Structure of Hydroxo(methyl)bis(η^5-pentamethylcyclopentadienyl)tantalum(V) Hydroxotris(pentafluorophenyl)borate

Abstract

[Ta(C_(10)H_(15))i(OH)(CH_3)][B(OH)(C_6F_5)_3], M_r = 1001.63, monoclinic, P2_1/n, ɑ = 12.217 (2), b = 16.848 (6), c = 18.834 (3) Å, β = 100.37 (2)°, V = 3813.l (15) Å^3, Z = 4, D_x = 1.75 g cm^(-3), λ{Mo Kɑ) = 0.71073 Å, μ = 29.52 cm^(-1), F(000) = 1972, room temperature, R = 0.031 for 3534 reflections with F_o^2 > 3σ(F_o^2). The Ta cation has the expected geometry, with Ta-C and Ta-O distances 2.211 (6) and 1.865 (5) Å, respectively. The anion has not been characterized previously; its geometry is irregular with tetrahedral angles at boron ranging from 103.6 (6) to 113.8 (6)º, and systematic angular distortions in the C_6F_5 rings.

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