urbaf2

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-