Tris(trimethylstanny1)silyl Complexes of Ruthenium and Platinum

Abstract

By addition of (THF)₃LiSi(SnMe₃)₃ to the appropriate metal chloride reagent, the complexes Cp^*(PMe₃)₂RuSi(SnMe₃)₃(1,Cp^* = η⁵ – C₅Me₅) and (dcpe)Pt[Si(SnMe₃)₃] Cl(2, dcpe = Cy₂PCH₂CH₂Pcy₂) have been prepared and structurally characterized. Structural parameters for complex 1 indicate that it is quite sterically congested. Complex 2, which is less sterically hindered, undergoes rearrangement in refluxing benzene to the complex (dcpe)Pt[Si(SnMe₃)₂Cl](SnMe₃) (3). Single-crystal data are as follows: (l), monoclinic, P2₁/n, with a = 10.360 (3) Å, b = 21.127 (5) Å, c = 17.200 (4) Å, β = 97.59 (2)°, V = 3731 (2) Å, Z = 4, d(ca1cd) = 1.616 gcm⁻¹, 3575 observed rsflections, and R = 3.83%(R_W= 4.95%); (2), monoclinic, C2/c, with a = 39.09 (2) Å, b = 10.314 (4) Å, c = 22.904 (10) Å, β = 95.42 (4)°, V = 9193 (7) ų, Z= 8, d(ca1cd) = 1.694 gcm⁻¹, 4258 observed reflections, and R = 4.13%(R_w = 5.67%).