Synthesis And Properties Of Aluminum, Tin Main-group Organometallic Compounds Containing N-donor Ligands

Recently, organometallic complexes have attracted chemists’attention because of theirexcellent proprieties, glamorous structures and extensive application in the catalysis，luminescence, electromagnetic and so on. Synthesis and structural characterization of maingroup organometallic compounds containing N-donor ligands remains a hot topic inorganometallic chemistry．This is due to their rich structural diversity, their potentialapplications in industrial catalytic systems，biochemical systems and material science.Three organometallic compounds with bis(amino)silane or Schiff base ligands weresynthesized and characterized by single-crystal X-ray diffraction structural analysis,1HNMR, IR spectra, elemental analysis, thermal analysis, and UV-vis absorption spectraproperties.LPh2H2(LPh2=Ph2Si(NDipp)2, Dipp=2,6-iPr2C6H3) which has large steric hindranceas starting material to react with1.0equiv of BuLi, then the resulting bulky chelatingPh2Si(LiNDipp)(NHDipp) was reacted with Me3SnCl in a1:1ratio, obtained monodentateheterotetraatomic complex [(η1-Ph2SiNDipp)NHDippSnMe3].With the aim to further investigate the synthesis, crystal structure, stability andproperties of two new aluminum hydrides with Schiff base ligands were studied. Thereactions of aluminum hydride with Schiff base ligands are quite different, when comparedwith that of the β-diketiminate ligand. Their C=N double bonds are reduced to C-N singlebonds. The reason for this different behavior might be due to the conjugation of the C=Nwith the C=C double bond in the β-diketiminate ligand. The additions of aluminum hydrideto C=N double bonds are accompanied of the hydrides turning to protons. Meanwhile, thecore structure of compound from anilido–imine ligand turns to an aluminum containingsix-membered ring under elimination of H2. This is attributed to the sufficient reactivity ofthe second hydride at the same Al center to interact with the other proton of the ligandunder elimination of H2. This particular reduction-addition reactions can help us to wellexplain these series of reaction mechanism, and provide a new method for the preparationof main group metal compounds.