Amine copper fluorides

The third spectrum (c) was obtained from copper chloride dissolved in hydrated trioctylammonium 2-ethylhexanoate in toluene (the mixed extractant). It has a broad maximum absorbance at 725 nm, its symmetry is similar to that of copper carboxylate, and bonding of copper can be assumed to occur via the carboxylic oxygens in a manner similar to that of the dimer. Spectrum (c) bears an even greater similarity to that of the Cu-EDTA complex, the maximum absorption being at 734 nm, and which is known to have a distorted octahedral structure [12]. It is easy to convert the carboxyT ate dimer into a mixed complex. On adding trioctylamine to copper carboxylate, the maximum absorption shifts gradually from 680 to 725 nm. It is assumed that the addition of the amine converts the dimer into a monomer in which copper is bound to four monomeric carboxylic ligands and two amine molecules are located farther away in an axial position. It is of interest to note that the anion of the salt coextracted with the metal ion has no effect on the visible spectrum i.e., it is immaterial whether copper fluoride, chloride, or nitrate is extracted they all have the same spectrum. 

Many different variants of the thermal Balz-Schicmann reaction conditions, either in the preparation of the diazonium intermediate or in the thermal decomposition of this intermediate, have been repot ted. Thus, nitrites other than sodium nitrite have been used, e.g. isopcntyl nitrite in the preparation of fluorinated benzo[/j]- and benzo[ quinolines. Copper powder has been described as a catalyst in the preparation of a diazonium tetrafluoroborate from the corresponding amine with sodium nitrite/tetrafluoroboric acid, while fluoride salts, such as... 

HETEROCYCLES Copper phcnylace-tylide. Dichlorobis(benzonitrile)palladium. N-Dichloromethylene-N,N-dimcthylammo-nium chloride. Diiminosuccinonitrile. Dimethyl acetylenedicarboxylate. Dipotassium cyanodithioimidocarbonate. Ethoxy-carbonyl isothiocyanate. Ethyldiisopropyl-amine. Ethylene oxide. Hydrogen fluoride. Isocyanomethane-phosphoric acid diethyl ester. Lead tetraacetate. Lithium aluminium hydride. Methylhydrazine. Phosphoryl chloride. Polyphosphate ester. Polyphosphoric acid. Potassium amide. Potassium hydroxide. Tolythiomethyl isocyanide. Tosylmethyl isocyanide, Trichlo-romethylisocyanide dichloride. Trimethyl-silyldiazomethane. 

Direct cyclisation of ortfto-alkynyl-anilines can be effected simply by treatment with tetra-n-bntylam-monium fluoride, potassium f-butoxide or potassium hydride, or simply with gold(III) chloride. Treatment of l-(2-arylethynyl)-2-nitroarenes with indium and aqneons hydrogen iodide prodnces 2-aryl-indoles, the reagent combination both reduces the nitro to amine and then the acid activates the alkyne for the ring closure. Copper(II) salts or diethylzinc in refluxing toluene can be ntihsed with IV-sulfonyl-ort/fo-alkynyl-anilines. 

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