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Tetramethyldibenzotetraaza annulene

The first N solid-state thermometer was based upon the tautomerism of 1,8-dihydro-5,7,12,14-tetramethyldibenzo(b,i)-l, 4,8,11-tetraazacyclotetradeca-4,6, 1 l,13-tetraene N4(tetramethyldibenzotetraaza(14)annulene) (TTAA). The tautomeric structures of TTAA are shown in Fig. 12. Four lines are observed from the four chemically inequivalent nitrogen atoms. The chemical shift differences between nitrogens a/b and c/d are given by ... [Pg.33]

TTAA l,8-dihydro-5,7,12,14-tetramethyldibenso (b,i)-l,4,8,ll-tetraazacyclotetradeca-4,6,ll,13-tetraene- 15N4 (tetramethyldibenzotetraaza( 14)annulene). [Pg.496]

In polycrystalline tetramethyldibenzotetraaza[14]annulene (TTAA, Fig. 6.30) a related tautomerism was observed [49]. By a combination of solid state and... [Pg.186]

Figure 6.30 Arrhenius diagram of single H-transfer in poly-c stalline tetramethyldibenzotetraaza[14]annulene (TTAA) according to Ref. [49],... Figure 6.30 Arrhenius diagram of single H-transfer in poly-c stalline tetramethyldibenzotetraaza[14]annulene (TTAA) according to Ref. [49],...
See other pages where Tetramethyldibenzotetraaza annulene is mentioned: [Pg.150]    [Pg.150]    [Pg.150]    [Pg.150]    [Pg.400]    [Pg.302]    [Pg.551]    [Pg.722]   
See also in sourсe #XX -- [ Pg.724 ]



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