Competent intermediates in palladium(0)–copper(I) mediated catalytic cross coupling reactions of the bromocarbyne complex [W(![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CBr)(CO)2(Tp*)] (Tp* = hydrotris(dimethylpyrazolyl)borate) have been isolated however heterobimetallic phosphoniocarbyne complexes [WPd(μ-CPPh3)Br(CO)2(PPh3)x(Tp*)] are identified as productive (x = 1) or non-productive (x = 0) tangents to the catalytic cycle.
L. K. Burt, R. L. Cordiner, A. F. Hill, R. A. Manzano and J. Wagler, Chem. Commun., 2020, 56, 5673 DOI: 10.1039/D0CC02070B
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