If the double bond is broken heterolytically, formal charge pairs result, as shown in the other two structures. The preferred charge distribution will have the positive charge on the less electronegative atom (carbon) and the negative charge on the more electronegative atom (oxygen).
Single malt Scotch. Single malt Scotch is single malt whisky made in Scotland. To be a single malt scotch the whisky must have been distilled at a single distillery using a pot still distillation process and made from a mash of malted grain. In Scotland, the only grain allowed to be used in a single malt whisky is barley.
In the 18th century commercial distilleries began introducing whisky made from wheat and rye whole grains, not malted. Barley, malted barley, rye, malted rye, wheat, and corn. Uniqueness. Producers 'malt' the barley grain to turn the starch into sugar prior to fermenting, giving Scotch its distinctive smooth flavor.