Abstract
Evidence of chain folding in long chain linear alkanes C n H 2 n+2 n⩾168 was obtained by Raman and FTi.r. spectroscopy. Investigation of cyclic alkanes C n H 2 n with 24⩽ n⩽288 using vibrational spectroscopy allows for identification of specific bands due to folding as well as determination of conformational sequences in the fold region. The cyclic alkanes with n=48, 72 and 96 were crystallized from solution with monoclinic structures, whereas the alkanes with n=144 and 288 were obtained as orthorhombic crystals. It has been found that the cyclic alkanes with n=72 and 96 crystallize from the melt as crystallites with a high degree of orthorhombic character.
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