Interaction of ammonia borane with Li2NH and Li3N

Abstract

Interaction of NH(3)BH(3) and Li(2)NH (or Li(3)N) in THF leads to the formation of NH(3) and LiNH(2)BH(3), which further react with each other and produce ca. 10 wt.% hydrogen at 45 degrees C.

Mechanistic Investigation on the Formation and Dehydrogenation of Calcium Amidoborane Ammoniate

“…[15] The above-mentioned process may be applicable to the formation of other metal amidoborane ammoniates, such as those of Mg and maybe even Li. Furthermore, such a facile proton transfer mechanism suggests that alternative routes for the synthesis of ammoniates of metal amidoboranes, that is, routes employing anion groups with stronger Lewis basicity, such as N 3À (nitride) or NH À (imide) to react with AB, may also be favorable.…”

“…The mechanism of formation and decomposition of calcium amidoborane ammoniate has been elucidated by using 15 Experimental Section AB (97 % purity) was obtained from Aldrich. Anhydrous 15 NH 3 and ND 3 were obtained from Spectra Gases (99 atom %).…”

Development of amidoboranes for hydrogen storage

“…On the other hand, calculations from Lee and Mckee 52 by using (LiH) 4 cluster to model its interaction with AB, gave an activation barrier of 12.4 kcal mol À1 for the same reaction, which is close to the experimental value of 11.1 kcal mol À1 determined from the reaction of LiH and AB in THF. 44 In addition to MABs from hydrides-AB interactions LiAB and NaAB can also be synthesized through the reaction of AB and amides of Li [60][61][62] and Na, 45 imide or nitride of Li 63 in THF solution, respectively. In those reactions, LiAB or NaAB was formed concomitantly with the emission of NH 3 as a result of metathesis between metal on amide or imide or nitride and H + on AB.…”

Metathesis of alkali-metal amidoborane and FeCl3 in THF

“…H 2 (10.9 and 7.5 wt%, respectively), with no emission of detectable borazine. Over the next few years, other hydrides 11,12 or hydride mixtures 13,14 and even amides, 10,15 imides, nitrides 16,17 were employed to interact with AB to form diverse amidoboranes. [22][23][24] which were the products of metathesis between LiBH 4 (or NaBH 4 ) and halides that contain desired central halide ions.…”