60619-50-3Relevant articles and documents
Intermediates in the formation of N-methylaminoborane trimer and N,N-dimethylaminoborane dimer
Beachley Jr.
, p. 870 - 874 (1967)
Experimental evidence for the intermediates in the formation of N-methylaminoborane trimer, (H2BNHCH3)3, and N,N-dimethylaminoborane dimer, (H2BN(CH2)2)2, has been obtained by synthetic methods and trapping procedures. The pyrolysis of methylamine borane, H3BNH2CH3, yields the six-membered ring of (H2BNHCH3)3 by initially forming H2B(NH2CH3)2+BH 4-, then [H2CH3NBH2NHCH3BH2NH 2CH3]+BH4- through a series of successive dehydrogenation condensation reactions. The final step of the proposed mechanism is ring closure by dehydrogenation. The new compound, [H2CH3NBH2NHCH3BH2NH 2CH3]+Cl-, was prepared by heating a mixture of H2B(NH2CH3)2+Cl - and H3BNH2CH3 and was characterized by elemental analysis, its reactions with FeCl3 and NaBH4, and its pmr spectrum. The experimental evidence for the intermediates during the pyrolysis of dimethylamine borane to form (H2BN(CH3)2)2 is consistent with monomeric H2BN(CH3)2 species which then associate to give the dimer.
Catalytic redistribution and polymerization of diborazanes: Unexpected observation of metal-free hydrogen transfer between aminoboranes and amine-boranes
Robertson, Alasdair P. M.,Leitao, Erin M.,Manners, Ian
, p. 19322 - 19325 (2012/01/13)
Ir-catalyzed (20 °C) or thermal (70 °C) dehydrocoupling of the linear diborazane MeNH2-BH2-NHMe-BH3 led to the formation of poly- or oligoaminoboranes [MeNH-BH2]x (x = 3 to >1000) via an initial redistribution process that forms MeNH 2?BH3 and also transient MeNH=BH2, which exists in the predominantly metal-bound and free forms, respectively. Studies of analogous chemistry led to the discovery of metal-free hydrogenation of the B=N bond in the "model" aminoborane iPr2N=BH2 to give iPr2NH?BH3 upon treatment with the diborazane Me3N-BH2-NHMe-BH3 or amine-boranes RR′NH?BH3 (R, R′ = H or Me).
Amino-borane oligomers bound to a Rh(I) metal fragment
Dallanegra, Romaeo,Chaplin, Adrian B.,Tsim, Jennifer,Weller, Andrew S.
, p. 3092 - 3094 (2010/07/06)
Coordination complexes of previously observed intermediates, H 3B·NMe2BH2·NMe2H and [H2BNMeH]3, in the transition metal catalysed dehydrocoupling of H3B·NMe2H and H 3B·NMeH2 have been isolated and structurally characterised using the [Rh{PR′2(η2-C 5H7)}]+ fragment. Their onward reactivity shows that further dehydrogenation is not a simple intramolecular process. The Royal Society of Chemistry 2010.
