• Title/Summary/Keyword: $Cu^{2+}$ 착물

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Development of Ferrocene-Containing Metal Catalysts for Asymmetric Synthesis (페로센을 이용한 비대칭 유기합성용 금속 촉매의 개발)

  • Oh, Yunghee;Choi, Mi-Jin
    • Applied Chemistry for Engineering
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    • v.10 no.5
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    • pp.804-807
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    • 1999
  • New copper complexes with a ligand, L(L=N,N'-cyclohexane bis(ferrocenylmethylene)amine) which was obtained from ferrocene carboxaldehyde and 1,2-diaminocyclohexane with a mole ratio of 2:1, were prepared and characterized. Those were adapted to asymmetric catalysis. The copper(II) complexes do not work in cyclopropanation of styrene and ethyl diazoacetate but copper(I) complex catalyzes. The Cu(I)LOTf (OTf=trifluorometanesulfonate) shows a good regioselectivity giving high trans to cis ratio of up to 80:20.

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Spectrophotometric Study of Copper Complex of N-Benzylisonitrosoacetylacetone Imine (N-Benzylisonitrosoacetylacetone Imine의 구리착물에 대한 분광광도법적 연구)

  • Byung Kyo Lee;Dae Sub O;Heung Rak Lee
    • Journal of the Korean Chemical Society
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    • v.30 no.2
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    • pp.201-206
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    • 1986
  • A new analytical reagent N-benzylisonitrosoacetylacetone imine (H-IAA-N-Bz) has been synthesized and identified its structure by IR, NMR and mass spectra. H-IAA-N-Bz forms a copper chloroform-soluble complex in a basic aqueous solution (pH = 7.0∼10.0). The other optimum conditions for the spectrophotometric study of the copper complex have been determined at 420nm. Beer's law is obeyed below the concentration of 64$\mu$g of copper per 10ml of chloroform. The composition of the copper complex has been found to be $Cu(IAA-N-Bz)_2$ and the over-all stability constant is calculated to be $8.55 {\times} 10^6$. The molar absorption coefficient, $\varepsilon$ of the $Cu-(IAA-N-Bz)_2 $complex is 3500l/$cm{\cdot}mol$.

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Electrochemical Properties of Binuclear Tetradentate Schiff Base Cobalt(II), Nickel(II) and Copper(II) Complexes in Nonaqueous Solvents. (V) (비수용매에서 이핵성 네자리 Schiff Base Cobalt(II), Nickel(II) 및 Copper(II) 착물들의 전기화학적 성질 (제 5 보))

  • Chjo Ki-Hyung;Choi Yong-Kook;Lee Song-Ju;Kim Chan-Young;Rim Chae-Pyeong
    • Journal of the Korean Chemical Society
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    • v.36 no.5
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    • pp.709-719
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    • 1992
  • We synthesized the binuclear tetradentate Schiff base cobalt(II), nickel(II) and copper(II) complexes such as [Co(II)_2(TSBP)(L)_4], [Ni(II)_2(TSBP)(II)_4] and [Cu(II)_2(TSBP)] (TSBP: 3,3',4,4'-tetra(salicylideneimino)-1,1'-biphenyl, L: Py, DMSO and DMF). We identified the binucleated structure of these complexes by elemental analysis, IR-spectrum, UV-visible spectrum, T.G.A. and D.S.C. According to the results for cyclic voltammogram and differential pulse polarogram of 1 mM complexes in nonaqueous solvents included 0.1M TEAP-L (L; Py, DMSO and DMF) as supporting electrolyte, it was found that diffusionally controlled redox processes of four steps through with one electron for binucleated Schiff base Cobalt(II) complex was Co(III)_2 {^\longrightarrow \\_\longleftarrow^e^-}Co(III)Co(II)_2{^\longrightarrow \\_\longleftarrow^e^-}Co(II){^\longrightarrow \\_\longleftarrow^e^-}Co(I){^\longrightarrow \\_\longleftarrow^e^-}Co(I)_2 and two steps with one electron for Nickel(II) and Copper(II) complexes were M(II)_2 {^\longrightarrow \\_\longleftarrow^e^-}M(I)M(I){^\longrightarrow \\_\longleftarrow^e^-}M(I)_2 (M; Ni and Cu) in nonaqueous solvents.

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Complex Formation of 1,15-Diaza-3,4:12,13-dibenzo-5,8,11-trioxacycloheptadecane with Some Transition Metal Ions (전이금속이온과 1,15-Diaza-3,4:12,13-dibenzo-5,8,11-trioxacycloheptadecane과의 착물형성)

  • Cheul-Gyu Chang;Young-Kook Shin;Si-Joong Kim
    • Journal of the Korean Chemical Society
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    • v.30 no.6
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    • pp.526-531
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    • 1986
  • The stability constants of 1,15-diaza-3,4:12,13-dibenzo-5,8,11-trioxacycloheptadecane (NenOdien H$_4$, L) with transition metal ions such as $Co^{2+},\;Ni^{2+},\;Cu^{2+},\;and\;Zn^{2+}$ have been determined by potentiometry in 95% methanol solution at 25$^{\circ}$C. The complex formation of the NenOdien $_4$ with the transition metal ions depends on the basicity of the donor atoms. The order of complex stability was Co(II) < Ni(II) < Cu(II) > Zn(II). The geometries of the complexes in solid state were discussed by visible-near infrared and infrared spectrophotometry, elemental analysis and electro-conductivity. The results suggest that the geometries of the solid complexes are octahedral for $[CoL_2(OH_2)Cl]Cl{\cdot}2H_2O$, $[NiL_2(OH_2)Cl]Cl{\cdot}2H_2O$, and $[ZnLCl_2]{\cdot}\frac{1}{2}H_2O$ and square pyramidal for [CuLCl]Cl, respectively.

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The Effects of the cis and trans Configurations of Ligands on the Calculated Dipole Moments for $[M(II)O_3N_3]$ and $[Ni(II)O_2N_4]$ Type Complexes ($[M(II)O_3N_3]$$[Ni(II)O_2N_4]$ 형태착물의 쌍극자 모멘트에 대한 리간드의 cis 및 trans 구조의 영향)

  • Sangwoon Ahn;Eu Suh Park;Chang Jin Choi
    • Journal of the Korean Chemical Society
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    • v.27 no.2
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    • pp.83-94
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    • 1983
  • The effects of cis and trans configurations of ligands for $[M(II)O_3N_3]$ and $[Ni(II) O_2N_4]$ type complexes [M(II) = Co(III), Ni(II) and Cu(II)] on the calculated dipole moments have been investigated, adpoting the eigenvectors of EHT calculation. The calculated dipole moments for cis complexes are higher than those of trans complexes. The calculated dipole moments for the octahedral trans $[Co(III)O_3N_3]$ type complex fall in the range of experimental values. However the calculated dipole moments for cis $[Ni(II) O_2N_4]$ type complexes fall in the range of the experimental values. These results predicts the trans structure for $[Co(III)O_3N_3]$ and $[Ni(II) O_2N_4]$ type complexes. Those structures are in agreement with the experimental one (Three bidentate (O-N) ligands in $[M(II)O_3N_3]$ type complexes coordinate to the metal ion and two tridentate (O-N-N) ligands in [Ni(II)O2N4] type complexes coordinate to Ni(II) ion).

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Ag(Ⅰ) Ion Selective Macrocyclic Ligands: The Complexation and Liquid Membrane Transport Phenomena of Benzylated Nitrogen-Oxygen Donor Macrocyclic Ligands (Ag(Ⅰ) 이온 선택성을 갖는 거대고리 리간드: 벤질 치환기를 갖는 질소-산소 주개 거대고리 리간드의 착물 형성과 액체막 이동 현상)

  • Kim, Jeong;Ahn, Tae Ho;Lee, Myoung Ro;Cho, Moon Hwan;Kim, Si Joong
    • Journal of the Korean Chemical Society
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    • v.43 no.2
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    • pp.167-171
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    • 1999
  • An investigation of the interaction of Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Pb(II) and Ag(I) with two N,N'-dibenzylated nitrogen-oxygen mixed donor macrocyclic ligands, has been carried out. Tle log K values for the respective complexes in 95% methanol have been determined potentiometrically. Both ligands have formed stable complex with only Cu(II) and Ag(I) ion. Transport measurements in a bulk liquid membrane system exhibited a very high selectivity of Ag(I) ion over the other metal ions used.

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Electrochemical Properties of Binuclear Nickel(II) and Copper(II) Complexes with Tetradentate Schiff Base in Aprotic Solvents (1) (비수용매에서 이핵성 네자리 Schiff Base Nickel(II) 및 Copper(II) 착물들의 전기화학적 성질 (제 1 보))

  • Chjo Ki-Hyung;Choi Yong-Kook;Seo Seong-Seob;Lee Song-Ju
    • Journal of the Korean Chemical Society
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    • v.35 no.1
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    • pp.24-37
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    • 1991
  • We synthesized the binuclear Tetradentate Schiff base nickel(II) and copper(II) complexes ; [Ni(II)$_2$(SMPO)$_2$(L)$_2$], [Ni(II)$_2$(SPPD)$_2$(L)$_2$] and [Cu(II)$_2$(SMPD)$_2$] and [Cu(II)$_2$(SPPD)$_2$] (where, L : Py, DMSO and DMF). We identified the structure of these complexes by elemental analysis, IR-spectrum, T.G.A, D.S.C and ESR measurements. According to the results of cyclic voltammetry and DPP measurements in aprotic solvent included 0.1M TEAP as supporting electrolyte, we knew that diffusional controlled redox process of one step with one electron was irreversible process in 0.1M TEAP-Py solution. Also it was reversible or quasi reversible process in 0.1M TEAP-DMSO solution and reversible or E.C reaction mechanism in 0.1M TEAP-DMF solution at mononuclear complexes ; [Cu(II)(SOPD)] and [Ni(II)(SOPD)(L)$_2$]. But, we knew that diffusional controlled redox process of two step for one electron of binuclear complexes was as follows. The values of redox potential for dimeric complexes in 0.1M TEAP-L solution (where, L ; Py, DMSO and DMF) with scan rate 100mV/sec.

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Calculation of the Dipole Moment for Octahedral [Co(III)-$O_3N_3$], Tetrahedral [M(II)-$O_2N_2$] and Square Planner [M(II)-$O_2N_2$] Type Complexes [M(II) = Ni(II) or Cu(II)] (정팔면체 [Co(III)-$O_3N_3$], 정사면체 [M(II)-$O_2N_2$] 및 정사각형 [M(II)-$O_2N_2$] 형태 착물의 쌍극자모멘트의 계산 [M(II) = Ni(II) 또는 Cu(II)])

  • Ahn Sang Woon
    • Journal of the Korean Chemical Society
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    • v.22 no.5
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    • pp.295-303
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    • 1978
  • The dipole moments for octahedral [Co(III)-$O_3N_3$], tetrahedral [M(II)-$O_2N_2$] and square planar [M(II)-$O_2N_2$] types complexes are calculated by the expansion method for spherical harmonics using the valence basis sets for the central metal ion and the single basis set orbital ($2p_z$) for ligands. The calculated dipole moments for these complexes are in agreement with the experimental values.

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Studies on the Complexation of a Nitrogen-Oxygen Donor Macrocyclic Ligand with Transition Metal Ions in Dioxane-Water Mixed Solvent (물-다이옥산 혼합용매에서 $N_2O_2$계 거대고리 리간드와 전이금속이온과의 착물형성에 관한 연구)

  • Moon-Hwan Cho;Sang-Chul Lee;Si-Joong Kim
    • Journal of the Korean Chemical Society
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    • v.31 no.6
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    • pp.503-508
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    • 1987
  • The protonation constants of 3,4 : 9,10-dibenzo-1,12-diaza-5,8-dioxacyclotetradecane $(NenOenH_4)$ and stability constants of its transition metal complexes have been determined by the potentiometric titration in 1 : 1 dioxane-water mixture with 0.1 ionic strength at $25^{\circ}C.$ For a given anion system, the stabilitv constants of the complexes are in the order of $Mn^{2+}<\;Co^{2+}\;< Ni^{2+}\;<\;Cu^{2+}\;>\;Zn^{2+}$, which accords with the Williams-Irving series.

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The Effect of ${\pi}$ Bonds on the Calculated Dipole Moments for Tetrahedral and Square Planar [M(Ⅱ)$O_2S_2$] Type Complexes [M(II) = Co(II), Ni(II), Cu(II) and Zn(II)] (사면체 및 사각형 [M(II)$O_2S_2$]형태 착물의 쌍극자 모멘트에 대한 ${\pi}$결합의 영향 [M(II) = Co(II), Ni(II), Cu(II) 및 Zn])

  • Sangwoon Ahn;Jin Ha Park;Chang Jin Choi
    • Journal of the Korean Chemical Society
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    • v.26 no.5
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    • pp.265-273
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    • 1982
  • The effect of ${\pi}$ bonds on the calculated dipole moments for square planar and tetrahedral [M(II)$O_2S_2$]] type complexes has been investigated by two different approaches. One is the approximate molecular orbital method based on the assumption that the mixing coefficient CM of the valence basis sets for the central metal ion and the appropriate ligand orbitals is equal for all ${\sigma}$ and ${\pi}$ bonding molecular orbitals. The other is the more refined calculation based on the semiempirical LCAO-MO method. If ${\sigma}$ bonds only are assumed to be formed, the calculated dipole moments for square planar and tetrahedral complexes are lower than those of the experimental values. If the contribution of ${\pi}$ bonds to the calculated dipole moments are fully considered, the calculated dipole moments for both square planar and tetrahedral [M(II)$O_2S_2$]] type complexes are higher than the experimental values. However if ${\pi}$ bonds are assumed to be delocalzed, the calculated dipole moments for tetrahedral [M(II$O_2S_2$]] type complexes fall in the range of the experimental values, but those for square planar complexes deviate from the experimental values. These results suggest that [M(II)$O_2S_2$]] type complexes may have the tetrahedral structure in inert solvent solution. This structure is in agreement with the experimental one. The calculated dipole moments for tetrahedral [M(II)$O_2S_2$]] type complexes indicate that the contribution of ${\pi}$ bonds to the calculated dipole moments may not be neglected.

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