Inorganic Chemistry, Vol.60, No.6, 3524-3528, 2021
Triple-Decker Sandwich Complexes of Tungsten with Planar and Puckered Middle Decks
A triple-decker complex of tungsten, [(Cp*W)(2){mu-eta(6):eta(6)-B4H4Co2(CO)(5)}(H)(2)] (1; Cp* = eta(5)-C5Me5), with a planar middle deck has been isolated by thermolysis of an in situ formed intermediate from the reaction of Cp*WCl4 and LiBH4 with Co-2(CO)(8). In addition, we have also isolated another triple-decker complex, [(Cp*W)(2){mu-eta(6):eta(6)-B5H5Fe(CO)(3)}(H)(2)] (4), having a puckered central ring, from a similar reaction with Fe-2(CO)(9). Clusters 1 and 4 are unprecedented examples of a triple-decker complex having a 24-valence electron with bridging hydrogen atoms.