478971-10-7

Upstream product

• 16853-85-3 lithium aluminium tetrahydride 
• 244187-81-3 1,3-bis-(2,6-diisopropylphenyl)-imidazol-2-ylidene 
• 16842-00-5 trimethylamine alane 
• 124330-23-0 alane-N,N-dimethylethylamine complex 

Downstream Products

• 956972-09-1 ([1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene]BH₂)2 

Relevant academic research and scientific papers

Reactivity of NHC Alane Adducts towards N-Heterocyclic Carbenes and Cyclic (Alkyl)(amino)carbenes: Ring Expansion, Ring Opening, and Al?H Bond Activation

The synthesis of mono-NHC alane adducts of the type (NHC)?AlH3 (NHC=Me2Im (1), Me2ImMe (2), iPr2Im (3 and [D3]-3), iPr2ImMe (4), Dipp2Im (10); Im=imidazolin-2-ylidene, Dipp=2,6-diisopropylphenyl) and (NHC)?AliBu2H (NHC=iPr2Im (11), Dipp2Im (12)) as well as their reactivity towards different types of carbenes is presented. Although the mono-NHC adducts remained stable at elevated temperatures, ring expansion occurred when (iPr2Im)?AlH3 (3) was treated with a second equivalent of the carbene iPr2Im to give (iPr2Im)?AlH(RER-iPr2ImH2) (6). In 6, {(iPr2Im}AlH} is inserted into the NHC ring. In contrast, ring opening was observed with the sterically more demanding Dipp2Im with the formation of (iPr2Im)?AlH2(ROR-Dipp2ImH2)H2Al?(iPr2Im) (9). In 9, two {(iPr2Im)?AlH2} moieties stabilize the ring-opened Dipp2Im. If two hydridic sites are blocked, the adducts are stable with respect to further ring expansion or ring opening, as exemplified by the adducts (iPr2Im)?AliBu2H (11) and (Dipp2Im)?AliBu2H (12). The adducts (NHC)?AlH3 and (iPr2Im)?AliBu2H reacted with cAACMe by insertion of the carbene carbon atom into the Al?H bond to give (NHC)?AlH2/iBu2(cAACMeH) (13–18) instead of ligand substitution, ring-expansion, or ring-opened products.

Cationic aluminum hydride complexes: Reactions of carbene-alane adducts with trityl-borate

Reaction of (Idipp)AlH3 with [Ph3C][B(C6F5)4] in toluene affords the dimeric aluminum dication [((Idipp)AlH(μ-H))2][B(C6F5)4]22. In contrast, the

Thermal Decomposition of Aluminium Hydride Complexes with Trimethylamine and N-Heterocyclic Carbene

Abstract: The decomposition of aluminum hydride complexes with trimethylamine andN-heterocyclic carbene—1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene was studied by a statictensimetric method with a membrane null-manometer. TheAlH3·NMe3 complex passes intovapor in the form of monomeric molecules and in unsaturated vapor slowlydecomposes at 70?80°С into solid aluminum, gaseous trimethylamine, and hydrogen.The decomposition is accompanied by an induction period, the duration of whichdecreases as temperature increases. The AlH3 complex withcarbene slowly decomposes at 170?200°С with a rate practically independent oftemperature.

Structural and spectroscopic studies of carbene and N-donor ligand complexes of group 13 hydrides and halides

The syntheses of two Group 13 complexes of the sterically demanding carbene, 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene, (IPr), are reported, vis. [MX3(IPr)] M = Al, X = H; M = In, X = Br; both of which have been structurally characterise