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464 CHEMISTRY AND TECHNOLOGY OF EXPLOSIVES


Here are a few data related to these compounds given by Jefremov [32] (Table 105).
TABLE 105

Picryl chloride and
the second component

m. p., °C

Acenaphthene 113.2
Anthracene decomp.
Fluorene 64.6
Naphthalene 91.2
Phenanthrene 82.4
Retene 53.5

According to the same author (Jefremov and Frolova [32]), with l-chloro-


2,4-dinitrobenzene picryl chloride forms an addition compound (mol. ratio 1:1)


m. p. 31.2°C. Formerly Frankland and P. H. Garner [27] and Desvergnes [18]


reported only the formation of a simple eutectic containing 44-45% picryl chloride


with m. p. 25.0-25.6°C.


Recently T. Urbanski, Semenczuk and Górski [32a] confirmed the statement


of Jefremov and Frolova.


Picryl chloride reacts with pyridine to form picrylpyridinium chloride (IV)


IV (m. p. 113-115°C)

This compound, first prepared by Wedekind [33], is even more reactive than


dinitrophenylpyridinium chloride (p. 454). Bielig and Reidies [23] described a reac-


tion after Zincke and Weisspfennig’s work [22] which resulted in the formation


of hexanitrodiphenyl sulphide (picryl sulphide) (p. 553).


Okon [34] in a number of investigations found that when picrylpyridinium chlo-
ride reacts with phenols or aromatic amines, derivatives of trinitrodiphenyl oxide


or trinitrodiphenylamine are obtained :


On treating picrylpyridinium chloride with alcohol Hodges [35] obtained picryl-

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