• 제목/요약/키워드: Copper(II) complex

검색결과 171건 처리시간 0.031초

Spectrophotometric determination of acetylsalicylic acid with copper-$\alpha$-picolin complex in tetrachloromethane ($\alpha$-picolin동에 의한 aspirin의 용매 흡광도 정량법)

  • 백남호;박만기
    • YAKHAK HOEJI
    • /
    • 제13권2_3호
    • /
    • pp.80-83
    • /
    • 1969

  • Acetylsalicylic acid gives a water-insoluble violet complex with $<\alpha>$-Picolin-Cu(II) reagent. The Complex is extractable well with a mixture of $<\alpha>$-Picolin-tetrachloromethane solution. The Complex salt dissolved in the mixed solution shows a maximum absorption at 620 m$<\mu>$. It has a melting point at $171^{\circ}C-$173^{\circ}C and molar ratio of Acetylsalicylic acid: Cu(II): $<\alpha>$-Picolin was estimated as 2:1:2 by continuous variation method and chelate titration method.

  • PDF

Polarographic Behaviors of Copper and Cadmium Complexes with 2,2'-Bipyridine and Ethylenediamine in Acetonitrile (아세토니트릴에서 구리와 카드뮴의 2,2'-Bipyridine과 Ethylenediamine 착물에 대한 폴라로그래프적 연구)

  • Park, Du Won;Lee Heung Lark;Bae Zun Ung
    • Journal of the Korean Chemical Society
    • /
    • 제18권3호
    • /
    • pp.202-209
    • /
    • 1974

  • Polarographic behaviors of copper and cadmium complexes with 2,2'-bipyridine and ethylenediamine in acetonitrile have been investigated by the DC and AC polarography. The reduction processes are estimated as follows; $Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}\risingdotseq+0.1V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.43V}}\;Cu(Hg)$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}}\;Cu(I)-en.\;complex\;{times}\;{\longrightarrow^{e^-}_{E_{1/2}=-0.56V}}\;Cu(Hg)$$Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.57V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{2e^-}_{E_{1/2}=-0.97V}}\;Cd(I)-bipy\;complex$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=+0.05V}\;Cu(I)-en.\;complex{\longrightarrow^{e^-}_{E_{1/2}=-0.92V}}\;Cu(Hg)$ The limiting currents of all steps are controlled by diffusion. The number of ligand and the dissociation constant for Cu(Ⅰ)-bipy. complex were found to be n = 2 and $K_d=(1.5{\pm}0.1){\times}10^{-7}$, respectively.

  • PDF

Self-Assembly of Three-Dimensional Copper(II) Macrocyclic Complex with 2,5-Pyridinedicarboxylate Linked by Hydrogen Bond (수소 결합에 의한 삼차원의 Copper(II) 거대고리 착물과 2,5-Pyridinedicarboxylate와의 자기조립)

  • Ki-Young Choi;Haiil Ryu;Yong-Son Kim
    • Journal of the Korean Chemical Society
    • /
    • 제47권2호
    • /
    • pp.104-108
    • /
    • 2003

  • The reaction of $[Cu(L)]Cl_2{\cdot}H_2O(L=3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,0^{1.18},0^{7.12}]docosane)$ with 2,5-pyridinedicarboxylate(pdc) led to the formation of $[Cu(L)(H_2O)](pdc){\cdot}6H_2O(1)$. The structure was characterized by X-ray crystallography and spectroscopic method. The coordination geometry around the copper atom is a distorted square-pyramid with four secondary amines of the macrocycle occupying the basal sites and a water molecule at the axial position. Intermolecular hydrogen bonds in 1 form a three-dimensional molecular network.

  • https://doi.org/10.5012/jkcs.2003.47.2.104 인용 PDF KSCI

Copper(II) Complex of a Di-N-hydroxyethylated Tetraaza Macrocycle (Di-N-hydroxyethylated Tetraaza 거대고리 Copper(II) 착물)

  • 최기영;김용선;류해일;서일환;추금홍
    • Korean Journal of Crystallography
    • /
    • 제11권3호
    • /
    • pp.147-150
    • /
    • 2000

  • The complex [CuL}Cl₂·3H₂O(1)(L=2,13-bis(2-hydroxyethyl)-5,16-dimethyl-2,6,13,17-tetraazatricyclo[14,4,0/sup 1.18/,0/sup 7.12/] docosane) has been synthesized and characterized by X-ray crystallography. 1. crystallized in the monoclinic, space group C2/c, with a=21.647(6)Å, b=8.549(1)Å, c=18.132(5)Å, β=118.58(2)°, V=2946.8(12)ų, Z=4, R₁(wR₂) for 2374observed reflections of [I>2σ(I)] was 0.052(0.187). The centrosymmetric complex 1 has an axially elongated octahedral geometry with four secondary and tertially amines of the macrocycle and tow oxygen atoms of the pendant hydroxyethyl groups.

  • PDF

Adsorption Characteristics of Ammonia Complex of Copper(II) on Activated Carbon (활성탄에 의한 구리(II) 암모니아 착염이온의 흡착 특성)

  • Hong, Wan-Hae;Kim, Jung-Gyu;Na, Sang-Kwon
    • Applied Chemistry for Engineering
    • /
    • 제8권1호
    • /
    • pp.23-28
    • /
    • 1997

  • The adsorption characteristics of ammonia-Cu(II) complex on activated carbon were studied. Firstly, the specific surface area of the activated carbon was measured by using the BET adsorption apparatus. Secondly, the characteristics of the removal copper(II) ion from aqueous ammonia solution by forming a complex with ammonia and then by the adsorption of the complex on the activated carbon were studied. It was found that the specific surface area increases with decreasing the mesh number of the activated carbon, and the optimum pH for the adsorption of the Cu(II) ion on she activated carbon was found to be approximately 6. It was also found that the adsorbed Cu(II)-ammonia complexes on the activated carbon in the aqueous ammonia solution have two types, depending on the concentration of the solution ; i.e. $[Cu(NH_3){_2}]^{2+}$and $[Cu(NH_3){_3}]^{2+}$ for $2.25{\times}10^{-4}(mol/{\ell})$and $2.25{\times}10^{-3}(mol/{\ell})$, respectively.

  • PDF