I number of effective methods for converting aliphatic, and alicyclic, nitro compounds into vicinal dinitro compounds, I, are known; 2-4 the reaction originally described by Seigle, Hass, and Hudgin2 has proved to be especially useful. When a nitroparaffin salt is treated with bromine in the cold it is rapidly and quantitatively converted to the a-bromonitro compound; this, without being purified, is treated with a second equivalent of the ...
