4,4 -Bis-dimethylamino-benzophenone. See

When phosgene is combined with A ,iV-dimethyianiiine in the presence of aluminium(III) chloride, Michler s ketone, 4,4 -bis(dimethylamino)benzophenone, is produced (see Section 10.2.1.1), which undergoes further reaction with lV,N-dimethylaniline (also in the presence of aluminium(ni) chloride or POCij) to give the colouring material "crystal violet", used in the production of methyl violet indicator paper. When Michler s ketone is warmed with Ai-phenyl-1-naphthylamine in the presence of POCI3, Victoria blue (4.13) is formed, which is used as a dye for natural fibres [718a]. 

Other Mechanisms Other three-component systems involve different mechanisms (see Refs [li,m] and references therein). For example, in the dye (crystal violet, phenosaffanine, methylene blue, thiopyronine)/amine/ketone (acetophenone, benzo-phenone, thioxanthone, 4,4 -bis-dimethylamino benzophenone) combi-nation, the mechanism is quite complex. In the camphorquinone CQ/amino-benzophenone ABP two-component system, both CQ and ABP absorbs the light an aminoalkyl radical on ABP and a ketyl radical on CQ are formed. 

Bis (dimethylamino) benzophenone-imine hydrochloride. See Basic yellow 2 Bis ((dimethylamino) carbonothioyl) disulfide. See Tetramethylthiuram disulfide Bis (p-dimethylaminocyclohexyl) methane. See Methylenebis (dimethylcyclohexylamine)... 

Bis (dimethylamino)-benzhydrylidenimine hydrochloride. See Basic yellow 2 Bis (dimethylamino) -4,4 -benzophenone 4,4 -Bis (dimethylamino) benzophenone 4,4 -Bis (N,N-dimethylamino) benzophenone p,p -Bis (N,N-dimethylamino) benzophenone. See Michler s ketone... 

When soluble or insoluble chlorides are warmed with chromic acid-sulfuric acid mixture, free chlorine is given off (along with chromyl chloride, see page 179). The chlorine can be detected in the gas phase through the blue color it yields on paper impregnated with 4,4 -bis-dimethylamino-thio-benzophenone. The mechanism of the color reaction is discussed in connection with the detection of free halogens (page 144). 

Auramine Auraminebose or Tetramethy -p,-diominoimino-benzophenone (called in Beil 4,4 -Bis-dimethyl amino-benzophenon), (CH,)jN-CsH4.C( NH)-CbH4-N(CH,)3, mw 267.36, N 15.72 %. Col Uts mp 136 insol in w sol in ale in eth. Can be prepd by treating its hydrochloride (see below) in aq ale with dil NaOH, as described in Ref 3, or by heating 4,4 -bis-dimethylamino-diphenylmethane with sulfur followed by treatment with ammonia (Retl, p 92)... 

See also Michler s ketone. [IRIPHENYLMETHANE AND RELATED DYES] (Vol 24) 4,4y-Bis(N,Ny-dimethylamino)benzophenone [90-94-8]... 

Bis (2,4-di-t-butylphenyl) pentaerythrityl diphosphite. See Bis (2,4-di t-butylphenyl) pentaerythritol diphosphite Bis (2,4-dihydroxyphenyl) methanone. See Benzophenone-2 Bis (2,4-dihydroxyphenyl) methanone and bis (2-hydroxy-4-methoxy-phenyl) methanone. SeeBenzophenone-11 Bis ((dimethylamino) carbonothioyl) disulfide. See Tetramethyithiuram disuifide... 

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