Stabilization of a W26+ bimetallic complex supported by two N,N′,N″-triphenylguanidinate ligands

Formation of a dimeric tungsten(i) complex via C-H activation

An aminopyridinato ligand stabilized and coordinatively unsaturated dimeric tungsten(0) complex having an electronic structure with six metal centred HOMOs (σ²,π²,π²,δ²,δ², and δ*²) has been isolated and structurally characterized. Its reaction with a cryptand leads to a C-H bond activation of one of the isopropyl groups of the N-ligand to form a dimeric tungsten(i) complex.

Unprecedented W2(0) quadruply bonded complex supported by π-donor ligands

A quadruply bonded complex W2(DippF)2K2 with a W2(0) core was synthesized and structurally characterized. The observed W-W distance of 2.407(1) Å and DFT calculations are consistent to the unprecedented electronic structure in D(2h) symmetry of σ(2)π(2)π(2)δ(2)δ(2)δ*(2) where the HOMO is the δ* orbital.