Structure of 6,13-bis(butylthio)-5,12-dioxa-6,13-dithioxo-6a,7,13a,14-tetraaza-6,13-diphosphadibenz[a,h]anthracene

Abstract

Abstract.C22H26N4OaPaS4, M r = 568"66, monoclinic, A2/a (non-standard setting), a = 14.941 (5) Deviations of three standard reflections, measured after each group of 200 reflections, was less than 3.1%. 2304 unique reflections were collected, of which 1017 were considered observed with I > 3o-(1). The intensities were corrected for Lorentz, polarization and absorption effects (with transmission coefficients in the range 0.82-0.97). The structure was solved by direct methods (MULTAN78; Main, Hull, Lessinger, Germain, Declercq & Woolfson, 1978) and the positions of all the H atoms were found in a Ap map at R = 0.064. The structure was refined by full-matrix least-squares calculations on F, using unit weights, anisotropic temperature factors for non-H atoms and isotropic temperature factors