TY - JOUR
T1 - Synthesis, characterization and reactivity of an imidazolin-2-iminato aluminium dihydride
AU - Franz, Daniel
AU - Irran, Elisabeth
AU - Inoue, Shigeyoshi
PY - 2014/3/21
Y1 - 2014/3/21
N2 - The reaction of bis(2,6-diisopropylphenyl)imidazolin-2-imine (LH, 1) with Me3N·AlH3 furnishes {μ-LAlH2} 2 (2). The marked tendency of 2 to release its hydride substituents is ascribed to the strong electron-donor character of the imidazolin-2-iminato ligand. This is supported by its reactivity study and DFT calculations. In fact, compound 2 was further converted with Me3SiOTf, Me 2S·BH3, Me2S·BBr3, and BX3 (with X = Cl, Br, and I) into {μ-LAl(H)OTf}2 (3), {μ-LAl(BH4)2}2 (4), and {μ-LAlX 2}2 (5, X = Br; 6, X = Cl; 7, X = I), respectively. For all new aluminium complexes the formulation as dimers was evidenced by high resolution mass spectrometry, as well as single-crystal X-ray diffraction analysis. A prominent structural motif of these compounds is the square-planar four-membered Al2N2 ring with two bridging bulky imidazolin-2-imino moieties.
AB - The reaction of bis(2,6-diisopropylphenyl)imidazolin-2-imine (LH, 1) with Me3N·AlH3 furnishes {μ-LAlH2} 2 (2). The marked tendency of 2 to release its hydride substituents is ascribed to the strong electron-donor character of the imidazolin-2-iminato ligand. This is supported by its reactivity study and DFT calculations. In fact, compound 2 was further converted with Me3SiOTf, Me 2S·BH3, Me2S·BBr3, and BX3 (with X = Cl, Br, and I) into {μ-LAl(H)OTf}2 (3), {μ-LAl(BH4)2}2 (4), and {μ-LAlX 2}2 (5, X = Br; 6, X = Cl; 7, X = I), respectively. For all new aluminium complexes the formulation as dimers was evidenced by high resolution mass spectrometry, as well as single-crystal X-ray diffraction analysis. A prominent structural motif of these compounds is the square-planar four-membered Al2N2 ring with two bridging bulky imidazolin-2-imino moieties.
UR - http://www.scopus.com/inward/record.url?scp=84894437911&partnerID=8YFLogxK
U2 - 10.1039/c3dt52637b
DO - 10.1039/c3dt52637b
M3 - Article
AN - SCOPUS:84894437911
SN - 1477-9226
VL - 43
SP - 4451
EP - 4461
JO - Dalton Transactions
JF - Dalton Transactions
IS - 11
ER -