Structure Studies of Solutions of Large Organic Molecules. III. Liquid Crystallike Arrangement of Dissolved Long Chain Molecules

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Abstract
An x‐ray diffraction study has been made of the effect of chain length on the configuration of dissolved long chain molecules. In solutions of alkane monoiodides of nearly equal length, the molecules line up such that the interiodine distance is roughly equal to the sum of the chain lengths. When the lengths are quite disparate, the longer chains order preferentially, as manifested by a gross x‐ray spacing of about twice the longest chain length. The morphology and concentration persistence of the solute aggregates are discussed and it is concluded that these latter are in quasiliquid crystal form.