Summary
Volumetric measurements of ethylene and simple EDTA titration of copper(I) and copper(II) ions confirm that [CuL]+ and [CuL2]+ are formed when an aqueous solution of copper(II) is reduced by copper metal in the presence of ethylene, (L). The formation constants,K 1=[CuL+]2[Cu2+]−1[L]−2 andK 2=[CuL +2 ]−1[L]−1, have been estimated. The formation of [CuL]+ is accompanied by an enthalpy change, ΔH, of −25 kJ mol−1, and a positive entropy change, ΔS, of 13 J mol−1 K−1.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. M. Keefer and L. J. Andrews,J. Am. Chem. Soc.,71, 1723 (1949); R. M. Keefer, L. J. Andrews and R. E. Kepner,J. Am. Chem. Soc.,71, 3906 (1949).
S. E. Manahan,Inorg. Chem.,5, 482 (1966); t. Ogura,Inorg. Chem.,15, 2301 (1976).
D. G. Ulibarri, T. Ogura, J-W. Tzeeng, N. Scott and Q. Fernado,Anal. Chem.,54, 2307 (1982).
Catalyst Soc. of Jpn.,Handbook of Catalyst (in Japanese), Ed. Tazin-shokan, Jpn., 1972.
J. A. Dean,Lang's Handbook of Chemistry, 12th Edit., McGraw-Hill, New York, 1979.
K. Onda, E. Sada, T. Kobayashi, S. Kito and K. Ito,J. Chem. Eng., Jpn., (1970); T. Yana, T. Suetake, T. Umebara and A. Horiuchi,Chem. Eng.,38, 320 (1974).
L. G. Sillen and A. E. Martell (Eds.),Stability Constant of Metal—Ion Complexes, The Chemical Society, London, 1958.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yanagihara, N., Eduardo del Castillo, S. & Ogura, T. Determination of copper(I)-ethylene complexes, [Cu(C2H4)]+ and [Cu(C2H4)2]+, with aid of EDTA titration of copper(I) and copper(II) ions. Transition Met Chem 12, 12–14 (1987). https://doi.org/10.1007/BF01023120
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01023120