The Mukaiyama reaction uses one of these, titanium tetrachloride, and asymmetric ones allow for diastereoselective aldol formation. Their strength is generally positively correlated to charge density, and zinc can act as either an oxygen or a carbon bound one in enolates. Carbenium, like the best known example, is called a "Lobe-LUMO" one, and they are classified, like their counterparts, as hard or soft. They include boron trifluoride because of its unfilled p orbital, but they also trivially i
The Mukaiyama reaction uses one of these, titanium tetrachloride, and asymmetric ones allow for diastereoselective aldol formation. Their strength is generally positively correlated to charge density, and zinc can act as either an oxygen or a carbon bound one in enolates. Carbenium, like the best known example, is called a "Lobe-LUMO" one, and they are classified, like their counterparts, as hard or soft. They include boron trifluoride because of its unfilled p orbital, but they also trivially include H+. FTP, name these compounds defined as electron acceptors.
The Mukaiyama reaction uses one of these, titanium tetrachloride, and asymmetric ones allow for diastereoselective aldol formation.
{Lewis acid}