group, tin and germanium the cluster atoms are located on the corners of a cube. Inorganic and organometallic tetrahedranes The tetrahedrane motif occurs broadly in chemistry. White phosphorus (P4) and yellow arsenic (As4) are examples. Several metal carbonyl clusters are referred to as tetrahedranes, e.g. tetrarhodium dodecacarbonyl. Metallatetrahedranes with a single metal (or phosphorus atom) capping a cyclopropyl trianion also exist. See also Dodecahedrane Prismane Prismane References Cycloalkanes Cluster chemistry Hypothetical chemical compounds Tricyclic compounds