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

[摘要]：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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