Di-isoamyl

Zinc di-isoamyl, Zn(CgHi3 )2, is prepared either by heating iso-amyl iodide and zinc at 180° C. or by heating mercury di-isoamyl and zinc in a sealed tube at 130° C. It is a liquid, fuming in air and boiling at 220° C. and has a density of 1 022 at 0° C. With acetaldehyde it forms methylisoamyl carbinol, isoamyl alcohol, and ethyl alcohol. ... 

Cadmium diethyl, 90 per cent. cadmium di-n-propyl, 85 per cent. cadmium di-n-butyl, 70 per cent. cadmium di-isobutyl, 75 per cent. cadmium di-isoamyl, 55 per cent. 

Mercury di-isobutyl and di-isoamyl react with halogens to form halides of the type RHgX, and mercury diethyl gives similar results... 

Mercury di-isoamyl.—This compound may be prepared in the same way as mercury di-isobutyl by replacing the isobutyl iodide by isoamyl iodide. It is a colourless, transparent, mobile liquid, possessing a faint amyl odour, and cannot be distilled even in vacuo without partial decomposition, although it is volatile in steam without decomposition. If heated above 140° C. considerable quantities of mercury separate. Its boiling-point at 70 mm. is 172° C., and the density at 0° C. is 1 6663. ... 

Mercury di-isoamyl is insoluble in water, slightly in alcohol, but readily soluble in ether. It does not oxidise in air, but when dropj ed into chlorine it forms isoamyl mercuric chloride. In contact with solid iodine it reacts with a hissing sound, and the reaction with bromine is still more violent. An ethereal solution of mercury di-isoamyl treated first with alcoholic and then with solid iodine gives isoamyl mercuric iodide and isoamyl iodide. Treatment with an excess of mercuric chloride in alcohol yields isoamyl mercuric chloride. 

With sodium, sodium isoamyl is formed, but in ethereal solution in a stream of carbon dioxide, isobutyl acetic acid results. Mercury di-isoamyl heated with zinc in a sealed tube for thirty-six hours at 180° C. yields zinc di-isoamyl. The mercury compound and glacial acetic acid heated for sixteen hours at 200° C. give isopentane, metallic mercury, and amyl acetate. Treatment with thallic chloride gives isoamyl mercuric chloride and thallous chloride. ... 

Mercury 5 5 -di-n-propyl"2 2 dithienyl yields silvery crystals, melting at 57° to 58° C. It is formed from 5-chloromercuri-2"n-propyl-thiophene by the action of a little more than 2 molecules of sodium iodide in acetone solution. The corres 3onding di isoamyl compound forms shining crystals from alcohoh melting, not very sharply, at 55° to 57° C. 

Chloromercuri"2-isoamylthiophene is obtained in 75 per cent, yield after the reaction mixture has stood for four days. It crystallises from benzene in fine needles, M.pt. 171 5° to 172° C., readily soluble in cold acetone or warm ether, sparingly in other cold solvents. If treated with sodium iodide it yields mercury 5 5 -di-isoamyl-2 2 -dithienyl. 

Thallium di-isoamyl chloride explodes at 253° to 257° C., and the fluoride melts at 216° to 218° C. with decomposition. They have similar properties to the n-butyl compounds. 

Lead di-isoamyl dichloride decomposes at 108° C., and the dibromide sinters at 93° C. 

Cadmium dimethyl. Cadmium diethyl Cadmium di-n-propyl Cadmium di-u-butyl Cadmium di-isoamyl Cadmium di-isobutyl... 

Mercury di-n-propyl Mercury di-isoamyL Tin tetraethyl Tin dimethyl diethyl... 

The liquid-vapour equilibrium in the HF-H2SO4-H2O system at 22 °C has been determined by a dynamic method for the range of pressure 7.0—348.2 Torr. The extraction of HF into di-isoamyl methylphosphonate from the HF-HCl-HjO system increases as the HF content rises on the other hand, the extraction of HCl decreases as the HF content rises. 

With bis(di-isoamyl) borane reduction of a terminal alkyne is selectively effected as shown (ref. 166). 

Di-isoamyl-p-tolylphosphine, (C5Hu)2CUH7.P, boils at 210° C. at 50 mm., density 0 894 at 25° C. It is only partially miscible with ethyl alcohol at 15° C. It forms a merciu ichloude which separates from glacial acetic acid in prisms, M.pt. 107° C. 

In the 1970s, improved or second-generation catalysts were developed. The essence of the improvement was that catalyst poisons AICI3 or AlEtCl2, which are cocrystallized with or absorbed onto the TiCls catalyst, were removed by using dialkyl ethers (especially di-n-butyl ether and di-isoamyl ether). 

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