1324007-47-7Relevant academic research and scientific papers
Stoichiometric reactivity of dialkylamine boranes with alkaline earth silylamides
Hill, Michael S.,Hodgson, Marina,Liptrot, David J.,Mahon, Mary F.
experimental part, p. 7783 - 7790 (2011/09/30)
Reactions of β-diketiminato group 2 silylamides, [HC{(Me)CN(2,6- iPr2C6H3)}2M(THF) n{N(SiMe3)2}] (M = Mg, n = 0; M = Ca, Sr, n = 1), and an equimolar quantity of pyrrolidine borane, (CH2) 4NH·BH3, were found to produce amidoborane derivatives of the form [HC{(Me)CN(2,6-iPr2C 6H3)}2MN(CH2)4· BH3]. In reactivity reminiscent of analogous reactions performed with dimethylamine borane, addition of a second equivalent of (CH2) 4NH·BH3 to the Mg derivative induced the formation of a species, [HC{(Me)CN(2,6-iPr2C6H 3)}2Mg{N(CH2)4 BH 2NMe2BH3}], containing an anion in which two molecules of the amine borane substrate have been coupled together through the elimination of one molecule of H2. Both this species and a calcium amidoborane derivative have been characterised by X-ray diffraction techniques and the coupled species is proposed as a key intermediate in catalytic amine borane dehydrocoupling, in reactivity dictated by the charge density of the group 2 centre involved. On the basis of further stoichiometric reactions of the homoleptic group 2 silylamides, [M{N(SiMe3)2} 2] (M = Mg, Ca, Sr, Ba), with (CH3)2NH· BH3 and iPr2NH·BH3 reactivity consistent with successive amidoborane β-hydride elimination and [R 2NBH2] insertion is described as a means to induce the B-N dehydrocoupling between amine borane substrates.
