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Kinetics of the reactions Br2 + HCN, BrCN + I−, S(CN)2 + I− in aqueous acid solution

✍ Scribed by M. F. Nolan; J. N. Pendlebury; R. H. Smith

Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 464 KB
Volume: 7
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550070205

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✦ Synopsis

Spectrophotometric methods have been used to obtain rate laws and rate parameters for the following reactions: with k,, kb, E,, Eb having the values 85 f 5 l./mole.s, 5.7 f 0.2 s-l (both at 298.2'K), and 56 f 4 and 66 f 2 kJ/mole, respectively.

(2)

with k, = 0.106 f 0.004 I./mole .s at 298.2'K and E , = 67 f 2 kJ/mole. (3) S(CN)z + 31-+ H + -+ 1 3 -+ SCN-+ HCN d[S( CN)tI/dt = kd[S (CN)zI [I -1 with k d = (3.06 f 0.15) X l./mole.s at 298.2'K and Ed = 66 f 2 kJ/mole. Mechanisms for these reactions are discussed and compared with previous work.

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