3,31 Diaminobenzophenone

Polyimides derived from 3,3, 4,4 -benzophenone tetracarboxylic acid dianhydride (BTDA), I, and 3,3 -diaminobenzophenone (m,m -DABP), IIA, 4,4 -diaminobenzophenone (p,p -DABP), IIB, or 4,4 -oxydianiline, IIC, (and to which have been added numerous metal compounds) have been prepared. The synthetic procedure em-... 

Polyimides. In situ co-deposition of metal salts such as Co(II), or LiCl into a polyimide precursor from 3,3, 4,4 -tetracarboxybenzophenone dianhydride and 4,4 -diaminobenzophenone with subsequent thermal curing offers surface-conductive polyimide film [43]. By similar procedures, Taylor et al. prepared a series of polyimides modified with Pd, Pt, Ag, Au, Cu, Sn, Ti and magnetic-Fe [44, 45, 46]. 

Several aromatic diamines were prepared using DDT as starting compound. 4,4 -Diaminobenzophenone was prepared using a three-stage process, including dehydrochlorination of DDT, oxidation of the 1,1-dichloro-2,2-di-(4-chlorophenyl)-ethylene thus formed and amination of 4,4 -dichlorobenzophenone [20, 23] (Scheme 2.8). 

Considerable research effort has been devoted in recent years to the use of chloral derivatives for the synthesis of linear heterocyclic polymers. Of these, the most common are aromatic polyimides [1-12], Many of these polymers have been synthesised from compounds like 4,4 -diaminobenzophenone, and other diamines, which, as demonstrated in the previous chapter, can be obtained from chloral. Polyimides prepared from these diamines were largely synthesised by the conventional two-step procedure [11, 12] involving mild reaction of the diamines with the bis(phthalic)anhydrides, isolation of poly(o-carboxy)amide (PCA) prepolymers, and then processing into products followed by thermal or chemical imidisation [13—16] (Scheme 3.1). Some properties of polyimides prepared from 4,4 -diaminobenzophenone are provided in Table 3.1. 

As can be seen from Table 3.1, polyimides based on 4,4 -diaminobenzophenone and common dianhydrides of tetracarboxylic acids (those of pyromellitic, diphenyloxide-3,3, 4,4 -tetracarboxyhc and benzophenone-3,3, 4,4 -tetracarboxylic acids) possess good thermal properties. However, when in their cyclised forms they are practically insoluble in organic solvents, which restricts the possibility of their investigation, processing and use. 

These results of the analysis of the ESR spectra are consistent with the chemical data depicted in Scheme 3-45 (below). Namely, upon reduction with tin in hydrochloric acid, 4,4 -dinitrobenzophenone forms 4,4 -diaminobenzophenone (only the nitro groups are reduced, Staedel 1883). Under the same conditions, 4,4 -dinitrodibenzoyl gives 4,4 -diamin-odesoxybenzoin (both nitro and carbonyl groups are reduced, Golubeff 1873). 

Selenium sulfide Streptozotocin Sulfallate T etrachloroethene T etrachloromethane T etrafluoroethene N,N,N , N -T etramethyl-4,4 -diaminobenzophenone T etranitromethane Thioacetamide Thiourea o-Tolidine Toluene-2,4-diamine... 

Bis (p-(N,N-dimethylamino) phenyl) ketone Bis (4-(dimethylamino) phenyl) methanone Michler ketone p,p -Michler s ketone Tetramethyidiaminobenzophenone N,N,N N -Tetramethyl-4,4-diaminobenzophenone Classification Substituted aromatic ketone Empirical C17H20N2O Formula CO[C6H4N(CH3)2]2 Properties Wh. to greenish leaflets or blue powd. sol. in ethanol, acetone, benzene, pyrimidine very si. sol. in ether, diethyl ether pract. insol. in water m.w. 268.36 m.p. 172-176 C b.p. >360 C (dec.) flash pt. 220 C... 

Tetramethyl decynediol ethoxylate 2,4,7,9-Tetramethyl-5-decyne-4,7-diol ethoxylate. See PEG tetramethyl decynediol Tetramethyidiaminobenzophenone N,N,N N -Tetramethyl-4,4 -diaminobenzophenone. See Michler s ketone... 

Further attempts directed efforts to obtain DOPO-containing reactive flame retardants with a higher content of phosphorus. DOPO was reacted with a carbonyl group of 4,4 -dihydroxybenzophenone or 4,4 -diaminobenzophenone to give a double DOPO-containing bisphenol IX and diamine X, respectively (Scheme 14.5). 

AJAf,A/, Af -Tetramethyl-4,4 -diaminobenzophenone Michler s ketone 4,4 -Methylenebis[AfAf-dimethylaniline] 90-94-8... 

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