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Several methanol (ch3oh) dimers are drawn below, and several proposed intermolecular bonding interactions are highlighted in green. if a highlighted interaction is a valid hydrogen bond, leave it unaltered. if the interaction is not a valid hydrogen bond, delete the green bond to yield two non-interacting alcohol molecules. if needed, the module may be restored to its original state by clicking on the red over-under arrows.
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Positive dimers structures: B) and D) (Fig. 1)
The right dimer structures are the ones with the right intermolecular bonding interaction. In this case we will have hydrogen bonding. This type of interaction is due to the negative polarization in oxygen and the positive polarization in hydrogen. (Figure 2)
Thus, a proper dimer structure is posible if we interact from the negative part (oxygen) to the positive part (hydrogen). B and D. are the only structures that have such interactions