Ma. Alvarez et al., A HIGHLY ELECTROPHILIC UNSATURATED DITUNGSTEN DICATION, Angewandte Chemie, International Edition in English, 32(8), 1993, pp. 1156-1157
Through hydride or fluoride abstraction, the dication 1 reacts with BH
3 . THF (PF6-) to give monocationic complexes in which a hydrido (fluo
ro) ligand bridges a W-W triple bond (W-W single bond). The unusually
high electrophilicity of 1 arises from the combination of positive cha
rge and metal-metal multiple bond. The counterion in each case is PF6-
.