Validity of infrared criteria in the assignment of conformations to substituted 1, 3, 2-dioxathiane 2-oxides. Crystal structure of 4, 4-dimethyl-6, 6-diphenyl-1, 3, 2- …

…, C Van Alsenoy, ATH Lenstra, HJ Geise

Index: Petit, G. H.; Nuffel, P. Van; Alsenoy, C. Van; Lenstra, A. T. H.; Geise, H. J. Journal of the American Chemical Society, 1984 , vol. 106, # 23 p. 6899 - 6904

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Citation Number: 8

Abstract

Abstract: 4, 4-Dimethyl-6, 6-diphenyl-1, 3, 2-dioxathiane 2-oxide crystallizes in the monoclinic space group C2/c, Z= 8, with a= 17.239 (10) A, b= 9.771 (10) A, c= 18.390 (8) A,/3= 107.74 (4)'at 110 K. The X-ray determination converged to R= 0.032 and showed the sulfite ring to have a boat-like conformation. Infrared spectroscopy in solution as well as in the solid state interpreted according to accepted criteria indicated, however, the sulfite ring ...