LA-139 NMR-SPECTROSCOPY OF ALLYL LANTHANU M(III) COMPLEXES

La-139-NMR chemical shifts were measured for several anionic complexes of formulae [Li(C4H8O2)(3/2)][La(eta(3)-C3H5)(4)], [Li(C4H8O2)(2)][Cp (n)'La(eta(3)-C3H5)(4-n)](Cp' = Cp(eta(5)-C5H5); n = 1, 2 and Cp' = Cp (eta(5)-C(5)Me(5)); n = 1) and Li[R(n)La(eta(3)-C3H5)(4-n)] (R = N(Si Me(3))(2); n = 1, 2 and R = C=CSiMe(3); n = 4), as well as for neutral compounds of formulae La(eta(3)-C3H5)(3)L(n) (L(n) = (C4H8O2)(1.5), ( HMPT)(2), TMED), Cp(n)'La(eta(3)-C3H5)(3-n) (Cp' = Cp(eta(5)-C5H5), Cp (eta(5)-C(5)Me(5)); n = 1, 2) and La(eta(3)-C3H5)(2)X(THF)(2) (X = Cl , Br, I). Typical ranges of the La-139-NMR chemical shifts were found for the different types of complex independent of number and kind of o rganyl groups directly bonded to lanthanum.