Chromium, trichloro

Dimethylberyllium Chromium Molybdenum (IV) Trichloro(vinyl)silane... 

The addition of trichloro- ortetrachloroethylene to aluminium components in dry cleaning equipments is responsible for many accidents. The effect of the carbon tetrachloride/methanol mixture in the 1/9 proportion of aluminium, magnesium or zinc causes the dissolution of these metals, whose exothermicity makes the interaction dangerous. There is a period of induction with zinc, which is cancelled out when copper dichloride, mercury dichloride or chromium tribromide is present. 

As discussed (vide supra) disproportionation and isomerization are often competitive reactions. The reaction rates of both types depend on the temperature and the catalyst used for the reaction. Chromium(III) oxide on support, or without, favors the disproportionation of 1,1,2-trichloro-1.2,2-trifluoroethane to give l,l-dichloro-l,2.2,2-tetrafluoroethane and 1,1,1.2-tetra-chloro-2,2-difluoroethane whereas with aluminum trifluoridc the isomerization is favored.24 The higher the chlorine content of the molecules the greater is their reactivity. 

As can be seen from Table 3, the product distribution is different due to the catalyst. Chromium(III) oxide leads, in the case of l,l,2-trichloro-l,2,2-trifluorocthanc and 1,2-dichlo-ro-l,l,2.2-tetrafiuoroethane, to products with roughly the same amounts of fluorine atoms attached to both carbons whereas aluminum trifluoridc leads to products with a high fluori-nation degree on one carbon and a low one on the other carbon. Similar results are obtained with an aluminum trifluoride catalyst prepared from aluminum oxide and chlorofluoroethanes.25... 

Virtually no undesired byproducts are formed when l.l,2-trichloro-l,2,2-lrifluoroethane is treated at 400 C with a chromium(III) oxide on an aluminum trifluoride catalyst which yields only 1.2-dichloro-l,l,2.2-tetrafluoroethane, 1,1,2,2-tetrachloro-l,2-difluoroelhane, and... 

The dismutations of 1-chloropcnlafluoroprop-l-ene (8) and l,2-dichloro-l,3.3,3-tetrafluoro-prop-l-ene and the equilibrium partial pressures (dim. = atm) of the compounds in the mixture35 with chromium(III) oxide as the catalyst have been reported likewise for the copropor-tionation of hexafluoropropene and 1, l,2-trichloro-3,3,3-trifluoroprop-1-cnc. 

The examples given demonstrate that l,3,5-trichloro-2.4,6-trifluorobenzene can be dispropor-tionated either with or without an additive. Aluminum trifluoride and chromium(III) fluoride act as catalysts and enhance the reaction boron trifluoridc, however, seems to act as an inhibitor. 

Potentially explosive reaction with nitric acid + sulfuric acid, bromine trifluoride, nitrosyl chloride + platinum, nitrosyl perchlorate, chromyl chloride, thiotrithiazyl perchlorate, and (2,4,6-trichloro-l, 3,5-triazine + water). Reacts to form explosive peroxide products with 2-methyl-1,3-butadiene, hydrogen peroxide, and peroxomonosulfuric acid. Ignites on contact with activated carbon, chromium trioxide, dioxygen difluoride + carbon dioxide, and potassium-tert-butoxide. Reacts violendy with bromoform, chloroform + alkalies, bromine, and sulfur dichloride. 

SgO, cycto-Octasulfur monoxide, 21 172 ScCl303Ci2H24, Scandium(IU), trichloro-tris(tetrahydrofuran)-, 21 139 SeC, Carbon selenide, chromium complex, 21 1, 2... 

ScCI3, Scandium chloride, 22 39 ScCl3Cs, Cesium scandium chloride, 22 23 ScC1303C 2Hm, Scandium(lll), trichloro-tris(tetrahydrofuran)-, 21 139 Sc2CI,Cs3, Cesium scandium chloride, 22 25 SeC, Carbon selenide, chromium complex, 21 1, 2 Se2C, Carbon diselenide, 21 6, 7 Se2NC3H,i, Diselenocaibamic acid, N,N-di-ethyl-,... 

Cl3YbC 2H24, Ytterbium trichloro-tri(tetrahydrofuran)-, 27 139, 28 289 03CljNd2C 2H24, Neodymium, hexachloro-tris(tetrahydrofuran)di-, 27 140,28 290 O3C0N2C15H, Cobalt tricarbonyl(2-(phenylazo)phenyl-C JV]-, 26 176 03CrC,Hj, Chromium, (T -benzene)tricar-bonyl-, 28 139... 

Trichloro(tripyridine)chromium(III), synthesis 36 Tris(3-bromoacetylacetonato)chromium(III), synthesis 37 Cyclopentadienyl tricarbonyl hydrides of chromium, molybdenum, and tungsten, synthesis 38 Trichloro(tripyridine)molybdenum(III), synthesis 39 Potassium octacyanotungstate(IV) 2-hydrate, synthesis 40 Chlorine(CP )-labeled thionyl chloride, silicon tetrachloride, boron chloride, germanium (IV) chloride and phosphorus(III) chloride, synthesis 44 Unipositive halogen complexes, synthesis 46 Monopyridineiodine(I) chloride, synthesis 47 Manganese(III) acetylacetonate, synthesis 49 Triiron dodecacarbonyl, synthesis 52... 

Pfeiffer prepared trichloro(tripyridine)chromium(III) from anhydrous chromium(III) chloride and from dichloro-tetraaquochromium(III) chloride 2-hydrate (the common hydrated chromic chloride of commerce), but neither details of the preparations nor yields were reported. The reaction of [Cr(H20)4Cl2]Cl-2H20 with pyridine gives [Cr(C6H6N)3-CI3] with a yield of about 4%. In the procedure described here, the complex can be prepared in about 90% yield when anhydrous chromium(III) chloride is used as the starting material. 

Trichloro(tripyridine)chromium(III) is a light green solid when finely pulverized. The compound does not... 

Methylbromoarsines, synthesis 26 Vanadium(III) fluoride, synthesis 27 Sulfur(IV) fluoride, synthesis 33 Peroxydisulfuryl difluoride, synthesis 34 Trichloro(tripyridine)chromium(III), synthesis 36 Tris(3-bromoacetylacetonato)chromium(III), synthesis 37 Trichloro(tripyridine)molybdenum(III), synthesis 39 Uranyl chloride 1-hydrate, synthesis 41 Rhenium(III) iodide, synthesis 50 Potassium hexachlororhenate(IV) and potassium hexa-bromorhenate(IV), synthesis 51 Iron-labeled cyclopentadienyl iron complexes, synthesis 54 Inner complexes of cobalt(III) with diethylenetriamine, synthesis 56... 

CrC5H8(CO)aH Cyclopentadienyl-chromium tricarbonyl hydride, and derivatives, 7 136, 139 sodium derivative, 7 104 [CrCsH5(CO)3l2 Cyclopenta-dienylchromium tricarbonyl, dimer, 7 104, 139 [GrC5H5(CO)3]jHg Bis(cyclo-pentadienylchromium tri-carbonyl)mercury, 7 104 [Cr(C6HsN)3Cl3 Trichloro (tri-pyridine) chromium (III),... 

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