Arsinocarbyne reactivity†
Benjamin J.
Frogley 
a
and
Anthony F.
Hill
*a
a
and
Anthony F.
Hill
*a
Abstract
The reactivity of the tungsten diphenylarsinocarbyne [W(![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CAsPh2)(CO)2(Tp*)] (1; Tp* = hydrotris(dimethylpyrazolyl)borato) is described. The pyramidal arsenic coordinates to a selection of 5d metal centres, forming heterobi- or trimetallic complexes with osmium(II), iridium(III), platinum(II) and gold(I). In the latter case, the WC bond provides a competitive site for gold(I) coordination. Treatment with MeOSO2CF3 results in methylation at arsenic to give the first example of an arsoniocarbyne, [W(CAsPh2CH3)(CO)2(Tp*)]O3SCF3, for which only the WC bond remains available for gold(I) coordination.
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