41720-04-1Relevant articles and documents
SYNTHESE ET ETUDE D'UN THIA-6a THIOPHTHENE CHIRAL (-)-DI(TRIMETHYL-1',2',2'CYCLOPENTYLENE-1',3')-(2,3)-(4,5) THIA-6a THIOPHTHENE STRUCTURE CRISTALLINE ET MOLECULAIRE
Sotiropoulos, Jean-Marc,Lamazouere, Anne-Marie,El Batouti, Nagui,Sotiropoulos, Jean,Dahan, Francoise,Jaud, Joel
, p. 97 - 110 (2007/10/02)
A chiral 6a-thiathiophthen has been synthesized from (+)-2-bornanone and the molecular structure determined by single crystal X-ray methods.The compound crystallized in monoclinic system with space group P21, a= 10.883(2), b= 13.843(7), c= 13.645(5) Angstroem, V= 2055 Angstroem3, Z = 4, Dc= 1.217 g cm-3.Two independent molecules exist in the unit cell.Bond lengths and angles have nearly identical values in these two molecules.The central heterocycle is somewhat distorted with the S1-S6a-S6 angle less than 180 deg.Besides, NMR 1H, 13C, UV spectra and circular dichroism (CD) were completed.A supplementary proof is given for the existence of double bonds, S1-C2 and C4-S6.CD measurements show that all transitions in the visible and ultraviolet regions present Cotton effect due to the chiral environment.The weak distortion of the central heterocycle could explain the forms of CD curves.
