Mononuclear palladium(II) complexes with the phenylselenolato ligand. The crystal and molecular structure of trans-[Pd(SePh)2(P(n-Bu)3)2]

Article abstract of DOI:10.1016/S0277-5387(98)00048-5

Mononuclear palladium(II) complexes of the type [Pd(SePh)₂L₂] [where L = PMe₃, PEt₃, P(n-Bu)₃, PMePh₂ or TPA (1,3,5-triaza-7-phosphaadamantane)] have been prepared and characterized by elemental analysis, ¹H, ¹³C{¹H} and ³¹P{¹H} NMR data and in the case of [Pd(SePh)₂(P(n-Bu)₃)₂] by single-crystal X-ray diffraction methods. Crystals of [Pd(SePh)₂(P(n-Bu)₃)₂] are triclinic, space group P1, a = 8.4798(7), b = 10.3002(15), c = 12.254(2)A, α = 77.957(15), β = 85.806(11), γ = 83.550(9)°, Z = 1. The structure was refined by full-matrix least-squares calculations on F² to final R values R_obs = 0.0267 (for 3187 reflections with I ≥ 2σ(I)) and wR(F²) = 0.0657 (for all 4549 measured reflections). The structure determination shows that the Pd atom lies on an inversion centre so that the coordination geometry is necessarily trans and planar. Main bond lengths are Pd-P 2.3334(7) and Pd-Se 2.4609(4)A.