Comparison of the photochemistry of organometallic N-heterocyclic carbene and phosphine complexes of manganese

Reference:

Batool, M., Martin, T. A., Abu Naser, M., George, M. W., Macgregor, S. A., Mahon, M. F. and Whittlesey, M. K., 2011. Comparison of the photochemistry of organometallic N-heterocyclic carbene and phosphine complexes of manganese. Chemical Communications, 47 (40), pp. 11225-11227.

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Official URL:

http://dx.doi.org/10.1039/C1CC14467G

Abstract

Time-resolved IR (TRIR) studies on (eta(5)-C(5)H(4)Me)Mn(L)(CO) (L = 1,3-diethyl-4,5-dimethylimidazol-2-ylidene, PPh(3)) indicate that the rate of reaction with CO is ca. 10(2) slower for the N-heterocyclic carbene intermediate, which DFT calculations suggest is due to the presence of a strong Mn center dot center dot center dot H-C agostic bond. The reactivity of these intermediates in alkane solvents is governed by such interactions rather than solvent coordination to the unsaturated metal centre.

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