The Photochemistry of Aqueous Solutions of Potassium Iodide Containing N2O

2010 ◽  
Vol 71 (11-12) ◽  
pp. 801-802 ◽  
Author(s):  
F. S. Dainton ◽  
S. A. Sills
Keyword(s):  
Aqueous Solutions ◽  
Potassium Iodide

scholarly journals Metallkomplexe mit 1,4,7-Trithiacyclononan: Kristallstrukturen von [CdI2 · C6H12S3]2 und [Hg(C6H12S3)2](HgI3)2 / Metal Complexes with 1,4,7-Trithiacyclononane: Crystal Structures of [CdI2 · C6H12S3]2 and [Hg(C6H12S3)2](HgI3)2

1993 ◽  
Vol 48 (7) ◽  
pp. 969-972 ◽  
Author(s):  
Joachim Pickardt ◽  
Jing Shen
Keyword(s):  
Aqueous Solutions ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Potassium Iodide ◽  
Cadmium Iodide ◽  
Mercuric Iodide ◽  
Space Group

Crystals of the complexes [CdI2 · C6H12S3]2 (1) and [Hg(C6H12S3)2](HgI3)2 (2) were obtained by diffusion of 1,4,7-trithiacyclononane (9 S 3) in ethanol into aqueous solutions of cadmium iodide and mercuric iodide/potassium iodide, resp. Both compounds crystallize monoclinically,1: space group P21/n, Z = 4, a = 1207.1(5), b = 909.9(2), c = 1240.3(7) pm, β = 92.59(9)°; 2: P21/c, Z = 2, a = 804.7(6), b = 934.0(6), c = 2167.9(4) pm, β = 94.34(7)°. 1 is dimeric, consisting of two [CdI2 · 9S3] units, connected via iodine bridges. Crystals of 2 contain sandwich-like cations [Hg(9S3)2]2+ and [HgI3]- anions, forming chains via Hg ··· S and Hg ··· I bridges.

scholarly journals Spectrophotometric investigations of the reaction between gold(III) and potassium iodide

2000 ◽  
Vol 65 (5-6) ◽  
pp. 345-352 ◽  
Author(s):  
Vesna Vasic ◽  
Suzana Premovic ◽  
Mira Cakar ◽  
Bojan Radak ◽  
Gordana Milovanovic
Keyword(s):  
Complex Formation ◽  
Aqueous Solutions ◽  
Absorption Spectra ◽  
Potassium Iodide ◽  
Equilibrium Constants ◽  
Hydrogen Ion

The equilibria of the complex formation between AuCl4-n(OH)n - and I- was studied spectrophotometrically in aqueous solutions containing KI:Au(III)?2 in the acidity range from 1 M HCl to pH 7 at 25?C. From the hydrogen ion and Cl-ion dependence of the absorption spectra, it was found that AuCl2I2 - and Au(OH)2I2 - complexes were formed. The equilibrium constants of complex formation were determined.

Radical and molecular yields in the γ -radiolysis of water. II. The potassium iodide-nitrous oxyde system in the pH range 0 to 14

1965 ◽  
Vol 287 (1411) ◽  
pp. 427-443 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Potassium Iodide ◽  
Alkaline Solutions ◽  
Water Molecules ◽  
Iodide Ions ◽  
Electron Scavenger ◽  
Ph Range

H 2 , O 2 , N 2 , I 2 and H 2 O 2 for 60 Co γ -irradiation of aqueous solutions of potassium iodide containing N 2 O have been measured at eleven values of pH in the range 0.1 to 14. As the pH is increased G (N 2 ) increases from 0.25 at pH 0.1 to 3.2 at pH 4 remaining constant to pH 10.8 when it again increases to 4 at pH 14. G (I 2 ) decreases from 1 at pH 0.1, passes through a minimum of 0.65 at pH 1.1, then increases to a constant value of 2.3 in the range 4 < pH < 11, thereafter increasing to 3.8 at pH 14. G (H 2 ) falls from 1.1 at pH 0.1 to a constant value of 0.4 at pH ≥ 2, and G (H 2 O 2 ) + G (O 2 ) is constant at 0.6 from pH 0 to 10, thereafter declining slowly to 0.34. These and other data which are presented are interpreted on the basis that G Є aq. = 2.3 and G H = 0.6 over the whole pH range, and that excited water molecules are also formed which can react with N 2 O (→ N 2 + 2OH), with OH - (→ Є aq. + OH), with H + (→ H + 2 + OH) and that 0 - , OH and H + 2 oxidize iodide ions whereas H reduces I - 3 Thus the available ‘conventional’ radical yields ‘ G H ’ and ‘ G OH ’ increase with either increasing electron scavenger concentration, e.g. O 2 and N 2 O, or increasing [H + ] or [OH - ]. Radical and molecular yields for alkaline solutions obtained by other methods are reviewed.

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