urbaf2

454 CHEMISTRY AND TECHNOLOGY OF EXPLOSIVES

This highly reactive compound may be utilized for various reactions (Zincke [20, 21]).

For example, with hydrogen sulphide it forms a tetranitro derivative of diphenyl

sulphide (Zincke and Weisspfennig [22]).

(3)

When reacted with mercaptans or thiophenols of the general formula RSH

yields thioethers (Bielig and Reidies [23]):

Commercial 1-chloro-2,4-dinitrobenzene prepared by the nitration of a mixture

of o- and p- chloronitrobenzenes usually contains the 1,2,6-isomer. The latter differs

from the 1,2,4-isomer in some of its properties. According to Borsche and Rants-

cheff [24], only the 1,2,4-isomer can react with the sodium salt of acetylacetic ester,

the 1,2,6-isomer remaining unchanged.

(4)

The structure of the 1,2,6-isomer has been determined by Ostromyslenskii [11]

from the following reactions leading to picric acid: