H.V.R.D. thanks the Robert A. Welch Foundation (grant Y-1289) for financial support of this research. T.R.C. acknowledges the National Science Foundation (CHE-0701247) for its support of this research.
Ethylene el dorado: Gold(I) unusually takes up three ethylene molecules in a spoked-wheel arrangement (see picture). The complex was synthesized as the hexafluoroantimonate salt and structurally characterized.