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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
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An Ambiphilic Phosphide with Three Different Coordination Modes to Group 7-10 Metals
Adrien T Normand1, Hélène Cattey1, Marie-José Penouilh1
1Institut de Chimie Moléculaire de L'Université de Bourgogne (ICMUB), 9 avenue Alain Savary, 21000 Dijon, France.
Abstract:
Phosphide anions PX2- with electron-withdrawing substituents display ambiphilic properties. The use of P(V) thiophosphorane substituents enables the coordination of the resulting bis(thiophosphoranyl)phosphide anion (BTPP = L) to a variety of transition metals from groups 7 to 10. A series of homoleptic and heteroleptic complexes was synthesized and X-ray diffraction analysis revealed that, depending on the metal, L may adopt three coordination modes (κ3-(S, P, S); κ2-(S, S); κ2-(S, P)) supporting three distinct geometries (octahedral; tetrahedral; square planar). Complex LCo displays Single Molecule Magnet (SMM) properties, and complex LRh(COD) (COD = 1,5-cyclooctadiene) catalyzes the hydrosilylation of terminal alkynes.
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