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Scharfenberg P. Quantenchemische Geometrieberechnungen von Benzenderivaten und Modellierung der Ringstörungen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19870270616] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Crystal structure of 7-(2-oxo-2,3-dihydrol,3-benzoxazol-3-yl)-4,6-dinitrobenzofurazan 1-oxide. Z KRIST-CRYST MATER 1992. [DOI: 10.1524/zkri.1992.200.3-4.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
C13H5N5O8, M = 359.22, monoclinic space group P21/c, a = 6.838(1), b = 6.754(2), c = 30.845(6) A, β = 93.23(2)°, Z = 4, V = 1422(1) Å3, Dx
= 1.677 gmc−3, λ = 0.71069 Å, μ = 1.3 cm−1, F(000) = 728. The crystal structure was determined by direct methods and refined by least-squares procedure to a discrepancy factor R = 0.033. π-Electron densities were calculated by CNDO/2 calculations. The aromatic character of the six-membered ring of the dinitrobenzofuroxan fragment disappeared and a polymethinic structure is built up in the molecule.
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