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ACIDIC PERIODATE OXIDATION OF SOME CYCLIC
ALCOHOLS IN PRESENCE OF RUTHENIUM (III)
Sheila
Srivastava* Kulina Singh, Ajaya Awasthi, Shalini Singh & Parul
Srivastava
Chemical Laboratories, Feroze Gandhi College, Raebareli-229001,India
*Author for correspondence e-mail:
she_ila72@yahoo.com
Abstract:-
Kinetic investigation on Ru(III) catalyzed oxidation
of cyclopentanol and cyclohexanol by acidified solution of sodium
periodate in the presence of mercuric acetate as a scavenger have
been made in the temperature range of 30-450C. The rate
shows first order kinetics both in substrate and Ru(III), while
order of reaction is zero with respect to periodate and hydrogen
ions. Insignificant influence of mercuric acetate and ionic strength
of the medium was observed, while the reaction showed negligible
effect of [Cl-] on the reaction rate. A transient
complex, formed between Ru(III) and cyclic alcohol in a slow and
rate determining step, react with periodate to give the product in a
fast step, which leads to regeneration of the catalyst. D2O
had insignificant effect on the rate of the reaction. A suitable
mechanism in conformity with the kinetic observations has been
proposed and the thermodynamic parameters computed.
Key Words:-
Kinetics, Ru(III) chloride, catalyst,
cyclic-alcohols, sodium periodate, oxidant,
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