Hydroalumination of H 2 C==CHCH 2 SMe: Synthesis and Molecular Structure of ( t Bu) 2 Al(CH 2 CH 2 CH 2 SMe)

Abstract

Hydroalumination of H₂C==CHCH₂SMe with [(^tBu)₂Al(μ-H)]₃ yields the monomeric thioether compound (^tBu)₂Al(CH₂CH₂CH₂SMe). The molecular structure of (^tBu)₂ Al(CH₂CH₂CH₂SMe) consists of discreet monomers in which the thioether-alkyl ligand acts as a chelate ligand with an Al-S interaction [2.511(2) Å] that is significantly shorter than observed for other intra-molecular coordination compounds, 2.78–2.95 Å. The coordination about aluminum is highly distorted from tetrahedral and is therefore best described as capped trigonal planar or trigonal bipyramidal with a vacant coordination site. Crystal data: monoclinic, P2₁/n (No. 14), a = 6.6357(5), b = 13.630(1), c = 16.959(1) Å, β = 95.416(6)°. V = 1527.0(2) ų, Z = 4, R = 0.0412, R_w = 0.0503.