Hydroxyl Thiocyanate ion

Buxton, G.V.; Greenstock, C.L.; Helman, W.P.; Ross, A.B.
J. Phys. Chem. Ref. Data 17, 513-886 (1988)

Reaction: ·OH + SCN^- ® HOSCN^-
Solvent: H₂O

k = 1.1 × 10¹⁰(L mol^-1 s^-1)

Data type: Selected or recommended value

Selected value.

Chin, M.; Wine, P.H.
Aquatic and Surface Photochemistry, G.R. Helz, R.G. Zepp and D.G. Crosby (eds.), CRC Press, Inc., Boca Raton, FL, 1994, p.85-96

Reaction: ·OH + SCN^- ® HOSCN^-
Solvent: H₂O

Activation energy = 14(kJ mol^-1), Log(A) = 12.49, Temperature range 279 to 319 K

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly
Excitation wavelength: 248 nm

Product buildup kinetics at 475 nm in soln. contg. 1.0 × 10^-4 mol L^-1 H₂O₂ and (0.5-5) × 10^-5 mol L^-1 SCN^-.

Motohashi, N.; Saito, Y.
Chem. Pharm. Bull. 41, 1842-1845 (1993)

Reaction: ·OH + SCN^- ® HOSCN^-
Reference Reaction: ·OH + C₆H₅CO₂^- ®
Solvent: H₂O

k = 1.2 × 10¹⁰(L mol^-1 s^-1), k_reference = 5.9 × 10⁹(L mol^-1 s^-1), pH = 7.5

Experimental method: Gamma-radiolysis
Analytical method: chromatography
Data type: Relative value measured by steady state method

Competition kinetics

Chin, M.; Wine, P.H.
J. Photochem. Photobiol., A 69, 17-25 (1992)

Reaction: ·OH + SCN^- ® HOSCN^-
Solvent: H₂O

Activation energy = 16(kJ mol^-1), Log(A) = 12.890, Temperature range 277 to 321 K
k = 1.3 × 10¹⁰(L mol^-1 s^-1), T = 297K

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics at 475 nm in soln. contg. 1 × 10^-4 mol L^-1 H₂O₂ and (1-60) × 10^-5 mol L^-1 SCN^-.

Elliot, A.J.; Simsons, A.S.
Radiat. Phys. Chem. 24, 229-231 (1984)

Reaction: ·OH + SCN^- ® HOSCN^-
Reference Reaction: ·OH + HCO₂^- ®
Solvent: H₂O

Activation energy = 11(kJ mol^-1), Log(A) = 11.951, Temperature range 292 to 352 K, k/k_reference = 3.0
k = 9.6 × 10⁹(L mol^-1 s^-1), k_reference = 3.2 × 10⁹(L mol^-1 s^-1), T = 292K

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Relative value measured directly

Competition kinetics

Tanaka, M.; Sakuma, H.; Kohanawa, O.; Fukaya, S.; Katayama, M.
Bull. Chem. Soc. Jpn. 57, 3403-3407 (1984)

Reaction: ·OH + SCN^- ® HOSCN^-
Solvent: H₂O

k = 1.0 × 10¹⁰(L mol^-1 s^-1), pH = 6.5

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics at 475 nm (SCN)₂^-.

Ellison, D.H.; Salmon, G.A.; Wilkinson, F.
Proc. R. Soc. London, Ser. A 328, 23-36 (1972)

Reaction: ·OH + SCN^- ® HOSCN^-
Solvent: H₂O

k = 1.1 × 10¹⁰(L mol^-1 s^-1)

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics (SCN)₂^- at 475 nm.

Zehavi, D.; Rabani, J.
J. Phys. Chem. 75, 1738-1744 (1971)

Reaction: ·OH + SCN^- ® HOSCN^-
Reference Reaction: ·OH + MeOH ®
Solvent: H₂O

k/k_reference = 12
k = 1.1 × 10¹⁰(L mol^-1 s^-1), k_reference = 9.7 × 10⁸(L mol^-1 s^-1)

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Relative value measured directly

Competition kinetics; 15% higher in O₂-satd. soln. contg. 0.2 mol L^-1 thiocyanate.

Zehavi, D.; Rabani, J.
J. Phys. Chem. 75, 1738-1744 (1971)

Reaction: ·OH + SCN^- ® HOSCN^-
Reference Reaction: ·OH + EtOH ®
Solvent: H₂O

k/k_reference = 5.5
k = 1.0 × 10¹⁰(L mol^-1 s^-1), k_reference = 1.9 × 10⁹(L mol^-1 s^-1)

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Relative value measured directly

Competition kinetics; 16% higher in O₂-satd. soln. contg. 0.2 mol L^-1 thiocyanate.