Tris(thiocyanato-κN)tris(triphenylphosphine oxide-κO)terbium(III)

Abstract

The title compound, [Tb(NCS)3(C18H15OP)3], contains a six-coordinate TbII cation surrounded by three O-bound triphenylphosphine oxide ligands and three N-bound thiocyanate ligands, each in a fac arrangement. There are two crystallographically unique TbIII atoms in the asymmetric unit. One TbIII atom resides on a threefold rotation axis, while the other has no imposed crystallographic symmetry. The thiocyanate ligands are bound through N atoms, illustrating the hard–hard bonding principles of metal complex chemistry.