A cyanide-bridged wheel featuring a seven-coordinate Mo(iii) center

Abstract

A new cyclic molecule incorporating [Mo^III(CN)₇]⁴⁻ has been characterized by single crystal X-ray methods, SQUID magnetometry and theoretical calculations. The wheel molecule [Mo^III(CN)₇]₆[Ni(L)]₁₂(H₂O)₆ exhibits ferromagnetic Mo–Ni coupling which did not exist for the previously reported octacyanometallate analogue [Mo^IV(CN)₈]₆[Ni(L)]₁₂(H₂O)₆. These results indicate that known supramolecular architectures incorporating octacyanometallates can be used as platforms for making new molecules incorporating seven-coordinate cyanide precursors.