Arene complexes of transition metals in reactions with nucleophilic reagents. XVI. Kinetics and mechanism of the reaction of the. pi. -arene complexes of chromium and iron and piperidine
The kinetics of the reaction of ..pi..-arene complexes of the (/eta/-XC/sub 6/H/sub 4/Cl)ML type (where ML = Cr(CO)/sub 3/ (X = p-Cl), Cr/sup +/(/eta/-C/sub 6/H/sub 5/Cl) (X = H), Fe/sup +/(/eta/-C/sub 5/H/sub 5/) (X = H)) with piperidine in acetone suggest that in the second and third cases the controlling stage is the transformation of the intermediate sigma complex into the reaction products almost entirely by a path with catalysis by the reagent while in the first case it is the formation of the intermediate. The marked increase in the catalytic effect of piperidine in the transition from neutral to cationic ..pi..-arene complexes show that the charge of the metal-complex fragment, coordinated with the arene, has a significant effect on the ratio of the rates of transformation of the intermediate sigma complex into the initial compounds and the final reaction products.
- Research Organization:
- Novosibrisk Institute of Organic Chemistry (USSR)
- OSTI ID:
- 6089594
- Journal Information:
- J. Org. Chem. USSR (Engl. Transl.); (United States), Vol. 23:12; Other Information: Translated from Zh. Org. Khim.; 23: No. 12, 2580-2586 (Dec 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AROMATICS
CHEMICAL REACTION KINETICS
CHROMIUM COMPLEXES
IRON COMPLEXES
PIPERIDINES
CATALYTIC EFFECTS
ACETONE
CARBONYLS
CATALYSIS
CATALYSTS
CHLORINATED AROMATIC HYDROCARBONS
INFRARED SPECTRA
NITRO COMPOUNDS
NMR SPECTRA
QUANTITY RATIO
REACTION INTERMEDIATES
STEREOCHEMISTRY
STRUCTURAL CHEMICAL ANALYSIS
AMINES
AZINES
COMPLEXES
HALOGENATED AROMATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
KETONES
KINETICS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
REACTION KINETICS
SPECTRA
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties