L. Lee et al., SYNTHESIS, X-RAY CRYSTAL-STRUCTURE, AND REACTIVITY OF Y(MAC)(CH2SIME3)(2) (MAC EQUALS DEPROTONATED AZA-18-CROWN-6), Organometallics, 16(9), 1997, pp. 1819-1821
The yttrium dialkyl trans-Y(MAC)(CH2SiMe3)(2) (1; MAC = deprotonated a
za-18-crown-6) has been isolated and characterized (NMR and X-ray). Co
mplex 1 exhibits high stability toward ligand redistribution and metal
ation, reacts with CO to form a trans-bis-(enolate) by silyl migration
, and undergoes alkyl abstraction by B(C6F5)(3) to generate the highly
unstable cation [Y(MAC)(CH2SiMe3)](+)[B(C6F5)3(CH2SiMe3)](-), in situ
.