2,3-DIMETHYL-1-ETHYL-1,2,3-ALUMINADICARBADODECABORANE; A VERSATILE CARBOALLYL TRANSFER REAGENT

Article abstract of DOI:10.1016/0022-328X(87)83021-8

2,3-Dimethyl-1-ethyl-1,2,3-aluminadicarbadodecaborane, prepared from triethylaluminum and 7,8-dimethyl-7,8-dicarbadodecaborane, has been shown to be a useful precursor for the synthesis of icosahedral main-group carboranes.The electrophilicity of the aluminum atom, which is illustrated by the formation of adducts with diethyl ether and tetrahydrofuran, enables the compound to undergo substitution reactions with nucleophiles.Whereas conversion with methylboron dibromide, germanium diiodide, or tin dichloride yielded the corresponding methylboron-, germanium- and tin-substituted icosahedrons, treatment with trimethyltin chloride or dimethyltin dichloride gave 1,1,2,3-tetramethyl-1,2,3-stannadicarbadodecaborane, apparently the first metalladicarbadodecaborane containing tetravalent tin.