Regioselectivity

However, when the researchers tethered a silyl ether-a group containing silicon, oxygen, and hydrocarbon atoms-to the end of the triple-bonded carbon substrate, the carbometalation proceeded with extremely high regioselectivity; over 99% of the final product was isolated as a single chemical isomer. ❋ Unknown (2010)

What is difficult, though, is controlling the regioselectivity of the catalytic addition-the precise positions where the organic and metal units add to the unsaturated carbon bonds. ❋ Unknown (2010)

Further experiments revealed that the combination of a silyl ether tether group and a scandium-based catalyst enabled controllable carbometalation on numerous unsaturated organic molecules-in many cases, with higher regioselectivity than any other catalyst. ❋ Unknown (2010)

When the team first attempted carbometalation with the scandium catalyst and a typical triple-bonded carbon molecule, it achieved only moderate regioselectivity, similar to other transition metal catalysts. ❋ Unknown (2010)

A comparison of regioselectivity and rate of con - version with calculated molecular orbital substrate characteristics. ❋ [email protected](arab2000.forum (2009)

2153-2161 (1985) [13] Schwab, J.M.; Li, W.; Thomas, L.P.: Cyclohexanone oxygenase: stereochem - istry, enantioselectivity, and regioselectivity of an enzyme-catalyzed Baeyer-Villiger reaction. ❋ [email protected](arab2000.forum (2009)