CRYSTAL STRUCTURE OF 1,4-BIS(IODODIPHENYLTIN)BUTANE

The solid state structure of 1,4-bis(iododiphenyltin)butane, (C6H5)2ISn- (CH2)4-SnI(C6H5)2, has been determined by single crystal X-ray diffraction techniques at room temperature. The monoclinic crystals are in the space group P21/c with a = 10.06±0.02, b = 11.36±0.02, c = 14.36±0.03 Å and β = 199° 40′±18′ The final isotropic conventional R factor is 9.6% based on 1537 photographically observed data. The calculated and observed densities are 1.95g/cm3 and 1.95g/cm3 respectively based on two molecules per unit cell. The molecule is symmetrical and resides on a crystallographic center of symmetry. The coordination about each tin atom is approximately tetrahedral. The average SnC phenyl bond length is 2.15± 0.02Å, the average methylene bond length is 1.55±0.03Å, and the SnI bond distance is 2.729±0.003 Å. © 1969.