CCDC doesn't contain any molecules of such geometry. The closest topology observed is among pnictogens such as $\ce{P, As, Sb}$, which form tetrahedron units $[\ce{P4}]$, $[\ce{As4}]$, $[\ce{Sb4}]$ which are readily coordinating with Au, Rh, Ag and Cu by edge-sharing: [![enter image description here][1]][1] The first publication ([1][2]) tetraphosphido-ligand presents the following structure of $\ce{Rh}$-complex: [![enter image description here][3]][3] The most relevant structure best fitting the required connectivity matrix would probably be bis(tricyclo[$1.1.0.0^{2,4}$]tetraphosphane)-gold ([2][4]): [![enter image description here][5]][5] (1) Lindsell, W. E.; McCullough, K. J.; Welch, A. J. J. Am. Chem. Soc. 1983, 105 (13), 4487–4489. [DOI: 10.1021/ja00351a067][2] <br> (2) Forfar, L. C.; Clark, T. J.; Green, M.; Mansell, S. M.; Russell, C. A.; Sanguramath, R. A.; Slattery, J. M. Chem. Commun. 2012, 48 (14), 1970–1972. [DOI: 10.1039/C2CC15291F][4] [1]: https://i.sstatic.net/L0TGT.png [2]: http://pubs.acs.org/doi/abs/10.1021/ja00351a067 [3]: https://i.sstatic.net/TA3iQ.png [4]: http://pubs.rsc.org/en/Content/ArticleLanding/2012/CC/c2cc15291f [5]: https://i.sstatic.net/y867T.png