References
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- Alcudia , F. , Fernandez , I. , Trujillo , M. , Zorrilla , F. and Marhuenda , E. 1989 . Tetrahedron , 45 : 1491 For recent reports concerning the conformational analysis of organic compounds with Oxygen/Sulphur)1.2-gauche interaction, both in cyclic and acyclic series, see for example
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- Bakke , J. M. 1986 . Acta Chem. Scand. , B40 : 407 The JCH.OH coupling constants depend on the torsion angle θ through an equation similar to that proposed by Karplus. When the intramolecular association between the OH and the thioether sulphur takes place there is a gauche relationship between H(1) and OH protons (small J value). The (OH., Ring) association increases the θ angle and a higher JI.OH value can be expected. See for example:
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- Jochims , J. C. , Taigel , G. , Seeliger , A. , Lutz , P. and Driesen , H. E. 1967 . Tetrahedron Lett. , : 4363 The required arrangement for these long-range 4J coupling constants to be possible (“W” coplanar disposition) is only possible in the rotamers A2 (4J2·me and A3 (4J3·me. See for example
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