Metallaboratranes: Tris(methimazolyl)borane Complexes of Rhodium(I)
摘要:
The syntheses and reactivity of the first rhodaboratranes, [RhX(PPh3){B(mt)(3)}] (X = Cl, H) and [Rh(eta(4)-C8H12){B(mt)(3)}]Cl, are described in detail together with preliminary investigations of the mechanistic processes involved. The subsequent exploitation and circumvention of the lability of [RhCl(PPh3){B(mt)(3)}] in the synthesis of a range of isonitrile, [Rh(CNR)(PPh3){B(mt)(3)}]Cl (R = Bu-t, C6H3Me2-2,6, C6H2Me3-2,4,6), phosphine, [Rh(PMe3)(n)(PPh3)(2-n){B(mt)(3)}]Cl (n = 0, 1, 2), and dialkyldithiocarbamate, [Rh(S-2-NEt2){B(mt)(3)}]Cl, complexes is described, along with the attempted synthesis of [Rh(CN'Bu)(2){B(mt)(3)}]Cl from [Rh(eta(4)-C8H12){B(mt)(3)}]Cl. Single-crystal X-ray structure determinations of [Rh(L)(L'){B(mt)(3)}]Cl (L = (CNBu)-Bu-t, CN(C6H3Me2-2,6), L' = PPh3; L = L' = PMe3) are reported.