Summary
The new tertiary phosphine t-13u2(2-MeO-5-MeC6H3CH2)P, L, was prepared by the base treatment of the phosphonium salt, LH+I−, which was in turn prepared from t-Bu2PH, 2-MeO-5-MeC6H3CH2Cl and sodium iodide. This phosphine, L, reacts with various chloro-rhodium and -iridium species without O-demethylation. This contrasts with the behaviour of t-Bu2PC6H4OMe-2 which demethylates readily on similar treatment to give chelate complexes. The completely different behaviour between this new 2-methoxybenzylphosphine, L, and the 2-anisylphosphine, t-Bu2PC6H4OMe-2, is explained in terms of steric effects.
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Empsall, H.D., Heys, P.N. & Shaw, B.L. Some complexes of rhodium and iridium with 2-(di-t-butylphosphinomethyl)-1-methoxy-4-methylbenzene. Transition Met Chem 3, 165–169 (1978). https://doi.org/10.1007/BF01393536
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DOI: https://doi.org/10.1007/BF01393536