Metallaboratranes Derived from a Triphosphanyl–Borane: Intrinsic <i>C</i>₃ Symmetry Supported by a Z‐Type Ligand

Symmetry from within: Coordination of a triphosphanyl–borane ligand to gold(I) and platinum(0) affords metallaboratranes exhibiting C3 symmetry both in solution and in the solid state. Such a helical geometry is supported by axial M→B dative interactions and results from the envelope conformations of the PCCBM metallacycles. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z705024_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.