Bifunctional iron-amino complexes: Highly efficient catalysts for dehydrogenation of ammonia-borane
Three iron complexes having bidentate 1-(2-aminophenyl)-substituted imidazol-2-ylidene ligands were synthesized by reactions of Cp?FeN(SiMe3)2 (Cp?: η5-C5Me5) with the corresponding imidazolium iodides. These iron complexes exhibited high catalytic performance for dehydrogenation of ammonia-borane in the presence of KN(SiMe3)2. The structure of an active species was determined by its NMR and high-resolution mass spectra and also by isolation of its CO adduct.
Syntheses of the five 9,9-bis(n-butyl)dibenzostannoles are reported, which are each symmetrically disubstituted by two F3C-, CH3O-, (CH3)3C-substituents in the 3- and 6-positions or by two F3C-, CH3O-substituents in the 2- and 7-positions of the benzo rings.