Browsing by Author "Zissimou, Georgia A."

Now showing items 21-27 of 27

    • Article  

      Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenesAAA 

      Savva, Anastasia C.; Mirallai, Styliana I.; Zissimou, Georgia A.; Berezin, Andrey A.; Demetriades, Marina; Kourtellaris, Andreas; Constantinides, Christos P.; Nicolaides, C.; Trypiniotis, Theodossis; Koutentis, Panayiotis Andreas (2017)
      Reacting N-aryliminophosphoranes with 1-(het)aroyl-2-aryldiazenes in preheated diphenyl ether at ca. 150-250 °C for 5-25 min affords in most cases the 1,3-diaryl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls (aka Blatter radicals) ...
    • Article  

      Redox Active Quinoidal 1,2,4-Benzotriazines 

      Zissimou, Georgia A.; Kourtellaris, Andreas; Manoli, Maria; Koutentis, Panayiotis A. (2018)
      Modifying the para-quinonimine 1,3-diphenyl-1,2,4-benzotriazin-7(1H)-one (2a) (E1/2–1/0 −1.20 V), by replacing the N1-phenyl by pentafluorophenyl, the C3-phenyl by trifluoromethyl, or the C7 carbonyl by ylidenemalononitrile, ...
    • Article  

      Route to benzo- and pyrido-fused 1,2,4-triazinyl radicals via N ′-(Het)aryl- N ′-[2-nitro(het)aryl]hydrazides 

      Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)
      A two-step route to 1,3-disubstituted benzo- and pyrido-fused 1,2,4-triazinyl radicals is presented. The route involves the N′-(2-nitroarylation) of easily prepared N′-(het)arylhydrazides via nucleophilic aromatic substitution ...
    • Article  

      Structural, magnetic, and computational correlations of some imidazolo-fused 1,2,4-benzotriazinyl radicals 

      Constantinides, Christos P.; Berezin, Andrey A.; Manoli, Maria; Leitus, G. M.; Zissimou, Georgia A.; Bendikov, M.; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)
      1,3,7,8-Tetraphenyl-4,8-dihydro-1H-imidazolo[4,5g][1,2,4]benzotriazin-4-yl (5), 8-(4-bromophenyl)-1,3,7-triphenyl-4,8-dihydro-1H-imidazolo[4,5g][1,2,4] benzotriazin-4-yl (6), and 8-(4-methoxyphenyl)-1,3,7-triphenyl-4,8-dihydro-1H- ...
    • Article  

      The suppression of columnar π-stacking in 3-adamantyl-1-phenyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl 

      Constantinides, Christos P.; Berezin, Andrey A.; Zissimou, Georgia A.; Manoli, Maria; Leitus, G. M.; Koutentis, Panayiotis Andreas (2016)
      3-Adamantyl-1-phenyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl(4) crystallizes as chains of radicals where the spin bearing benzotriazinyl moieties are isolated from each other. Magnetic susceptibility studies in the 5-300 K ...
    • Article  

      Synthesis and Characterization of Isodiphenylfluorindone and Isodiphenylfluorindinone 

      Zissimou, Georgia A.; Kourtellaris, Andreas; Koutentis, Panayiotis A. (2018)
      Isodiphenylfluorindone 6 and isodiphenylfluorindinone 7 are synthesized. The former reacts with NaOMe to give the 13-methoxyisodiphenylfluorindone 22 (95%), while the latter reacts with 70% perchloric acid to give the ...
    • Article  

      Tetraphenylhexaazaanthracenes: 16π Weakly Antiaromatic Species with Singlet Ground States 

      Constantinides, Christos P.; Zissimou, Georgia A.; Berezin, Andrey A.; Ioannou, Theodosia A.; Manoli, Maria; Tsokkou, Demetra; Theodorou, E.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2015)
      Tetraphenylhexaazaanthracene, TPHA-1, is a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state. TPHA-1 overcomes its weak 16π antiaromaticity by partitioning its π system into 6π positive and 10π ...