Conformational structures of alkyl groups in the multi alkyl substituted benzene rings in the solid state have been intensively investigated.1{3 The conformation of the alkyl groups such as up and down based on the benzene ring plane is attractive since the conformational isomers can be distinguished in the solid states. Usually, the substituted benzene rings show the most stable conformation in the solid state and the alkyl groups take alternately up and down ...
