, and CoCC 109.4(7)°, and the average CoN bond distance is 1.969(29) A. The CCCoN torsion angle between the formylmethyl group and the porphyrin ring is 13.0°. The CoC bond formation was interpreted by the attractive force between the Co d π -orbital and the carbonyl carbon p π -orbital of the formylmethyl group.