Synthesis And Characterization Of Tetra-and Mono-nuclear 1,3,5-Triazapentadienyl Metal Complexes

In this paper, a series of different 1,3,5-triazapentadienyl ligands was synthesized by the reactions of bis(trimethylsilyl) amino lithium or aniline derivatives with a variety of cyanoamines free-fromα-hrdrogen. Based on the above, five novel metal compounds were obtained via the addition reactions between these ligands and metal halides. Their structures have been characterized by single crystal X-ray diffraction, 1H NMR,13C NMR spectra and elemental analysis. The thesis could be divided into the following three chapters.The first chapter is the introduction. The background konwledge and the purposes and siganificance of the research were described in detail. The following sections were included:(1) an overview of the organometallic chemistry; (2) intoduction on guanidinato,β-diketiminato and 1,3,5-triazapentadienyl ligands and their metal compounds; (3) synthesis, research developments and applications of guanidinate,β-diketiminate and 1,3,5-triazapentadienyl metal complexes.Chapter Two. A tetrameric copper(Ⅰ) compound [CuN(SiMe3)2]4 2a was obtained via the reaction of bis(trimethylsilyl) amino lithium LiN(SiMe3)2 and CuCl (Scheme 1) at ratio of 1:1 at -78℃. [R(NCR')2NSn]4 2b (Figure 1) was synthesized via the reaction between LiN(SiMe3)2 and RCN free-fromα-hrdrogen (R=1-piperidino) and then with SnCl2. Their structures were characterized by X-ray diffraction,1H NMR,13C NMR and elemental analysis. Moreover, the influences of the metal center on the reaction results were investigated.Chapter Three. Addition reactions of PhN(Li)SiMe3 and free-fromα-hrdrogen at ratio of 1:2 at -78℃, and then with ZnCl2 led to complexes Zn{N(C6H5)C(R)NC(R)NR'}2 3a andZn{N(C6H5)C(R")NC(R")NR'}2 3b, with SnCl4 gaveSn{N(C6H5)C(R)NC(R)NR'}2Cl2 3c, respectively (Figure 2). Complexes 3a,3b and 3c were characterized by 1H NMR,13C NMR, elemental analysis and X-ray diffraction. The ligand backbone in 3a and 3b adopted U-shaped conformation, in 3c, however, adopted both U- and W-shaped conformations.Scheme 1 Synthetic Route to Compound 2a Figure 1 Compound 2b...