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Tetracy anoethylene

Dibenzothiophene acts as a 7r-electron donor and readily forms complexes with known electron acceptors. In such cases the electronic spectrum of a solution of the two compounds shows a new absorption band, usually in the visible region. The order of donor strengths of several o,o -bridged biphenyls has been estimated from their respective charge-transfer spectra and found to be carbazole > fluorene > dibenzothiophene >dibenzofuran. Dibenzothiophene forms complexes with tetracy-anoethylene, various polynitro derivatives of fluorenone, > naphthalene-1,4,5,8-tetracarboxylic acid dianhydride, and tetra-methylmic acid. ... [Pg.202]

The spectrum for the interaction of dibenzothiophene with tetracy-anoethylene has been correlated with the calculated highest-occupied orbital energies of dibenzothiophene and used to obtain its ionization potential. ... [Pg.202]

Tetrahaptocyclohexatriene- and cyclooctatetraene-metal-tricarbonyl complexes undergo some unusual cyclo-addition reactions with tetracy-anoethylene in which the dienophile undergoes a 1,3 addition across the coordinated ligand and causes a rearrangement of the metal-carbon bonds, for example (99),... [Pg.29]

See other pages where Tetracy anoethylene is mentioned: [Pg.41]    [Pg.42]    [Pg.195]    [Pg.155]    [Pg.41]    [Pg.42]    [Pg.195]    [Pg.155]   
See also in sourсe #XX -- [ Pg.3 , Pg.21 ]

See also in sourсe #XX -- [ Pg.3 , Pg.21 ]

See also in sourсe #XX -- [ Pg.60 , Pg.121 ]

See also in sourсe #XX -- [ Pg.60 , Pg.121 ]

See also in sourсe #XX -- [ Pg.184 ]

See also in sourсe #XX -- [ Pg.126 ]



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