MOLECULAR STRUCTURE OF TETRAPHENYLANTIMONY HYDROXIDE

The structure of tetraphenylantimony hydroxide has been determined from three-dimensional X-ray diffraction data (1912 independent reflections) measured on a counter diffractometer. The molecule is a slightly distorted trigonal bipyramid with the hydroxyl group occupying an axial position. The antimony-carbon bond lengths are 2.218 Å for the axial bond and in the range 2.116-2.140 Å for the equatorial bonds while the antimony-oxygen distance is 2.048 Å. The molecules are packed in pairs with the -OH groups facing each other through the center of symmetry and associated by hydrogen bonding. Pertinent crystallographic data are as follows: space group, [formula-ommitted], unit cell dimensions, a = 10.309 ± 0.007 Å, b = 10.138 ± 0.007 Å, c = 10.373 ± 0.007 Å; α = 92° 3′ ± 3′ β = 86° 3′ ± 3′ γ = 112° 35′ ±3′ V = 998.6 Å3; density 1.50 ± 0.01 g cm−3 (measured), 1.49 g cm−3 (calcd for Z = 2). © 1969, American Chemical Society. All rights reserved.