Über mehrkernige Kobaltammine und über eine ergiebige Herstellungsweise des Nichtelektrolyten [Co(NH3)3Cl3]

Die Perchlorate der bekannten komplexen Kationen [Co2(NH3)6(OH)3]3+, [Co2(NH3)6(OH)2. (H2O)2]4+ und [Co(NH3)3(H2O)3]3+ werden erstmalig beschrieben. Das Gleichgewicht zwischen Tri‐μ‐hydroxo‐ und Di‐μ‐hydroxo‐diaquo‐Komplex in wäßriger Lösung sowie die Kinetik der Hydrolyse des Di‐μ‐hydroxo‐diaquo‐Komplexes in saurem Medium zu [Co(NH3)3(H2O)3]3+ werden untersucht. Darstellung und Eigenschaften der Di‐μ‐diacido‐Komplexe [Co2(NH3)6(OH)2. F2]X2, [Co2(NH3)6(OH)2(N3)2]X2 und [Co2(NH3)6(OH)2(NCS)2]X2 werden beschrieben.

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Transition Moments of Visible Region Absorption Bands of trans(Cl)-Triammineaquadichlorocobalt(III) Chloride

Mitsutsuka¹,

Nawa²,

Yoshizawa³

et al. 2002

Bulletin of the Chemical Society of Japan

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From single crystals of trans(Cl)-[CoCl2(NH3)3(H2O)]Cl, thin sections with different orientations and different thicknesses were prepared, and their polarized absorption spectra were examined in the 350–850 nm region using a microspectrophotometer. Two absorption peaks, caused by the (x2−y2 ← xy)-type transitions of the d-electrons of Co, were found: a 15750 cm−1 peak was assigned to overlapping A2 ← A1 and B2 ← A1 type transitions of the complex ion with C2v symmetry; a 19210 cm−1 peak was assigned to a B1 ← A1 type transition. The molar extinction coefficients (ε) were determined at each of these peaks: ε(||c) = 104 and ε (⊥c) = 16 l cm−1 mol−1 at 15750 cm−1, and ε(||c) = 5 and ε(⊥c) = 54 l cm−1 mol−1 at 19210 cm−1. These ε values were explained by taking distortions of the d-electron orbitals into consideration, that are partly caused by the oxygen atom coordination and partly by some vibronic couplings between the d-electron orbitals and cobalt-ligand stretching vibrations.

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Über mehrkernige Kobaltammine und über eine ergiebige Herstellungsweise des Nichtelektrolyten [Co(NH₃)₃Cl₃]

Cited by 3 publications

References 10 publications

The Formation, Structure, and Reactions of Binuclear Complexes of Cobalt

The Formation, Structure, and Reactions of Binuclear Complexes of Cobalt

Zur Kenntnis der Zweikernigen Co(III)‐Ammine mit Hydroxo‐Brücken

Transition Moments of Visible Region Absorption Bands of trans(Cl)-Triammineaquadichlorocobalt(III) Chloride

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