(Cyclopentadienylamine)scandium(2,3-dimethyl-1,3-butadiene): A 1,3-diene complex of scandium with Sc(I)- and Sc(III)-like reactivity

The scandium 2,3-dimethyl-1,3-butadiene complex [eta(5),eta(1)-C5H4(CH2)(2)NMe2]Sc(C6H10) (2) reacts with PhCN via initial nitrile insertion into the Sc-diene bond to give a dimeric mu(2)-imido species, but with a 2,2'-bipyridine via the elimination of the free diene. The latter shows that 2 can be used to generate the reactive fragment [eta(5),eta(1)-C5H4(CH2)(2)NMe2]Sc-I.