Insecticides. Part III. Crystal structures of endrin (1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-endo-1,4,-endo-5,8-dimethanonaphthalene) and aldrin (1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-hexahydro-endo-1,4-exo-5,8-dimethanonaphthalene)

Abstract

The crystal structure of endrin was determined by Patterson and Fourier methods from three-dimensional diffractometer data with 753 reflections. Z = 4 in the orthorhombic unit cell, space group, P212121, a= 1530·4(2), b= 1148·6(1), and c= 820·2(1) pm. The structure was refined by least-squares to R 0·044. The crystal structure of aldrin, was determined by the symbolic addition procedure from three-dimensional diffractometer data with 1080 reflections. Z = 4 in the monoclinic unit cell, space group P21/n, a= 1080·6(1), b= 1474·3(2), c= 899·2(1) pm, β= 93·03(1)°, the structure was refined to R 0·048.