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1999 (1)
1977 (1)
1Author    Yasuhiro Inada3, Shigenobu FunahashibRequires cookie*
 Title    Equilibrium and Structural Study of Chloro Complexes of Iron(III) Ion in Acidic Aqueous Solution by Means of X-Ray Absorption Spectroscopy  
 Abstract    Using an extended X-ray absorption fine structure (EXAFS) technique, the formation constant of the pentaaquachloroiron(III) complex was determined to be 3.8 ± 0.4 mol-1 dm3 at 25.0 ± 0 .1 °C in a 1.00 mol dm-3 H C I O 4 aqueous solution. The structures of [Fe(OH2)6]3+ and [FeCl(OH2)5]2+ were determined on the basis of the same EXAFS data. The F e -0 bond length (2.05 A) in the latter is longer than that (2.01 A) in the former due to the electron donation and charge neutralization by the coordinating chloride ion with the Fe-Cl bond length of 2.26 A. 
  Reference    Z. Naturforsch. 54b, 1517—1523 (1999); received August 23 1999 
  Published    1999 
  Keywords    EXAFS, Complexation, Formation Constant, Iron(III) Ion, Chloride Ion 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1517.pdf 
 Identifier    ZNB-1999-54b-1517 
 Volume    54 
2Author    MastjnobuRequires cookie*
 Title    Solvent Deuterium Isotope Effect on Hydrolysis of Nd3+ Ion  
 Abstract    Ma e d a *, T o sh ih ik o A m a y a , and H id e t a k e K a k ih a n a The hydrolysis equilibria of Nd3+ ion in light-and heavy-water solutions containing 3 mol dm-3 (Li)C104 as an ionic medium were studied at 25 °C by measuring the lyonium-ion concentration with a glass electrode. Analysis of the em f data indicated the forma­ tion of only the mononuclear complex Nd(OL)2+ in both light and heavy water. The formation constant was smaller in D 2O (log */?2,i = -— 16.54 ± 0.04) than in H 2O (log *ß2,i = — 15.90 ± 0.06). The formation constant K<z,\ for the heavy-water system (log i?2,i = 12.28) had a larger value than that for the light-water system (log K%t 1 = 11.86). 
  Reference    (Z. Naturforsch. 32b, 1493—1495 [1977]; received August 30 1977) 
  Published    1977 
  Keywords    Deuterium Isotope Effect, Formation Constant, H eavy Water, Hydrolysis, Neodymium Ion 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-1493_n.pdf 
 Identifier    ZNB-1977-32b-1493_n 
 Volume    32