Nitro compounds trinitro

Such cyclohexadienes are easily oxidizable to benzenes (often by atmospheric oxygen), so this reaction becomes a method of alkylating and arylating suitably substituted (usually hindered) aryl ketones. A similar reaction has been reported for aromatic nitro compounds where 1,3,5-trinitrobenzene reacts with excess methyl-magnesium halide to give 2,4,6-trinitro-l,3,5-trimethylcyclohexane. Both... 

Ammonium nitrate explosives usually contain a certain amount of nitro compounds from mononitro (e.g. nitronaphthalene) to trinitro compounds (e.g. trinitrotoluene). 

No m-nitrotetryl is produced if pure dimethylaniline is used in the usual process for the manufacture of tetryl. The amount of this impurity in the usual process depends upon the amount of monomethylaniline which may be present. A large excess of sulfuric acid tends toward the production of m-nitro compounds, but a reduction in the amount of sulfuric acid is not feasible for this increases the amount of benzene-insoluble material. m-Nitro-tetryl reacts with water, as TNA does the nitro group in the 3-position is replaced by hydroxyl, and m-hydroxytetryl or 2,4,6-trinitro-3-methylnitraminophenol, yellow crystals from water, m.p. 183°, is formed. This substance resembles picric acid and forms explosive salts. It is readily soluble in water, and... 

Aromatic mononitro compounds may sometimes be characterised by conversion into the corresponding dinitro or trinitro derivatives. It may be noted that many poly-nitro compounds form characteristic addition compounds with naphthalene. 

Among the electron acceptors which exhibit the sensitization 133 are various nitro compounds, cyano-compounds, some organic acids such as phthalic acid, carboxylic acid anhydrides, quinones, etc. The most efficient electron accepting sensitizer known to date is 2,4,7-trinitro-9-fluorenone (TNF)134,135. Not surprisingly,... 

Thus, nitro compounds with a great number substituents, for example trinitro-mesitylene, do not give any colour reactions. Compounds with nitro groups located in the 2,4-positions, produce colours that depend to a considerable extent on the substituent in position 1. The presence of the OH or NH2 group interferes with the colour reaction. The situation remains unchanged after both of the groups have been acylated, while alkylation of a phenol restores the ability to produce colour,... 

Ostromyslensky [90] observed that rubber could be vulcanized in the absence of sulphur or its compounds if small quantities of aromatic nitro compounds, e.g. nitrobenzene, dinitro- or sym- trinitro-benzene, tetranitronaphthalene plus certain oxidizing compounds, such as benzoyl peroxide, were added to it. The resultant vulcanized rubber had mechanical properties not inferior to those of a product vulcanized by sulphur alone, and when free from accelerators it exhibited a greater resistance to ageing. Some metal oxides, such as PbO, CaO, BaO, promoted vulcanization by nitro compounds. Urea played the role of an accelerator of vulcanization. These observations have been confirmed in more recent studies by other workers. 

As shown by T. Urbanski [143] between 1933 and 1937, there is a group of molecular addition compounds whose existence cannot be explained by all the points mentioned above. They are addition compounds of certain nitro compounds with esters of nitric acid. Thus many aromatic mononitro compounds form addition compounds with mannitol hexanitrate, and some aromatic trinitro compounds do so with erythritol tetranitrate (Vol. II). On the basis of these facts the author suggests that two main reasons are responsible for the formation of these addition compounds ... 

During World War II a method of preparing mixtures of nitro compounds (e.g. TNT and TNX, or TNT and tetryl, see Vol. IV) was developed by the Germans. It consisted in the nitration of the corresponding lower nitrated compounds, namely a mixture of mononitrotoluenes plus mononitroxylenes was nitrated in two stages to form trinitro compounds. In this way a product containing 20% of TNX and 80% of TNT was obtained. 

The high thermal stability of nitro compounds is manifested by the high activation energy E of their thermal decomposition. The following are figures referring to mono-, di> and trinitro compounds ... 

T. Urbahski and Buzniak (140, 141] undertook the task of a systematic study of the action of mono-, di- and trinitro derivatives of benzene and toluene (a few dozen compounds) on the polymerization of unsaturatcd pcdyester resin Polymal 109 . The polymerization was initiated with benzoil peroxide at 12 C. It was found that nitro compounds with an ortho substituent are particularly active as inhibitors of polymerization. 

Other Names 1,3,5-Trinitrobenzene 2,4,6-Trinitrobenzene NSC 36931 TNB TNB (nitro compound) Trinitrobenzene i-Trinitrobenzene sym-Trinitrobenzene CA Index Name Benzene, 1,3,5-trinitro-CAS Registry Number 99-35-4 Merck Index Number 9726 Chemical Structure... 

Tri nitro-1 -N aphthol (2,4,7 -Trinitro-1 -oxy-naphthalene). Yellow prisms from AcOH or benz, mp 145° (decompn). Sol in AcOH glac AcOH. Prepn from 2,4-dinitro-l-naphthol by mixed acid (nitric-sulfuric-acetic) nitration. The compound is extracted as the Na salt from... 

Explosive decomposition occurred during attempted vacuum distillation, attributed either to the presence of some trinitro compound in the unpurified dinitrophenylacetic acid used, or to the known instability of o-nitro acid chlorides. A previous publication (ibid., 407) erroneously described the decomposition of 2,4-dinitrobenzoyl chloride. 

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