| Due to the importance of transition-metal complexes containing diatomic chalcogen ligands X2 in oxidation processes of biological and catalytic systems,a vast number of complexes containing peroxo(O22-)as well as persulfido?disulfido?(S22-)have been researched.Up to now,the tructure-reactivity studies of a vast number of complexes containing one or more X2 units by a“side-on” or “end-on” coordination mode have also been studied.Besides,under the condition of laser excitations and low temperatures,Diatomic XY-defects?X,Y = O,S,Se?in solid state physics in chalcogen doped alkali halide lattices exhibit an extremely intense behavior of superfluorescence.Thus it has attracted much attention in material chemistry to develop complexes containing chalcogen ligands.Small molecules?O2,S,Se?activating reactions follow the principle of efficient uses in green chemistry.However,the reports of the reactions between ?-diketiminatolithium compounds and small molecules?O2,S,Se?are few.Based on the above contents,a series of related research work have been carried out and were outlined as follows:Chapter 1,introducion the development background of this subject:?1?research progress of organic selenium compounds;?2?research progress of organic sulfide compounds;?3?research progress of organic oxygen compounds.Chapter 2,small molecules?O2,S,Se?activating reactions by ?-diketiminatolithium compounds were studied.It's quite remarkable that the products varied depending on the different molar radio of reactants?the molar radio = ?-dikeminato ligand : nBuLi : selenium?,and four novel organoselenium compounds SeC{C?H??2,6-iPr2C6H3N?}2Li·THF]2?2e??[SeC{C?H??2,6-iPr2C6H3N?Li}2·3THF]2?2f??[Se{C{C?H??2,6-iPr2C6H3N?}2 Li·THF}2]?2g?and [SeC{C?H??2,6-Me2C6H3N?}2·SeC{C?H??2,6-Me2C6H3N?}2Li·THF]?2h?were isolated.All of the complexes were characterized by single crystal X-ray structural data.The 1H,13 C,7Li and 77 Se spectra in C6D6 of complexes had also been supplied.Chapter 3,small molecules?O2,S,Se?activating reactions by ?-diketiminatolithium compounds were studied.It's quite remarkable that the products varied depending on the different molar radio of reactants?the molar radio = ?-dikeminato ligand : nBuLi : sulfur?,and four novel organosulfur compounds [C{?CMe??2,6-iPr2C6H3N?}2SLi]2?3b??[C{?CMe??2,6-iPr2C6H3N?}2S2Li2]2·[C{?CMe??2,6-iPr2C6H3N?}2S2LiBu]2?3c??[C{?CMe??2,6-iPr2C6H3N?}2S2Li]4·Li4O?THF?2]?3d?and [SC{C?H??2,6-iPr2 C6H3N?}2Li·THF]2?3e?were isolated.All of the complexes were characterized by single crystal X-ray structural data.The 1H,13 C and 7Li spectra in C6D6 of complexes had also been supplied.Chapter 4,small molecules?O2,S,Se?activating reactions by ?-diketiminatolithium compounds were studied.Two novel organic oxygen compounds [OC?CMe??2,6-iPr2C6H3N?]?4a??[OOC?CMe??2,6-iPr2C6H3N?]?4b?were isolated.All of the complexes were characterized by single crystal X-ray structural data. |
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