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Reference.org
Trigonal prismatic molecular geometry
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<p>In <a href="/facts/Chemistry/SrNqkGVm">chemistry</a>, the trigonal prismatic molecular geometry describes the shape of compounds where six atoms, groups of atoms, or <a href="/facts/Ligand/6etB3qeW">ligands</a> are arranged around a central atom, defining the vertices of a <a href="/facts/Triangular_prism/Yjp4Kw9M">triangular prism</a>. The structure commonly occurs for d0, d1 and d2 transition metal complexes with covalently-bound ligands and small charge separation. In d0 complexes it may be ascribed to sd5 hybridization, but in d1 and d2 complexes the d<i>z</i>2 orbital is occupied by nonbonding electron (pair). Furthermore, when unoccupied, said orbital participates in bonding and causes C3v distortion, like in W(CH3)6. </p>