Table 1. A comparison of [(C₅Me₅)Sc(CH₂C₆H₄NMe₂-o)₂] and [Sc(CH₂C₆H₄NMe₂-o)₃] as catalysts.

^a Reactions were carried out with 0.25 mmol amine and 0.275 mmol norbornene in 1 mL of C₆D₆.

^b NMR yield calculated against Cp₂Fe as an internal standard.

^c 10 mol% of co-catalysts used.