Structure of a permethylcyclopentadienyl‐μ‐tetramethylcyclopentadienylmethylene scandium dimer

Bis(eta5-pentamethylcyclopentadienyl)-bis[mu-2,3,4,5-tetramethyl-1-methylene-ScC1:Sc'(eta5)-cyclo-pentadienyl]-discandium(III), [SC2(C10H15)2-(C10H14)2], M(r) = 628.90, triclinic, P1bar, a = 8.641 (5), b = 9.478 (2), c = 12.338 (5) angstrom, alpha = 75.58 (3), beta = 80.39 (4), gamma = 63.75 (3)-degrees, V = 875.8 (7) angsrom3, Z = 1, D(x) = 1.19 g cm-3, lambda(Mo Kalpha) = 0.71073 angstrom, mu = 4.11 cm-1, F(000) = 340, room temperature, R (on F) = 0.046 for 2241 reflections with F(o)2 > 3sigma(F(o)2). Two bis(pentamethylcyclopentadienyl)scandium molecules are joined across a center of symmetry. One of the Cp* methyl groups has lost an H atom and that methylene group bonds to the symmetry-related Sc atom: Ss-C6' = 2.282 (5) angstrom. Other aspects of the bis-Cp*Sc geometry are normal.