[Cu (NPEt ) ] and [Ag (NPEt ) ] : Cubane Structures.

Unusual, highly symmetrical cubes are formed by the dodecameric cationic phosphoraneiminato complexes of copper(I) and silver(I) [M (NPEt ) ] , in which the metal atoms occupy the edges and the N atoms of NPEt groups the corners of the cube (see figure). The structures can be understood as molecular sections of the Cu N structure, which is inverse to the ReO -type structure.