Accession Number : ADD010471

Title :   Unsymmetrical Polynitrocarbonates and Symmetrical 1,3-Bis (Halo-and Nitroalkyl Carbonyldioxy)-2,2-Dinitropropanes and Methods of Preparation.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gilligan,William H ; Stafford,Scott L

Report Date : 03 Mar 1982

Pagination or Media Count : 23

Abstract : This invention relates to organic carbonates and more particularly to nitro substituted organic carbonates. In order to prepare unsymmetrical carbonates, it is necessary to react a chloroformate of an alcohol with a second alcohol. The general method for preparing chloroformates is to react an alcohol with an excess of phosgene (poisonous gas) in the presence of a base as an acid acceptor. Inevitably a greater or lesser amount of the carbonate is formed, as a by-product, which lowers the yield and requires separation of the product. In addition, nitroalcohols in the presence of base, have a tendency to deformylate, which also lowers the yield of chloroformate. A third factor is that nitro substituted diols such as 2,2-dinitropropan-1, 3-diol form as major products linear carbonates and cyclic carbonates. (Author)

Descriptors :   *Patent applications, *Synthesis(Chemistry), *Carbonates, *Propane, Polymers, Nitro radicals, Alkyl radicals, Symmetry, Friedel crafts reactions, Catalysts, Formates, Alcohols, Ethanols, Propanols, Thiols, Energetic properties, Additives, Explosives, Propellants

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE