Synthesis and X‐ray Structure of [{(Cp′2Nb)2WTe4}⋅W(CO)4]·1.5C7H8, the First Organometallic Derivative of the WTe42− Anion, and of [Cp′4Nb2Te2] (Cp′ = η5‐tBuC5H4)

Reaction of [Cp′2NbTe2H] (1) (Cp′ = η5-tBuC5H4) with [W(CO)6] in decane at 140 °C gives red [{(Cp′2Nb)2WTe4}⋅W(CO)4] (2), whereas in the reaction of 1 with [Cr(CO)6] green-black [Cp′4Nb2Te2] (3) is formed. The crystal structures of 2 and 3 have been determined. The structure of 2 contains a slightly distorted WTe4 tetrahedron to which two niobocene fragments and one W(CO)4 group are coordinated. The crystal structure determination of 3 reveals the presence of two Cp′2Nb units bridged by two Te atoms. Complex 2 represents the first example of an organometallic derivative of the unknown WTe42− anion.