Book ChapterDOI
Hydroxo-Bridged Complexes of Chromium (III), Cobalt (III), Rhodium (III), and Iridium (III)
TLDR
In this paper, a review of the chemistry of hydroxo-bridged chromium(III), cobalt(III) and rhodium-III complexes is presented.Abstract:
Publisher Summary Polynuclear complexes with hydroxide (or oxide) as bridging ligands constitute an important class of complexes. They are formed by hydrolysis of mononuclear aqua complexes of most metal ions and, therefore, constitute an important aspect of the hydrolytic chemistry of metal ions. They display a chemistry which is interesting and is also relevant in relation to applied chemistry and to biochemistry. This chapter reviews the chemistry of hydroxo-bridged chromium(III), cobalt(III) complexes, and includes studies of the related rhodium(III) and iridium(III)systems. The review focuses the chemical properties of these complexes, and special emphasis has been made on reactions that involve the cleavage or formation of a hydroxo bridge. Reactions of bridging groups other than hydroxide and reactions of nonbridging ligands are also discussed in the chapter. A large number of X-ray crystal-structure determinations have been made during the past two decades. The hydroxo-bridged chromium(III) oligomers constitute a very interesting class of complexes from a spectroscopic and magnetochemical point of view. The most important methods for obtaining structural information about solutions are probably potentiometric pH measurements and visible/ultraviolet spectroscopy, but many other techniques have been applied, including bridge-cleavage experiments, magnetic measurements, and electron spin resonance (ESR) spectroscopy.read more
Citations
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Metal Oxide Surfaces and Their Interactions with Aqueous Solutions and Microbial Organisms.
Gordon E. Brown,Victor E. Henrich,William H. Casey,David Clark,Carrick M. Eggleston,Andrew R. Felmy,D. Wayne Goodman,Michael Grätzel,Gary E. Maciel,Maureen I. McCarthy,Kenneth H. Nealson,Dimitri A. Sverjensky,Michael F. Toney,John M. Zachara +13 more
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Large aqueous aluminum hydroxide molecules.
TL;DR: William Casey (born 1955) received his Ph.D. in Mineralogy and Geochemistry from The Pennsylvania State University in 1986 and jointed the faculty of the University of California in 1991 and has published over 130 scientific articles on subjects relating to aqueous solution chemistry of natural waters, mineral surface chemistry, and reaction kinetics.
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Identification of the strong Brønsted acid site in a metal–organic framework solid acid catalyst
Christopher A. Trickett,Christopher A. Trickett,Thomas M. Osborn Popp,Thomas M. Osborn Popp,Ji Su,Ji Su,Chang Yan,Jonathan Weisberg,Ashfia Huq,Philipp Urban,Philipp Urban,Juncong Jiang,Juncong Jiang,Markus Kalmutzki,Markus Kalmutzki,Qingni Liu,Qingni Liu,Jayeon Baek,Jayeon Baek,Martin Head-Gordon,Gabor A. Somorjai,Gabor A. Somorjai,Jeffrey A. Reimer,Jeffrey A. Reimer,Omar M. Yaghi,Omar M. Yaghi +25 more
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Bonding and reactivity at oxide mineral surfaces from model aqueous complexes
TL;DR: This work determines the rates of oxygen exchange between an aqueous fluid and specific sites on the ‘Al13’ polyoxocation—AlO4Al 12(OH)24(H2O)7+12—the structure of which closely resembles the surfaces of some Al-(hydr)oxide minerals in soils and catalyst supports.
Journal ArticleDOI
Rates and mechanisms of oxygen exchanges between sites in the AlO4Al12(OH)24(H2O)127+(aq) complex and water: implications for mineral surface chemistry
William H. Casey,Brian L. Phillips,Magnus Karlsson,Susanna Nordin,Jan P. Nordin,David J. Sullivan,Susan M. Neugebauer-Crawford +6 more
TL;DR: In this paper, rate coefficients for steady exchange of oxygens between sites in the AlO4Al12(OH)24(H2O)127+(aq) (Al13) complex and bulk solution were determined over the temperature range of 9-19°C and 4.6
References
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Journal ArticleDOI
Early stages of the hydrolysis of chromium(III) in aqueous solution. 1. Characterization of a tetrameric species
Hans Stuenzi,Werner Marty +1 more
TL;DR: In this article, the authors propose a formation d'especes contenant Cr 3+ (aq), Cr 2(OH) 4 4+ (q), Cr 3 (OH) 6 6+ q, Cr 4 (OH), 4 5+ q and 4 6+q.
Journal ArticleDOI
Nutritional role of chromium
TL;DR: The biological function of chromium is closely associated with that of insulin and most chromium-stimulated reactions are also insulin dependent, so proper chromium nutrition leads to a decreased requirement for insulin and also an improved blood lipid profile.
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Early stages of the hydrolysis of chromium(III) in aqueous solution. 1. Characterization of a tetrameric species
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