Stabilization of oxidation states through coordination

Douglas, Bodie E.

doi:10.1021/ed029p119

Cited by 5 publications

(4 citation statements)

References 25 publications

(30 reference statements)

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“…Taking into account the additive equation (5) and the linear dependences of the enthalpies of formation of gaseous halides on the enthalpies H M (n), it can be concluded that grouping of compounds is dictated by the argument, while the character of the change in the function is determined by the remaining terms of the additive sum in Eqn (5).…”

Section: A Concept Of Oxidation State Stabilisationmentioning

confidence: 99%

“…215 ± 219 Solutions of hydroxo complexes of platinum and iridium were treated with ozone and the resulting compounds were studied by various methods, including ESR, electronic absorption spectroscopy, cyclic voltammetry and chemical analysis. It was established that the platinum hydroxo complexes afforded the previously unknown platinum superoxo complexes [Pt(OH) 5 2 )Ir III (OH) 5 ] 57 } type. 218 This suggests that OS of +6 for iridium can be attained even under rather mild conditions (in solution), which indicates that treatment of solu-tions of hydroxo complexes with oxidants under more drastic conditions has considerable promise.…”

Section: Heavy Platinum Elementsmentioning

confidence: 99%

“…The factors that affect the stability of OS are diverse in nature and generally act simultaneously and competitively. 5 However, these factors can be, though rather arbitrarily, divided into thermodynamic (the first group) and kinetic (the second group) factors. The factors of the first group determine the possibility of formation of a particular ligand environment about the central atom (the formation of the short-range or long-range order).…”

Section: A Concept Of Oxidation State Stabilisationmentioning

confidence: 99%

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The problem of oxidation state stabilisation and some regularities of a Periodic system of the elements

Kiselev¹,

Tretiyakov²

1999

Russ. Chem. Rev.

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The general principles of the concept of oxidation state stabilisation are formulated. Problems associated with the preparation and provision of the highest valent forms of transition elements are considered. The empirical data concerning the synthesis of new compounds of rare-earth elements and d elements in unusually high oxidation states are analysed. The possibility of occurrence of the oxidation states + 9 and + 10 for some elements (for example, for iridium and platinum in tetraoxo ions) are discussed. Approaches to the realisation of these states are outlined and it is demonstrated that solid phases or matrices containing alkali metal cations are the most promising systems for the stabilisation of these high oxidation states. Selected thermodynamic features typical of metal halides and oxides and the regularities of the changes in the extreme oxidation states of d elements are considered. The bibliography includes 266 references.

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Section: A Concept Of Oxidation State Stabilisationmentioning

confidence: 99%

Section: Heavy Platinum Elementsmentioning

confidence: 99%

Section: A Concept Of Oxidation State Stabilisationmentioning

confidence: 99%

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The problem of oxidation state stabilisation and some regularities of a Periodic system of the elements

Kiselev¹,

Tretiyakov²

1999

Russ. Chem. Rev.

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“…Cobaltammine complexes have remarkable electron transfer ability 11 which may be due to the stabilization of a number of oxidation states by amine ligands. 12 The study of cobalt complexes was carried out as a typical example of first-row transition metals. 13 Moreover, cobaltammine complexes are of interest for their reversible adduct formation with molecular oxygen and the importance of their desired adducts.…”

Section: Introductionmentioning

confidence: 99%

Ethylenediamine-modified oriented MCM-41 at the electrode surface, cobalt adsorption ability and electrochemical performance

et al. 2014

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Mesoporous silica thin films (MCM-41) functionalized with ethylenediamine groups were electrochemically fabricated on electrode surfaces. These ligand functionalized film were a promising matrix for the immobilization of cobalt ions and preparation of cobalt complexes covalently bound to the MCM-41 support. The constructed MCM-41 were characterized by TEM, EDS and TGA analysis. This method yields uniform thin films with hexagonal mesochannels aligned and accessible to electrode surface. Well-defined electrode responses were, therefore, observed for the anchored complexes which made the electrochemical analysis of the structure possible as well. Voltammetric studies revealed the reactivity of the covalently bound complexes differed significantly from the dissolved ones. The anchored complexes preferred to be in their oxidized form which inhibits formation of oxygen adducts. The covalently bound complexes had relatively good leaching stability with good catalytic performance towards hydrogen peroxide reduction.

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