1 Department of Chemistry, University of Virginia, 409 McCormick Road, PO Box 400319, Charlottesville, Virginia, 22904, USA.
2 Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 18-596, Cambridge, MA 02139-4307, USA. gilliard@mit.edu.
The non-bonding carbone lone pair in geometrically-constrained antimony and bismuth carbodiphosphorane complexes readily complexed AuCl to afford rare examples of geminal bimetallic carbone coordination featuring a main-group metal.