Hydrogen-Bonding Arrangements of Molecules ROH

In an alternative arrangement, as exemplified by the crystal structures of C17H35OH [126] and H0(CH2)90H [78], the molecules are hydrogen bonded both 

Some phenols [128-130] crystallize with a hydrogen-bond helix 23 a, in which the molecules are interlinked about a 3,-axis of length 4.6 A. Phenol itself [131], o-cresol [132] and m-cresol [133] form helical hydrogen-bond arrays along a (pseudo) threefold axis of length 6 A, as shown in 23b. 

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