Chromium II sulfate

IV. Reduction of Conjugated Alkenes with Chromium (II) Sulfate... [Pg.23]

Chromium (II) sulfate is capable of reducing a variety of functional groups under mild conditions 10). Of particular interest is its ability to reduce a,jS-unsaturated esters, acids, and nitriles to the corresponding saturated compounds. This capability is illustrated in the procedure by the reduction of diethyl fumarate. [Pg.23]

Ammonium sulfate, 4574 Barium sulfate, 0217 Calcium sulfate, 3939 Chromium(II) sulfate, 4244 Copper(II) phosphinate, 4272 Copper(II) sulfate, 4282 Iron(II) sulfate, 4399... [Pg.249]

Aluminium, 0048 Ammonium phosphinate, 4554 Barium phosphinate, 0210 f Benzaldehyde, 2731 1,4-Benzenediol, 2333 Bis(hydrazine)tin(II) chloride, 4070 Calcium acetylide, 0585 Calcium phosphinate, 3931 Chromium(II) chloride, 4052 Chromium(II) oxide, 4241 Chromium(II) sulfate, 4244 Copper(I) bromide, 0265 Diacetatotetraaquocobalt, 1780 Diisobutylaluminium hydride, 3082 f 1,2-Dimethylhydrazine, 0955... [Pg.371]

REDUCTION OF CONJUGATED ALKENES WITH CHROMIUM(II) SULFATE DIETHYL SUCCINATE... [Pg.50]

A. Chromium II) sulfate solution. A 3-1., thrcc-neckcd flask fitted with a gastight mechanical stirrer and nitrogen inlet and outlet stopcocks is charged with 300 g. ca. 0..S.S mole) of hydratt d... [Pg.50]

Chromium(II) sulfate is a versatile reagent for the mild reduction of a variety of bonds. Thus aqueous dimethylformamide solutions of this reagent at room temperature couple benzylic halides, reduce aliphatic monohalides to alkanes, convert vicinal dihalides to olefins, convert geminal halides to carben-oids, reduce acetylenes to /raw5-olefins, and reduce a,j3-unsatu-rated esters, acids, and nitriles to the corresponding saturated derivatives. These conditions also reduce aldehydes to alcohols. The reduction of diethyl fumarate described in this preparation illustrates the mildness of the reaction conditions for the reduction of acetylenes and o ,j8-unsaturated esters, acids, and nitriles. [Pg.52]

Though unnecessary for this reduction, it is more usually convenient for chromium(II) sulfate reductions to fit the rubber septum to a stopcock adapter of the type described in Note 6. [Pg.133]

Chromium(II) perchlorate is the salt of choice for preparing the en complex in dimethylformamide solution. At comparable concentration levels chromium(II) sulfate is insoluble, and the <-.lu-omium(lI) chloride - is only partially soluble in the i-( a< tion solution. [Pg.113]

Arene(tricarbonyl)chromium complexes, 19 Nickel boride, 197 to trans-alkenes Chromium(II) sulfate, 84 of anhydrides to lactones Tetrachlorotris[bis(l,4-diphenyl-phosphine)butane]diruthenium, 288 of aromatic rings Palladium catalysts, 230 Raney nickel, 265 Sodium borohydride-1,3-Dicyano-benzene, 279 of aryl halides to arenes Palladium on carbon, 230 of benzyl ethers to alcohols Palladium catalysts, 230 of carboxylic acids to aldehydes Vilsmeier reagent, 341 of epoxides to alcohols Samarium(II) iodide, 270 Sodium hydride-Sodium /-amyloxide-Nickel(II) chloride, 281 Sodium hydride-Sodium /-amyloxide-Zinc chloride, 281 of esters to alcohols Sodium borohydride, 278 of imines and related compounds Arene(tricarbonyl)chromium complexes, 19... [Pg.372]

Benzylchlorobis(triphenylphos-phine)palladium(II), 30 Chromium(II) sulfate, 84 Diethoxycarbenium tetrafluoro-borate, 108... [Pg.397]

Chromium(II) sulfate, 84 2-Cyanopyridinium chlorochromate, 87 2,4-Dimethylpentane-2,4-diol chro-mate(VI) diester, 122 Pentacarbonyl(ethylmethoxymethylene)-chromium, 82... [Pg.408]

CrXi, which dissolve in water with the evolution of heal, although the fluoride is less soluble than the other halides. The ammoniacal solution of chromium(II) sulfate, CrS04, is particularly reactive with gases, not only with oxygen like the other Cr compounds, but also acetylene. Chromium(II) acetate is only slightly soluble in HiO... [Pg.382]

Aluminium, 0048 Ammonium phosphinate, 4549 Barium phosphinate, 0210 f Benzaldehyde, 2727 1,4-Benzenediol, 2326 Bis(hydrazine)tin(II) chloride, 4064 Calcium acetylide, 0582 Calcium phosphinate, 3925 Chromium(II) chloride, 4046 Chromium(II) oxide, 4235 Chromium(II) sulfate, 4238 Copper(I) bromide, 0264 Diacetatotetraaquocobalt, 1774 Diisobutylaluminium hydride, 3076 f 1,2-Dimethylhydrazine, 0951 1,2-Diphenylhydrazine, 3511 Dipotassium phosphinate, 4425 f Ethanedial, 0719 f Formaldehyde, 0415 Formic acid, 0417 Gallium(I) oxide, 4405 Glucose, 2513 f Hydrazine, 4515 Hydroxylamine, 4493 Hydroxylaminium phosphinate, 4550 Hyponitrous acid, 4464 Iron(II) chloride, 4055 Iron(II) hydroxide, 4386 Iron(II) sulfate, 4393 Fead(II) phosphinate, 4526 Fead(II) phosphite, 4530 Fithium dithionite, 4682 Magnesium, 4685 Magnesium phosphinate, 4512 Manganese(II) phosphinate, 4514 f Methylhydrazine, 0500 Phenylhydrazine, 2366 Phosphinic acid, 4498 Phosphonic acid, 4499 Phosphonium iodide, 4510 Potassium, 4640 Potassium hypoborate, 0163... [Pg.2567]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...