NDLI: Catalysis of carbon tetrachloride conversion by copper complexes with monoethanolamine immobilized on the surface of silica

Content Provider	Springer Nature Link
Author	Smirv, V. V. Tarkhava, I. G. Kokorin, A. I. Pergushov, V. I. Tsvetkov, D. S.
Copyright Year	2005
Abstract	The catalytic properties of silica-immobilized copper complexes with monoethanolamine in reactions of CCl$_{4}$ addition to 1-octene and combined metathesis of C-Cl and C-H bonds in the CCl$_{4}$-decane system were studied. The catalytic activity was found to be an extremal function of metal concentration. The increase of activity during the addition of CCl$_{4}$ to octene as the metal content was decreased to ~0.3 wt % can be explained by an increase in the fraction of mononuclear copper complexes of differing composition. Further changes in activity were due to the formation of metal complexes with various ligand environments. A comparison between EPR data and catalytic properties suggested that the most active catalysts contained a considerable number of divalent copper complexes with a coordination environment of four nitrogen atoms, which are more effective than oxygen at increasing electron density on copper ion; this facilitated the reduction of Cu(II) to Cu(I). The above complexes are unstable because the ligands are rigidly fixed on the surface and strained structures are formed. Ligands in the coordination sphere of the metal can be readily replaced by substrate molecules, which exhibit weak solvating power.
Starting Page	65
Ending Page	71
Page Count	7
File Format	PDF
ISSN	00231584
Journal	Kinetics and Catalysis
Volume Number	46
Issue Number	1
e-ISSN	16083210
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2005-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis Modeling and Simulation Computer Science Applications

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