Crystal and molecular structure of triphenylarsine

Triphenylarsine crystallizes in the triclinic space group P-1 (No. 2), a=11.200(2), b=15.263(7), c=17.871(6) Å, α=84.63(5), β=80.21(5), γ=86.41(6)°, Z=8, with four molecules in the asymmetric unit. The structure was solved by direct methods and refined in the initial stages by full-matrix least squares and finally by block-diagonal least-squares methods to R=0.055 for 3537 reflections. The dimensions and the conformations of the four independent molecules are almost identical. The molecules do not exhibit C_{3 v} symmetry.