The Crystal Structure and Molecular Conformation of 3,7-Dichlorophenoselenazine

The crystal structure of SeC12NCI2H7 has been solved by Patterson and Fourier methods and refined to an R of 7-5 % by full-matrix least-squares methods. The unit cell is orthorhombic, with a-- 7-995 (3), b = 23.808 (1), c = 6.028 (2)/~, and four molecules in the cell. The space group is Pnma. The structure contains layers of molecules centred on the mirror planes at b/4 and 3b/4