Studies On The Synthesis And Structure Of 1,3,5-triazapentadienato Main Group, Transition Metal Compounds

The study is to the 1,3,5-triazapentadienato main group, transition metal compounds. PhN(Li)SiMe3(L1), (Dipp)N(Li)SiMe3 (L2,Dipp =2,6-iPr2-C6H3) were used as raw materials to react with dimethylcyanamide and obtained 1,3,5-triazapentadienato-lithium compounds, then reacted with metal chlorides and led ro the corresponding metal complexes. Our group synthesized six new compounds which were investigated by analysis methods like NMR, elemental analysis and X-ray single crystal diffraction. The thesis included the following three chapters.Chapter 1. The background of this research. It was divided into three sections:(1) introduction (2) development, synthetic method and applications and outlooks of guanidinates (3) development, brief introduction, synthetic method and outlooks of 1,3,5-triazapentadienato complexes (4) purpose and significance of the topic.Chapter 2. The reaction of PhN(Li)SiMe3(L1) with dimethylcyanamide at the ratio of 1:2 and then with SnCl2 led to complex 2a (Scheme 1). Complex 2a was analyzed by X-ray single crystal diffraction and elemental analysis. Reagents and congditions:i (Me)2NCN5 SnCl2, Et2O, ca.-78℃.Chapter 3. The reactions of PhN(Li)SiMe3(L1) or (Dipp)N(Li)SiMe3(L2) with dimethylcyanamide, led to a series of novel 1,3,5-triazapentadienato complexes [including Hf, Co, Ni, Cu(I) complexes, Scheme 2]. Complexes were analyzed by elemental analysis, X-ray single crystal diffraction and 1H NMR,13C NMR[except Co,Cu(Ⅰ)]. Reagents and congditions:ⅰ 2Me2NCN,1/2HfCl4, Et2O, ca.-78℃; CH2C12; ⅱ 2Me2NCN, CoCl2, Et2O, ca.-78℃; CH2C12;ⅲ 2Me2NCN,1/2CoCl2, Et2O, ca.-78℃; ⅳ 2Me2NCN, 1/2NiCl2-6H2O, Et2O, ca.-78℃; CH2C12;ⅴ 2Me2NCN, CuCl\PPh3; Et2O, ca.-78℃.