Hi, I want to obtain order parameter for unsaturated carbons (eg. 9, 10) on oleoyl (18 carbons) chains.
i use -Scd= 2/3 Sxx +1/3 Syy for the saturated carbons. I try to calculate order parameters for unsaturated carbons, which is defined as: Scd=1/4Szz + 3/4 Syy + sdr(3)/2 Syz , with ignore third term (sqr(3)/2 Syz) : but i don't know do i use this correlation for 8, 9 carbons or 9,10 ? because the segmental vector Cn-1 to Cn+1 is taken as the molecular axis of the Cn methylene group. thanks in advans, Afsaneh Maleki
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