Crystal Structure of a Tetracoordinate Organoboron Coordination Compound, Dimethylformamide-triphenylborane Complex

抄録

A tetracoordinate organoboron coordination compound dimethylformamide-triphenylborane complex (DMF-BPh₃) was prepared, and characterized by single-crystal X-ray method. The compound crystallized in the orthorhombic space group Pna2₁ and Z = 4 with cell parameters a = 16.6818(12)Å, b = 11.5428(8)Å, c = 9.2234(6)Å, V = 1776.0(2)ų. The R₁ [I > 2σ(I)] and wR₂ (all data) values were 0.042 and 0.1020, respectively, for all 4299 independent reflections. Three phenyl groups and one dimethylformamide (DMF) bound to the central boron atom, forming a tetrahedral geometry. The B–O(DMF) distance [1.601(3)Å] was found to be shorter than the B–C distances [1.616(3) – 1.626(3)Å].