6533b85efe1ef96bd12c0524

RESEARCH PRODUCT

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Hartwig HöckerKlaus Riebel

subject

Entropy of fusionLinear function (calculus)Chain lengthFusionChemistryThermalPolymer chemistrySalt metathesis reactionMelting point

description

The thermal behavior of cycloalkanes (CH2)n with 12 ≤ n ≤ 84 prepared by metathesis reaction of cyclododecene, GPC separation of the oligomers, and hydrogenation has been investigated. The molar enthalpies of fusion being lower by a certain amount than those of the corresponding n-alkanes are a linear function of the chain length n. The entropy of fusion per CH2 increases with chain length in a not-linear mode (when plotted vs. 1/n). The melting points of the cycloalkanes are lower than those of the corresponding n-alkanes, the difference becoming smaller with increasing chain length.

https://doi.org/10.1002/macp.1977.021781113