Preparation and X-Ray Structure of 3,5-Dimethyl-1,4-dichloro-1,2,6- thiadiazine-1-oxide

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Preparation and X-Ray Structure of 3,5-Dimethyl-1,4-dichloro-1,2,6- thiadiazine-1-oxide

Tristram Chivers*, Xiaorong Li, Masood Parvez

Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4 Z. Naturforsch.53 b,532–534 (1998); received December 18, 1997

Crystal Structure, 1,2,6-Thiadiazines, Sulfanuric Chloride

The title compound was obtained by the reaction of 3,5-dimethyl-2H-1,2,6-thiadiazine-1,1- dioxide with PCl5in chloroform. It crystallizes in the monoclinic system, space group P21/c, a

= 7.521(7) ˚A, b = 8.400(4) ˚A, c = 13.908(4) ˚A,= 100.35(4), V = 864.4(8) ˚A³, and Z = 4.

The S(VI) atom lies 0.43 ˚A out of the plane of the-delocalized NCCCN unit. The mean S-N bond distance is 1.569(3) ˚A.

Reprint requests to Tristram Chivers; Fax: 403-289-9488, e-mail: chivers@acs.ucalgary.ca

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