658706-17-3Relevant academic research and scientific papers
A bulky chelating diamidoaluminum monohydride - Synthesis, structure and reactions with Me3SnF and heavy group 16 elements
Zhu, Hongping,Chai, Jianfang,Roesky, Herbert W.,Noltemeyer, Mathias,Schmidt, Hans-Georg,Vidovic, Denis,Magull, Joerg
, p. 3113 - 3119 (2007/10/03)
The bulky chelating diamidoaluminum monohydride [ArN(CH2) 3NAr]AlH(NMe3) (Ar = 2,6-iPr2C 6H3; 1) was prepared in excellent yield from the reaction of the diamine ArNH(CH2)3HNAr with a small excess of AlH3·NMe3 in toluene. Subsequent fluorination of 1 with Me3SnF resulted in the formation of the aluminum monofluoride [ArN(CH2)3N-Ar]AlF(NMe3) (2). Reaction of 1 with elemental E (E = S, Se and Te) proceeded in toluene with heating to yield the aluminum chalcogenides {[ArNH(CH2)3NAr]Al(μ -E)}2 [E = S (3), Se (4), and Te (5)]. The structures of complexes 1, 2 and 4 have been determined by X-ray diffraction analyses. Compounds 1 and 2 are well-separated monomers with a central aluminum atom in a tetrahedral environment. The diamide ligand [ArN(CH2)3NAr] 2- chelates the Al atom to form a distorted six-membered AlN 2C3 ring which features a boat conformation for 1 and a flattened chair conformation for 2. Compound 4, however, is a dimer with a central Al2Se2 core bearing an ideal four-membered planar ring and two six-membered AlN2C3 rings, both displaying a boat conformation. The latter two rings are arranged perpendicularly to the Al2Se2 core in a trans configuration. The IR spectra and 1H NMR spectroscopic data of compounds 3-5 suggest that the migration of the hydrogen from selenium to one of the nitrogens at the diamide ligand is involved in the course of the reaction. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
