Crystal structure of ethyl 4-methylthio-3-phenyl-2-thioxo-2,3-dihydro-1,3-oxazole-5-carboxylate
作者:Frank W. Heinemann、Wolfgang Dölling、Thomas Gildenast、Helmut Hartung
DOI:10.1007/bf01665176
日期:1995.5
The title compound C13H13NO3S2 crystallizes in the triclinic space group P $($) over bar$$ 1 (Z = 2) with lattice constants a = 8.382(2), b = 10.042(2), c = 10.134(2) Angstrom, alpha = 119.35(1)degrees, beta = 101.40(1)degrees and gamma = 90.54(1)degrees. The interplanar angle between the least squares planes of the 1,3-oxazoline ring and the phenyl ring amounts to 90.2 degrees, thus hindering conjugation between the benzene and heterocyclic system. The observed bond parameters of the five-membered heterocycle suggest a significant contribution from a zwitterionic dipolar limiting structure [38.7(5)%] to the description of this ring system. The particular contributions of the resonance structures were estimated by calculations using the HOSE model on the base of the observed bond lengths.
Doelling Wolfgang, Gildenast Thomas, Phosph., Sulfur and Silicon and Relat. Elem, 82 (1993) N 1-4, S 163- 169
作者:Doelling Wolfgang, Gildenast Thomas
DOI:——
日期:——
Doelling, Wolfgang; Gildenast, Thomas, Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 82, # 1-4, p. 163 - 170