4,4'-Dimethyl-1,1'-Bi(1,2,3,5-Diselenadiazole)

by Bryan, Clinton Dave; Cordes, A. Wallace; Oakley, Richard T.; Spence, Rupert E. von H.

The radical units Se(2)N(2)CMe dimerize with long Se...Se distances of 3.159 (3) and 3.187 (3) Angstrom to give the title compound, C4H6N4Se4. There are two crystallographically independent dimers in the unit cell. The dimers adopt a twisted conformation with parallel ring planes. One ring is rotated on the axis between ring centers by approximately 90 degrees from the eclipsed position to give Se-Se-Se-Se torsion angles of 86.81 (15) and 88.95 (17)degrees. Se-Se bond lengths within the radicals vary from 2.306 (3) to 2.330 (3) Angstrom.

Journal
Acta Crystallographica Section C-Crystal Structure Communications
Volume
51
Year
1995
Start Page
2402
ISBN/ISSN
2053-2296; 0108-2701
DOI
10.1107/S0108270195006147