58669-32-2Relevant academic research and scientific papers
Synthesis, structural characterization and chromotropism of a copper(II) complex containing a bidentate ligand
Golchoubian, Hamid,Tarahomi, Mahbobeh,Rezaee, Ehsan,Bruno, Giuseppe
, p. 635 - 642 (2015)
A new coordination compound, [Cu(L)2(OH2)](ClO4)2 where L = N-(pyridin-2-ylmethyl)propane-2-amine, was prepared and characterized by elemental analysis, molar conductance and IR and UV-Vis spectroscopic techniques. X-ray crystal analysis of the complex confirmed that the copper(II) ion has a distorted square pyramidal environment. The complex is chromotropic in solution. The chromotropic properties of the complex, including solvato-, thermo-, halo- and ionochromism, were investigated in detail. The complex displayed strongly pronounced reversible thermochromism in solution due to dissociation and of re-coordination of a water molecule.
Study on the Structure, Thermodynamic property, and Fluorescence of Pyridin-2-ylmethyl-tert-butylamine Dimethyl aluminum complex
Liu, Ruiyuan,Yang, Shuyan,Ding, Yuqiang
, p. 1096 - 1101 (2021)
Pyridin-2-ylmethyl-tert-butylamine dimethyl aluminum complex with a planar five-membered ring was synthesized and characterized by elemental analysis, UV-Vis spectra, TG/DSC, 1H NMR, and 13C NMR. Through single-crystal diffraction, it is proved that the structure of the alkyl aluminum complex is a planar five-membered ring. By comparison the crystal data of 11 kinds of five-membered ring dialkyl aluminum complexes, we found that the planar five-membered ring dialkyl aluminum is formed when there is at least one unequal sp2 hybrid nitrogen in the ligand. TG/DSC study of the compound′s thermodynamic properties showed the thermal decomposition temperature of complex 7 was determined to be 210 °C. The rigid plane structure of the product was proved by fluorescence analysis. When the excitation wavelength was 380 nm, the emission wavelength was 478 nm.
Reductive Transformations of Carbonyl Compounds Catalyzed by Rhodium Supported on a Carbon Matrix by using Carbon Monoxide as a Deoxygenative Agent
Yagafarov, Niyaz Z.,Usanov, Dmitry L.,Moskovets, Alexey P.,Kagramanov, Nikolai D.,Maleev, Victor I.,Chusov, Denis
, p. 2590 - 2593 (2015/09/15)
An efficient method for the rhodium on carbon matrix catalyzed preparation of secondary and tertiary amines, cyanoesters, and nitriles through the reductive amination/alkylation of carbonyl compounds was developed, including a convenient procedure for the tandem formal reductive addition of acetonitrile to aldehydes. The catalyst could be reused, and at least three consecutive reaction cycles were performed with comparable efficiency. The method was shown to be compatible with functional groups prone to reduction by hydrogen and complex hydrides. Beyond the matrix: An efficient method for the rhodium on carbon matrix catalyzed preparation of secondary and tertiary amines, cyanoesters, and nitriles through the reductive amination/alkylation of carbonyl compounds is developed, including a convenient procedure for the tandem formal reductive addition of acetonitrile to aldehydes. TON=turnover number.
Synthesis, structural characterization and chromotropism of a copper(II) complex containing a bidentate ligand
Golchoubian, Hamid,Tarahomi, Mahbobeh,Rezaee, Ehsan,Bruno, Giuseppe
, p. 635 - 642 (2015/02/19)
A new coordination compound, [Cu(L)2(OH2)](ClO4)2 where L = N-(pyridin-2-ylmethyl)propane-2-amine, was prepared and characterized by elemental analysis, molar conductance and IR and UV-Vis spectroscopic techniques. X-ray crystal analysis of the complex confirmed that the copper(II) ion has a distorted square pyramidal environment. The complex is chromotropic in solution. The chromotropic properties of the complex, including solvato-, thermo-, halo- and ionochromism, were investigated in detail. The complex displayed strongly pronounced reversible thermochromism in solution due to dissociation and of re-coordination of a water molecule.
Synthesis, structures of (aminopyridine)nickel complexes and their use for catalytic ethylene polymerization
Lin, Ya-Chi,Yu, Kuo-Hsuan,Lin, Ya-Fan,Lee, Gene-Hsiang,Wang, Yu,Liu, Shiuh-Tzung,Chen, Jwu-Ting
scheme or table, p. 6661 - 6670 (2012/08/08)
A series of α-aminopyridines in the form of (2,6-C6H 3N)(R1)(CHR2NR3R4) (R1 = R2 = H R3 = H R4 = iPr (L1a), R4 = tBu (L1b), R4 = Ph (L1c), R4 = 2,6-Me2C6H3 (L1d), R4 = 2,6-iPr2C6H3 (L1e), R1 = R2 = H R3 = R4 = Et (L1f), R1 = H R2 = Me R3 = H R4 = iPr (L2a), R4 = Ph (L2c), R4 = 2,6-Me 2C6H3 (L2d), R4 = 2,6- iPr2C6H3 (L2e), R1 = Me R2 = H R3 = H R4 = 2,6-iPr 2C6H3 (L3e)) and β-aminopyridines in the form of (2-C6H4N)(CH2CH2NR 1R2) (R1 = H R2 = iPr (4a), R2 = tBu (L4b), R1 = R2 = Et (L4f)) have been prepared. Their corresponding halonickel complexes 1a-4f are synthesized by ligand substitution from (DME)NiBr2 and the molecular structures are characterized. Four types of coordination modes include four-coordinate mononuclear species with one ligand, five-coordinate mononuclear species with two ligands, five-coordinate dinuclear species with two ligands, and a six-coordinate polymeric framework were determined by X-ray crystallography. Using methylaluminoxanes (MAO) as the activator, the nickel complexes can catalyze ethylene polymerization under moderate pressure and ambient temperature. The activity reaches 105 g PE mol-1 Ni h. The PE products with high branching and high crystallinity have M n ～ 103 with PDI 2.
Alternating ethylene-norbornene copolymerization catalyzed by cationic organopalladium complexes bearing hemilabile bidentate ligands of α-amino-pyridines
Lin, Ya-Chi,Yu, Kuo-Hsuan,Huang, Shou-Ling,Liu, Yi-Hung,Wang, Yu,Liu, Shiuh-Tzung,Chen, Jwu-Ting
supporting information; experimental part, p. 9058 - 9067 (2010/03/30)
Cationic methylpalladium complexes with hemilabile bidentate ligands of α-amino-pyridines, in the form of {[R1HNCR2H(o- C6H5N)]Pd(Me)(NCMe)}(BF4) (R1 = iPr, tBu, Ar R2 = H, Me) have been found to be effective precursors for catalytic copolymerization of ethylene and norbornene under mild conditions. The copolymer products exhibit predominant alternating microstructures which are evidenced by NMR and mass spectrometry as well as a kinetic analysis according to the Finman-Ross relationship.
Compounds with Bridgehead Nitrogen 52 -NMR Spectra and Stereochemistry of the 2-Alkylperhydroimidazolopyridines
Banting, Lee,Crabb, Trevor A.
, p. 696 - 706 (2007/10/02)
In contrast to perhydro-oxazolopyridine and perhydrothiazolopyridine, which adopt equilibria in CDCl3 solution at room temperature containing ca 70percent trans-fused conformers in equilibria with O- or S-inside cis-fused conformers, 2-alkylperhydroimidazolopyridines are found to adopt equilibria containing >98percent trans-fused conformers.Comparison of NMR parameters of 2-methylperhydroimidazolopyridine with those of the two isomers of 1,2-dimethylperhydroimidazolopyridine indicates an equilibrium for the former compound between the two trans-fused conformers, with ca 83percent of that conformation containing a transarrangement of nitrogen lone pairs of electrons.These observations are explained in terms of the generalized anomeric effect.KEY WORDS Perhydroimidazolopyridine Conformational equilibria 1H and 13C NMR
