ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Diazoxide, C8H7ClN2O2S, is monoclinic:P21/c,a = 7.209(8),b = 6.610(8),c = 19.263(11) Å, β = 91.01(6) °,Z = 4. The structure was solved by Patterson and Fourier methods and refined to anR of 4.2% by the use of 1174 independent observed reflections which were collected on a computer-controlled, four-circle Philips diffractometer (MoKα radiation). The molecular structure shows that the 4H form of 1,2,4-benzothiadiazine-7-chloro-3-methyl-1,1-dioxide is the predominant tautomer. The benzothiadiazine ring is roughly planar with the sulfonyl group perpendicular to the ring. The bond lengths and angles are in good agreement with the average values observed in related structures. There is substantial evidence for double-bond character in the two N(2)−C(3) and C(3)−(4) bonds and for delocalization of π electrons. Short N(4)⋯O(2) and N(2)⋯Cl intermolecular distances (2.92 and 3.19 Å, respectively), with appropriate geometries, indicate the presence of hydrogen bonds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01218380
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