Chemistry of phosphido-bridged dimolybdenum complexes. Part 4. Reactions of [Mo2(η5-C5H5)2(µ-H)(µ-PR2)(CO)4](R = Ph or Me) with dienes
- 1 January 1990
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 155-159
- https://doi.org/10.1039/dt9900000155
Abstract
The photochemical reactions of [Mo2(η5-C5H5)2(µ-H)(µ-PR2)(CO)4](R = Ph or Me) with allene, 1,3-butadiene, 2-methyl-1,3-butadiene, and 1,3-cyclohexadiene have been studied. In each of these reactions allyl complexes of general formula [Mo2(η5-C5H5)2(µ-PR2)(η3-allyl)(CO)3] are obtained as major products. The 1H n.m.r. spectra of these allyl complexes indicate that they exist in solution as an equilibrium mixture of exo and endo isomers. In the reactions with 1,3-butadiene the allyl complexes are accompanied by very low yields of other species which are assigned the formula [Mo2(η5-C5H5)2O(µ-vinyl)(µ-PR2)(CO)] on the basis of spectroscopic evidence. The reaction of [Mo2(η5-C5H5)2(µ-H)(µ-PMe2)(CO)4] with allene gives as a major product, in addition to the allyl species, the complex [Mo2(η5-C5H5)2{µ-σ:η2-C(Me)=CH2}(µ-PMe2)(CO)3].Keywords
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