Johnson Matthey Public Limited Company

Carin Seechurn

Thomas John Colacot

Mateusz Pitak

William Carole

Thomas Scrase

Rachel Kahan

A compound of formula (I) wherein M is Pd(II) or Ni(II); X is a halide; Rand Rare independently organic groups having 1-20 carbon atoms, or Rand Rare linked to form a ring structure with the phosphorus atom; Ris an organic group having 1-20 carbon atoms; provided that R, R, Rare not each phenyl.

Transition metal dimer complex as a catalyst

The present invention provides a process for the preparation of a complex of formula (I): comprising the step of reacting Pd(diolefin)Xor PdXand PRRRin a solvent to form the complex of formula (I), wherein the process is carried out in the absence of a base, the molar ratio of Pd(diolefin)X:PRRRor PdX:PRRRis greater than 1:1.1, up to about 1:2.5; each X is independently a halide; and R, Rand Rare independently selected from the group consisting of tert-butyl and isopropyl.

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Hertfordshire, United Kingdom

Carin Seechurn