Preparation and Structural Variety of Neutral Heptaphospha-Nortricyclane Derivatives of Zinc and the Coinage Metals

Abstract

In this study, we report the preparation of neutral Au(I), Ag(I), and Cu(I) derivatives [(hyp)2P7M]n (M = Au, n = 2; M = Ag, Cu, n = 4) of a heptaphospha-nortricyclane cage. Synthesis was conducted via a halodesilylation route under the cleavage of the sterically less shielded trimethyl silyl group, starting from the heteroleptic cage (hyp)2(tms)P7. All coinage metal derivatives exhibit short metal–metal distances of 2.9542(2) Å (Au), 2.8833(6) Å (Ag), and 2.654(1) Å (Cu), respectively. The same synthetic methodology was also applied for the preparation of a zinc derivative, [{(hyp)2P7}2Zn]*Et2O, for which full multinuclear NMR characterization could be conducted.

Keywords

• coinage metals
• copper
• silver
• gold
• main group chemistry
• phosphorus