Welcome to LookChem.com Sign In|Join Free

Article Doi

Oxidation of Thiocyanate and Iodide Ions by Hydrogen Atoms in Acid Solutions. A pulse Radiolysis Study

DOI: 10.1039/f19888401101

Source and publish data:

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 1101 - 1112 (1988)

Update date:2022-08-10

Topics:

Authors:

Elliot, A. JohnElliot, A. John

Geertsen, SusanneGeertsen, Susanne

Buxton, George V.Buxton, George V.

Read Full Text PDF DownLoad Join now for total 90,000,000 free articles

Article abstract of DOI:10.1039/f19888401101

The kinetics and mechanism of the oxidation of SCN- and I- by H atoms in acidic aqueous solution have been studied using pulse radiolysis by following the formation of (SCN)2.- and I2.-.The formation of HSCN.- has been observed as a precursor of (SCN)2.-; it has λmax = 420 nm and εmax = 4.2 x 102 m2 mol-1 and its formation rate constant k(H+SCN-) = (2.3 +/- 0.1) x 108 dm3 mol-1 s-1.Kinetic measurements are consistent with the following mechanism: where R = reduction products.With SCN- R included volatile -SH compounds (probably H2S) but not H2, and with I- R = H2.For X- = SCN-, K = 0.81 +/- 0.08 dm3 mol-1, k1 = 3.0 x 105 and k2 = 2.8 x 106 dm3 mol-1 s-1; and for X- = I-, K = 0.82 +/- 0.13 dm3 mol-1, k1 <= 105 and k2 = (2.3 +/- 0.4) x 107 dm3 mol-1 s-1.The spectrum of HI.- could not be detected.HSCN.- reacts rapidly with O2 with a rate constant of (7.6 +/- 0.6) x 108 dm3 mol-1 s-1, but H(SCN)2.2- appears to be unreactive.No evidence for oxidation of Br- and Cl- by H could be detected.

View More

Products guided by the article

Product name:Thiocyanate

Cas No:1111-68-8

1111-68-8

R&D Labs maybe for 1111-68-8

Relevant to this article

Hot Product