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Issue 5, 2003
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Low valent carbonylvanadium complexes of the triphosphorus macrocycle 12[ane]P3Et3

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Abstract

The triphosphorus macrocycle 1,5,9-triethyl-1,5,9-triphosphacyclododecane, 12[ane]P3Et3, reacts with [V(CO)6] under photolytic conditions to produce fac-[(12[ane]P3Et3)V(CO)3] (1) which has been isolated as its Et4N salt. This can be oxidised to the neutral 17 electron complex fac-(12[ane]P3Et3)V(CO)3 (2), which has been characterised by EPR spectroscopy. Density functional calculations support the spectroscopic observations and give insight into the bonding. The V(0) compound cannot be further oxidised, but the macrocycle reacts with CpV(CO)4 thermally or photolytically to produce cis-[(η2-12[ane]P3Et3)V(η5-Cp)(CO)2] (3). The diamagnetic compounds have been characterised by IR and multinuclear (1H, 13C, 31P and 51V) NMR spectroscopy.

Graphical abstract: Low valent carbonylvanadium complexes of the triphosphorus macrocycle 12[ane]P3Et3

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Article information


Submitted
11 Nov 2002
Accepted
03 Jan 2003
First published
03 Feb 2003

Dalton Trans., 2003, 944-948
Article type
Paper

Low valent carbonylvanadium complexes of the triphosphorus macrocycle 12[ane]P3Et3

R. J. Baker, P. G. Edwards, R. D. Farley, D. M. Murphy, J. A. Platts and K. E. Voss, Dalton Trans., 2003, 944
DOI: 10.1039/B211105P

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