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Tetraethylammonium Bromochromate, TEABC, Tetrahexylammonium Bromochromate, THexABC and Tetraheptylammonium Bromochromate, THepABC are new reagents used for almost quantitative conversion of alcohols into the corresponding aldehydes and ketones. These tetraalkylammonium bromochromate reagents are easily synthesized by the reaction of relative tetraalkylammonium bromide with a solution of CrO 3 in a 1:1 mole ratio. These reagents are versatile agents for the effective and nearly quantitative oxidation of organic substrates, in particular for alcohols, under mild and acid-free conditions. Keywords: Chromium(VI), Tetraethylammonium Bromotrioxochromate, Tetrahexylammonium Bromotrioxochromate, Tetrahepthylammonium Bromotrioxochromate, Oxidation, Organic substrates, Alcohols. e-mail: shghamami@ikiu.ac.ir or shghamamy@yahoo.com INTRODUCTION Chromium(VI) compounds are widely used as oxidation agents. 1 Water-soluble potassium and sodium dichromates with strong acids were used as oxidants and in most cases, the products were non-specific. The first attempt to make a mild reagent of substituted chromates was reported by Sarett and co-workers, who used pyridine to form a salt with CrO

journal of the chilean chemical society

THREE NEW TETRAALKYLAMMONIUM BROMOCHROMATES, NR4 [CRO3BR], (R= ET, HEX, HEP): MILD AND EFFICIENT REAGENTS FOR OXIDATION OF PRIMARY AND SECONDARY ALCOHOLS