S. Abbas et al., A CUBIC MODIFICATION OF (TRIPHENYLARSINE)DIIODINE, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 717-719
Cubic packing has allowed (triphenylarsine)diiodine (C6H5)3AsI2, to ad
opt strict C3 point symmetry with the three phenyl rings arranged in t
he form of a propeller around the linear As-I-I chain [I-As-C-C 54 (2)
degrees]. Donation of the arsenic lone pair to iodine [As-I 2.616 (3)
angstrom] considerably weakens the 1-1 bond [I-I 3.014 (3) angstrom].