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.
How Single Malt Whisky Is Made. For more than 500 years barley and water have been the basic ingredients for single malt Scotch whisky. Beside their rugged beauty, the Scottish highlands are characterised by the vast grain fields, especially during harvest season. Scotland has unique water.