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A Kinetic Study on the Reduction of Cyanocobalamin with Titanium(III) Chloride
Author(s) -
Pan Kuan,
Hsu MingTa
Publication year - 1972
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.197200022
Subject(s) - chemistry , ionic strength , reaction rate constant , titanium , chloride , ionic bonding , activation energy , inorganic chemistry , kinetic energy , mole , kinetics , nuclear chemistry , analytical chemistry (journal) , aqueous solution , chromatography , ion , organic chemistry , physics , quantum mechanics
The reaction rate for the reduction of cyanocobalamin (B 12 ) with Ti(III) in HCl and KCl solutions at constant ionic strength was followed by spectrophotometric measurements at 15°, 20°, 25° and 30°C. The reaction rats was found to be of pseudo‐first‐order with respect to B 12 and of second‐order with respect to B 12 and Ti(III) in HCl solutions. The second‐order rate constant was given by for the processes, The values of K 0 obtained were 0.80∼1.29 liter mole −1 sec −1 in the range of ionic strength 0.2∼0.5 M at 30°. The average activation energy was 20.5 kcal mole −1 .
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