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Synthesis, Structures of Guanidinate and Triazapentadienyl Complexes

Author: SongYanPing
Tutor: ZhouMeiSu
School: Shanxi University
Course: Organic Chemistry
Keywords: 1,3,5 - triaza pentadiene metal compound 1,3 - diaza- allyl metal compound Guanidines Synthesis Structure
CLC: O621.3
Type: Master's thesis
Year: 2008
Downloads: 70
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Abstract


This thesis involved research work is expanded around a series of new nitrogen-containing ligands, the aniline and 2,6 - diisopropylaniline as a starting material, with no α-H of the nitrile (alpha-hydrogen-free nitriles) addition reaction occurs on the basis of, using the classical synthesis method of metal organic compound 10 unreported. The main contents include: metal complexes of the novel 1,3 - diaza-allyl (1,3-diazaallyls) metal complexes and novel 1,3,5 - triaza-pentadiene (1,3,5-triazapentadienyl) Synthesis and structural studies, the compounds synthesized text using nuclear magnetic resonance (NMR), elemental analysis (EA) and X-ray single crystal diffraction (Single Crystal X-rayDiffraction) were characterized. The first chapter is an introduction, detailed description of the research background and significance of the work of the papers. Includes four parts: Introduction; compounds About aza-β-diimine ligands, structure, synthetic methods; guanidines About Synthesis; guanidine compounds and prospects. The second chapter discusses this topic in ligand PhN (Li) the SiMe 3 nitrile occurred the (L 1 ) α-H moles added into the reaction obtained novel asymmetric guanidine complexes 1a, 1b (Scheme 1) by NMR, elemental analysis and X-ray single crystal diffraction them structural analysis; nitrile steric effect on the structure of the target compounds; first time synthesized asymmetric guanidino rare earth metal compound. The third chapter discusses this topic in ligand PhN (Li) SiMe 3 (L 1 ) and ligands (Dipp) N (Li) the SiMe 3 < / sub> (Dipp = 2,6 - i Pr 2 -C 6 H 3 ) (L < sup> 2 ) and α-H of the nitrile to 1:2 in an addition reaction, obtained in a range of 2,4 - guanidino substituted aza-β-diimine compounds of the transition metals (including Mn metal compounds such as Fe, Co, Ni, Cu, see Scheme 2 and Scheme 3) by NMR, elemental analysis and X-ray single crystal diffraction structural characterization and analysis of 2a-2g; examine different ligand metal ligand skeleton. The fourth chapter ligand PhN (Li) SiMe this paper after addition of 1:2, the 3 (L 1 ) and α-H nitrile Cu (Ⅱ) catalyzed ring-closing reaction (Scheme 4) and structural studies. First discovered the 3,5 - disubstituted 1,2,4 - triazole compounds, new environmentally friendly synthesis pathway. Scheme 1 Reagents and conditions: i Me 2 NCN, Et 2 O, ca. -78 ℃; ii YCl 3 , THF / Hex, ca. -78 ℃; iii Bu t CN, Et 2 O, ca. -78 ℃; iv Me 2 NCN, Et 2 O, ca. -78 ℃; TMEDAScheme 2 Reagents and conditions: i 2Me 2 NCN, Et 2 O, ca. -78 ℃; ii MnCl 2 , Et 2 O, ca.-78 ℃; iii FeCl 2 , Et 2 O, ca . -78 ℃; iv CoCl 2 , Et 2 O, ca. -78 ℃; v NiCl 2 . 6H 2 < / sub> O, Et 2 O, ca. -78 ℃. Scheme 3 Reagents and conditions: i 2Me 2 NCN, Et 2 O , ca. -78 ℃; ii H 2 O, rt, ca. 25 ℃; iii CuCl / PPh 3 , Et 2 O, ca. -78 ℃; CH 2 Cl 2 (in N 2 ); iv CuCl, Et 2 O , ca. -78 ℃; CH 2 Cl 2 (in air). Scheme 4 Reagents and conditions: i 2Me 2 NCN, Et < sub> 2 O, ca. -78 ℃; ii CuCl 2 , Et 2 O, ca. -78 ℃ C.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Synthetic organic chemistry
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