Complex Formation of Biphenyl with Cationic Surfactants

4 Complex Formation of Biphenyl with Cationic Surfactants [54] 

Since the occupancy factor of the biphenyl molecule in each site is 0.5, the biphenyl molecule occupies alternate positions along the a-axis. Therefore, there are no short contacts between them along the a-axis. This observation is distinct from the anthracene complex crystal, in which the anthracene molecules adopt a disordered structure along the a-axis, see above. This may suggest that there are fairly strong interatomic interactions between the atoms of the biphenyl and surfactant molecules compared with those of the anthracene complex. 

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