Chemistry of phosphido-bridged dimolybdenum complexes. Part 1. High-yield synthesis of [Mo2(η5-C5H5)2(µ-H)(µ-PPh2)(CO)4] and its reactions with organophosphorus ligands: X-ray crystal structure of [Mo2(η5-C5H5)2(µ-H)-(µ-PPh2)(CO)3{P(OMe)3}]
- 1 January 1988
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 4,p. 1083-1088
- https://doi.org/10.1039/dt9880001083
Abstract
The thermal reaction of [Mo2(η5-C5H5)2(CO)6] with PPh2H in toluene or decalin gives [Mo2(η5-C5H5)2(µ-H)(µ-PPh2)(CO)4](1a) in high yield. An analogous reaction with PPhH2 affords [Mo2(η5-C5H5)2(µ-H)(µ-PPhH)(CO)4](1b). The photolytic reaction of (1a) with organophosphours ligands, L, gives the monosubstituted complexes [Mo2(η5-C5H5)2(µ-H)(µ-PPh2)(CO)3L][L = P(OMe)3,P(OPh)3,PPh3,P(C6H4Me-m)3, PEt2Ph, or dppm-P(dppm = Ph2PCH2PPh2)]. 1H N.m.r. spectroscopy reveals that each of the monosubstituted products exists as an equilibrium mixture of two isomers in solution, the position of the equilibrium depending on the ligand L and on the solvent. The structure of [Mo2(η5-C5H5)2(µ-H)(µ-PPh 2)(CO)3{P(OMe)3}] in the solid state has been determined by a single-crystal X-ray analysis.Keywords
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