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Updated: Jun 1, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
[(Di-o-tolyl-phosphino)meth-yl]diphenyl-phosphine sulfide
Abstract:
In the title compound, C(27)H(26)P(2)S, the P-C-P angle is 114.33 (13)°. The bond distances are longer and the bond angles are smaller at the P atom bonded to the o-tolyl groups owing to the presence of a lone pair of electrons. One phenyl ring is disordered over three sites [occupancies 0.317 (8), 0.250 (8), and 0.433 (6)] and the other phenyl ring is disordered over two sites [occupancies 0.871 (6) and 0.129 (6)].
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The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
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