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Chromium lll

Chromium(III) hydroxide dissolves in acids to form hydrated chromium(lll) salts in concentrated alkali, hydroxo-complexes [Cr(OH)g] are formed. [Pg.382]

Chrom-hydrat, -hydroxyd, n. chromic hydroxide, chromium(lll) hydroxide, -hydroxydul, n. chromous hydroxide, chromium(II) hydroxide. [Pg.92]

Transition metal ions. Transition metal ions impart color to many of their compounds and solutions, (a) Bottom row (left to right) iron(lll) chloride. copper ll) sulfate, manganese(ll) chloride, cobalt(ll) chloride. Top row (left to right) chromium(lll) nitrate, iron(ll) sulfate, nickel(ll) sulfate, potassium dichromate, (b) Solutions of the compounds in (a) in the order listed above. [Pg.151]

Chromium(lll) oxide, 402 Chromium trihydroxide, 396, 402 Cis-trans isomerism, 296, 394... [Pg.457]

Chromium(II) phthalocyanine (PcCr) is prepared from phthalonitrile and hexacarbonylchro-mium(O) in 1-chlornaphthalene.234 PcCr(OAc) is prepared from phthalonitrile and chro-mium(III) acetate without solvent235 or in nitrobenzene starting from chromium(II) acetate236 under reflux. Chromium(lll) phthalocyanine also forms /t-oxo dimeric complexes,237 which are more common with iron phthalocyanines. [Pg.732]

The catalyst is a mixture of copper, zinc oxide, and chromium(lll) oxide. Ethanol is produced in large quantities throughout the world by the fermentation of carbohydrates. It is also prepared by the hydration of ethene in an addition reaction ... [Pg.875]

Vimont A, Goupil J-M, Lavalley J-C, Daturi M, Surble S, Serre C, Millange F, Ferey, G, Audebrand N. Investigation of acid sites in a zeotypic giant pores chromium(lll) carboxylate, J. Am. Chem. Soc. 2006, 128, 3218-3227. [Pg.292]

Scheme132 Cathodic coupling of cyclohexenyl bromide with chromium(lll) as mediator. Scheme132 Cathodic coupling of cyclohexenyl bromide with chromium(lll) as mediator.
This reaction is accompanied by a visible colour change, as orange dichromate ions become green chromium(lll) ions. The concentration of alcohol in the blood is determined by measuring the intensity of the final colour. [Pg.491]

A( ueous solutions of chromium(ll) sulfate have Ijeen prepared from chromium(lll) sulfate by reduction with zinc powder and from potassium dichromate by reduction with amalgamated zinc and sulfuric acid. Solid chromitim(II) sulfate penlahyrlrate can be obtained from the reaction of highly purified chromium metal... [Pg.133]

Extraction of Zinc and Chromium(lll) from Electroplating Baths... [Pg.617]

Figure 5.9 Heterogenized chromium(lll) binaphthyl Schiff base complex (16) described by Che et al. [57],... Figure 5.9 Heterogenized chromium(lll) binaphthyl Schiff base complex (16) described by Che et al. [57],...
Trihydrazinecobalt(ll) nitrate, 4205 Trihydrazinenickel(ll) nitrate, 4592 Tris(2,2 -bipyridine)chromium(ll) perchlorate, 3874 Tris(2,2 -bipyridine)silver(ll) perchlorate, 3873 Tris(2,3-diaminobutane)nickel(ll) nitrate, 3589 Tris(l,2-diaminoethane)chromium(lll) perchlorate, 2619 Tris(l,2-diaminoethane)cobalt(III) nitrate, 2622 Tris(l,2-diaminoethane)ruthenium(III) perchlorate, 2621 Tris(4-methoxy-2,2 bipyridine)ruthenimn(ll) perchlorate, 3886 Tris(3-methylpyrazole)zinc sulfate, 3540 Tris(l,10-phenanthroline)cobalt(lll) perchlorate, 3890 Tris(l,10-phenanthroline)ruthenium(ll) perchlorate, 3889... [Pg.42]

Chromium(lll) hydroxide may be prepared by precipitation from mixing ammonium hydroxide solution with a soluble chromium(lll) salt, such as chromium (111) chloride or nitrate ... [Pg.223]

The aqueous solution may be analyzed for chromium by AA or ICP techniques. Chromium(III) may be measured by ion chromatography. Additionally, the compound may be decomposed thermally to chromium(lll) oxide, Cr203, which can be identified by x-ray techniques. Water content of the hydroxide may be measured by gravimetry. [Pg.223]

Chromium(lll) sulfate is used as the electrolyte for obtaining pure chromium metal. It is used for chrome plating of other metals for protective and decorative purposes. Other important applications of this compound are as a mordant in the textile industry in tanning leather to dissolve gelatin to impart green color to paints, varnishes, inks, and ceramic glazes and as a catalyst. [Pg.228]

Tezuka M, Momiyama K, Edano T, et al. 1991b. Protective effect of chromium(lll) on acute lethal toxicity of carbon tetrachloride in rats and mice. J Inorganic Biochem 42 1-8. [Pg.187]

While the ultimate product of the reaction is the product of an O2 insertion into the Cr - C bond (Sect. 3.1), the first identifiable sfep is the binding of O2 to chromium. At - 45 °C, a color change of the solution from the brilliant blue of Tp Cr-Ph to a dark red indicated the formation of a new compound, which is stable at this low temperature. Monitoring the reaction by in-situ IR spectroscopy revealed the appearance of a new band at 1027 cm which shifted to 969 cm when 02 was used. These vibrational data are consistent with the formation of a chromium(lll) superoxide complex, namely Tp u.MeQy(Q2)pj (Scheme 3, top). [Pg.120]

C9H21N3, N,N, N"-Trimethyl-1,4,7-triazacyclo-nonane, Megtacn complexes with chromium(lll), 34 151—154 C9H23Cl2N3Pt, Platinum(ll),... [Pg.243]

N3CrF909S3Ci2H2i, Chromium(lll), (N,N, N"-trimethyl-1,4,7-triazacyclononane)tris(tri-fluoromethanesulfonato)-, 34 152 N3M0O3C18H15, Molybdenum(0), tricarbonyl-... [Pg.252]

See other pages where Chromium lll is mentioned: [Pg.99]    [Pg.99]    [Pg.46]    [Pg.380]    [Pg.641]    [Pg.241]    [Pg.255]    [Pg.376]    [Pg.382]    [Pg.571]    [Pg.182]    [Pg.731]    [Pg.668]    [Pg.39]    [Pg.232]    [Pg.17]    [Pg.21]    [Pg.132]    [Pg.154]    [Pg.154]    [Pg.156]    [Pg.243]    [Pg.243]    [Pg.248]    [Pg.253]   


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Photochemistry of Chromium(lll) Ammine Compounds

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