Mercury II sulfate

When 2 heptyne was treated with aqueous sulfunc acid containing mercury(II) sulfate two products each having the molecular formula C7H14O were obtained in approximately equal amounts What are these two compounds ... 

Propyn-l-ol Alkali metals, mercury(II) sulfate, oxidizing materials, phosphorus pentoxide, sulfuric acid... 

Merkuri-jodid, n. mer curic iodide, mercury (II) iodide, -nitrat, n. mercuric nitrate, mercury-(II) nitrate. -oxyd, n. mercuric oxide, mercury (II) oxide, -rhodanid, n. mercuric thiocyanate, mercury(II) thiocyanate, -salz, n. mercuric salt, mercury (II) salt, -sulfati n. mercuric sulfate, mercury (II) sulfate, -sulfidt ti. mercuric sulfide, mercury (II) sulfide. -sulfozyamd, n. mercuric thiocyanate. 

Alkynes don t react directly with aqueous acid but will undergo hydration readily in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry the -OH group adds to the more highly substituted carbon, and the — H attaches to the less highly substituted one. 

Alternatively, hydration of the acetylenes in cold concentrated sulfuric acid, or with mercury(II) sulfate in formic acid, yields 1-aryl-3,4-dihydro-5//-2-benzazepin-5-ones which are isolated as their methylsulfonate salts.79 If, however, acetylene 4 is stirred with pyrrolidine at room temperature then cyclization is accompanied by amination to give 8-chloro-l-(2-chlorophenyl)-4-(pyrrolidin-l-yl)-3i/-2-benzazepine (5) in high yield. 

Potassium permanganate Potassium sodium alloy 2-Propyn-l-ol Organic or readily oxidizable materials Air, carbon dioxide, carbon disulfide, halocarbons, metal oxides Alkali metals, mercury(II) sulfate, oxidizing materials, phosphorus pentoxide, sulfuric acid... 

Propynol, Mercury(II) sulfate, Sulfuric acid, Water, 4479 Styrene, Air, Polymerising styrene, 2945 Styrene, Butyllithium, 2945 Styrene, Dibenzoyl peroxide, 2945 Styrene, Initiators, 2945 f Tetrafluoroethylene, 0628... 

Mercury(II) sulfate is an electrolyte for primary batteries. Other apphca-tions are in extraction of gold and silver from roasted pyrites as a catalyst in organic reactions such as conversion of acetylene to acetaldehyde and as a reagent for wine coloring. 

Similarly, pyridine can be 3-sulfonated with hot sulfuric acid, or oleum, if mercuric [mercury(II)] sulfate is present as a catalyst (Scheme 2.5). The process is not straightforward and may involve a C-mecuriated pyridine intermediate [it is known, for example, that pyridine reacts with mercuric acetate at room temperature to form a pyridinium salt that decomposes at 180 °C into 3-(acetoxymercuri)pyridine (X = OAc)]. Without the catalyst, long reaction times and a temperature of 350 C are necessary even then, the yield of pyridine-3-sulfonic acid is poor. 

Mercuration of quinoline N-oxide in acetic acid or perchloric acid gives the 8-mercurio-chloride (26) as the main product and small amounts of the 3-, 5-, 6- and 7-isomers. In the absence of solvent mercury(II) sulfate gives all the possible isomers although the total yield is poor. 6-Methylquinoline N-oxide gives the 8-substituted derivative (27). The preferential 8-orientation is accounted for in terms of preliminary coordination of the mercury atom at the oxygen of the N-oxide. When the 8-position is blocked, as in 8-bromoquinoline N-oxide, mercuration is reported to occur at the 4-position (55YZ490, 69CPB906). 

The sulfonate salts of the --deficient heterocycles will undergo many reactions typical of arenesulfonates, such as displacement by hydroxide, on fusion with alkali (e.g. Scheme 129), or by cyanide on fusion with potassium or sodium cyanide. Also, the sulfonation of pyridine is reversible when pyridine-3-sulfonic acid is heated with 100% sulfuric acid and mercury(II) sulfate at approximately 330 °C a mixture is obtained containing mainly pyridine (58RTC963). 

The reaction of a bis-alkynic alcohol (103) with aqueous dimethylamine gives dimethyl-aminofuran (104) (74IZV206). trans-Enynols cyclize presumably through a cis intermediate with base (75RTC70) or mercury(II) sulfate, a method used for the synthesis of the terpenoid bilabone (105) (69JOC857). 

Fuming sulfuric acid containing 10-60% sulfur trioxide hydrolyzes perfluoro-jV-alkyl cyclic amines 39 to perfluoro-iV-alkyl lactams 40. Mercury(II) sulfate acts as a catalyst.160... 

A wide variety of mercury(II) salts have been employed as catalysts, though mercury(II) sulfate is the most widely used.331 Phenylmercury(II) hydroxide is useful for the selective conversion of terminal al-... 

See Mercury(II) sulfate, etc., above See Other ACETYLENIC COMPOUNDS... 

Hydration of 1-octyne gives 2-octanone according to the equation that immediately precedes this problem in the text. Prepare 1-octyne as described in the solution to Problem 9.9, and then carry out its hydration in the presence of mercury(II) sulfate and sulfuric acid. 

B-ll. Which one of the following is the intermediate in the preparation of a ketone by hydration of an alkyne in the presence of sulfuric acid and mercury(II) sulfate ... 

Silver nitrate Mercury (II) nitrate White precipitate of silver sulfate Yellow precipitate of mercury (II) sulfate... 

---