Rhenate

Rhenates, tetraevanodtoxy-six-coordinate compounds structure, 1, 53 Rhenium... 

Ten grams (0.0134 mol) of solid potassium hexabromo-rhenate(IV)8 is added slowly to a vigorously stirred solution of 5.5 g. (0.032 mol) of silver nitrate in 50 ml. of concentrated nitric acid and 200 ml. of water. The slurry is stirred for 10 minutes after addition of the solid. After standing, the clear supernatant is decanted. The brown solid is transferred onto... 

Ebner and Walton have investigated the reduction of octahalodi-rhenate(III) dimers with a variety of phosphines (124). Simple substitution reactions are observed under mild conditions to form RegX Rs as is noted... 

ReCl4NOC]6H36, 1-Butanaminium, N,N,N-tributyl-, (SP-5-21)-tetrachlorooxo-rhenate(l-), [53675-30-2], 31 258 ReCl4OPC24H2l), Phosphonium, tetraphenyl-,... 

Analogously, the reaction of rhenate pentacarbonyl anion [Re(CO)5] as its sodium salt, with cyclopropenylium cations [C3Ph3]X (X = BF4, PF6) in THF, at -80 °C, afforded the octahedral n-coordinated pentacarbonyl ( /-l,2,3-triphenylcyclopropenyl)rhenium complex in 60-73% yield (equation 195)26 269. The l3C NMR (acetone-, .) spectrum dis-... 

Isomerization of a /Jtri mcth y I si I y I propargy 1 alcohol to give the ,/J-unsaluraled acyl silane via the intermediate enol form, the 1-hydroxy-1-trimethylsilylallene, occurs upon treatment with tetrabutylammonium per-rhenate and p-toluenesulphonic acid144. While several examples of the isomerization reaction are given, only one is able to give an acyl silane product. 

Metallic rhenium prepared by this method is generally between 99.0 and 99.8 per cent pure. The chief impurity is potassium, probably as potassium hydroxide. The product is a dense gray-black powder. The yield is between 85 per cent and 95 per cent based upon the potassium per-rhenate used. 

Rare earth chlorides, anhydrous, 28 Rare earth metals, 18 amalgams, concentration of, 17 Rhenium, metallic, 175 by reduction of ammonium per-rhenate, 177... 

ReCla Rhenium(V) chloride, 1 180 ReCleKa Potassium hexachloro-rhenate(IV), 1 178 ReOa Rhenium (VI) oxide, 3 186 Re04NH4 Ammonium perrhenate, 1 177, 178... 

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