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Formation of a Phosphine−phosphinite Ligand in RhCl(PRR‘2)[P,P-R‘(R)POCH2P(CH2OH)2] and R‘H from cis-RhCl(PRR‘2)2[P(CH2OH)3] via P−C Bond Cleavage

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posted on 15.10.2007, 00:00 by Fabio Lorenzini, Brian O. Patrick, Brian R. James
Reaction of RhCl(1,5-cod)(THP), where THP = P(CH2OH)3, with several PRR‘2 phosphines (R = or ≠ R‘) generates, concomitantly with R‘H, the derivatives RhCl(PRR‘2)[P,P-R‘(R)POCH2P(CH2OH)2] in two isomeric forms. The hydrogen of the hydrocarbon co-product derives from a THP hydroxyl group which becomes an ‘alkoxy' group at the residual PRR‘ moiety, this resulting in the P,P-chelated R‘(R)POCH2P(CH2OH)2 ligand. One of the isomers of the PPh3 system, cis-RhCl(PPh3)[P,P-P(Ph)2OCH2P(CH2OH)2], was structurally characterized (cis refers to the disposition of the P atoms with Ph substituents).

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