K. Yamashita, S. Tazawa, K. Sugiura
2016
Citations
0
Influential Citations
8
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract Oxo(porphyrinato)vanadium(IV), the oxovanadium [V IV O] 2+ complex of unsubstituted porphyrin, was prepared and structurally characterized. Our synthetic method enabled us to obtain 1 in sufficient quantity. The paramagnetic complex was characterized by IR and mass spectroscopic measurements. The IR spectrum contained a strong absorption at 994 cm −1 (in KBr matrix) attributable to the V O stretching mode. Single-crystal diffraction study revealed that 1 was a pot lid shaped molecule, i.e. , 1 exhibited a five-coordinate pseudo -square pyramidal geometry at the vanadium center. Vanadium was located above the porphyrin mean plane with a distance of 0.537(1) A, and an oxygen atom was coordinated perpendicularly with a bond distance of 1.599(2) A. The ligation of electropositive [V IV O] 2+ induced a partial negative charge on N and a positive charge on vanadium. The resultant polarization induced an electrostatic attractive interaction, affording a dimer in the solid state with a very short interplanar distance of 3.269(2) A. This dimer unit was packed in a herringbone manner.