Amine-boranes reactions promoted by lanthanide(ii) ions

The catalytic activity in amine-borane dehydrogenation is shown for the first time for Ln(ii) species using complexes [{(p-tBu-C6H4)(2)CH}(2)M center dot L] (M = Yb, Sm, L = (DME)(2), TMEDA). The protonation of M(ii)-C bonds with (HNRRBH3)-R-1-B-2 affords amidoborane complexes [M((NRRBH3)-R-1-B-2)(2)L], which under excess HNMe2BH3 transform to [NMe2BH2NMe2BH3](-) derivatives, both serving as the dehydrocoupling intermediates.

Automated summary

The catalytic activity of Ln(II) species in amine-borane dehydrogenation was observed for the first time using specific complexes, generating dehydrocoupling intermediates.