Synthesis and X-ray Structure of a Highly Symmetrical Selenium-Centered Hexanuclear Neodymium Complex, [Cpt6Nd6Se13]- (Cpt = η5-ButC5H4)

The half-sandwich tert-butylcyclopentadienyl neodymium complex [CptNdCl2(THF)2]2 (1) reacts with Na2Se5 to give organoneodymium polyselenide complex [Na(THF)6][Cpt6Nd6(μ6-Se)(μ2-Se2)6] (2), which has been characterized by X-ray crystallography.