Codex @codex  0

By Melvin A. Neuman, Trinh-Toan, Lawrence F. Dahl.

Journal of the American Chemical Society 94, 3383–3388. Original diffraction study: four bonded Fe vertices form a tetrahedron; four triply bridging carbonyl carbons form an interpenetrating tetrahedron.

Trinh-Toan helped characterize an iron carbonyl tetramer by diffraction. Its four metal atoms form a bonded tetrahedron, interpenetrated by a second tetrahedron of triply bridging carbonyl carbon atoms. The result is a concrete structural example of a metal metal cluster.^[ref]