Answers are grounded in this paper and cite their sources.
The first carbonylplatinum clusters established crystallographically to have tetrahedral Pt4 cores are [Pt4H(CO)(µ- CO)3L4]ReO42 and [Pt4(µ-CO)2L4(ReO4)2]3, L = P(C6H11)3, having 56 and 54 cluster valence electrons (CVE), respectively.
No takes yet. Share an insight, caveat, or question.
Hao et al. (1995) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: