1332503-57-7

Upstream product

• 109-99-9 tetrahydrofuran 
• 16853-85-3 lithium aluminium tetrahydride 
• 1145-01-3 3,5-Diphenylpyrazole 
• 1332503-55-5 [Li(tetrahydrofuran)2][Al(hydride)2(3,5-diphenylpyrazolate)2] 

Downstream Products

• 1332503-65-7 [Zn(Al(hydride)(3,5-diphenylpyrazolate)3)(hydride)] 
• 7439-89-6 iron 
• 7440-02-0 nickel 
• 7439-96-5 manganese 

Relevant academic research and scientific papers

Poly(pyrazolyl)aluminate complexes containing aluminum-hydrogen bonds

The treatment of LiAlH4 with 2, 3, or 4 equiv of the 3,5-disubstituted pyrazoles Ph2pzH or iPr2pzH afforded [Li(THF)2][AlH2(Ph2pz)2] (97%), [Li(THF)][AlH(Ph2pz)3] (96%), [Li(THF)4] [Al(Ph2pz)4] (95%), and [Li(THF)][AlH(iPr 2pz)3] (89%). The treatment of ZnCl2 with [Li(THF)][AlH(Ph2pz)3] afforded Zn(AlH(Ph 2Pz)3)H (70%). X-ray crystal structures of these complexes demonstrated κ2 or κ3 coordination of the aluminum-based ligands to the Li or Zn ions. The treatment of [Li(THF)][AlH(Ph2pz)3] with MgBr2 or CoCl 2 in THF/Et2O solutions, by contrast, afforded the pyrazolate transfer products Mg2Br2(Ph2pz) 2(THF)3·2THF (25%) and Co2Cl 2(Ph2pz)2(THF)3·THF (23%) as colorless and blue crystalline solids, respectively. An analogous treatment of [Li(THF)][AlH(Ph2pz)3] with MCl2 (M = Mn, Fe, Ni, Cu) afforded metal powders and H2, illustrating hydride transfer from Al to M as a competing reaction path.