Aromatic diazenes containing azulen-1-yl moieties Part 2: The synthesis,characterization, electronic spectra and basicity of novel,bis aromatic diazenes containing two azulen-1-yl moieties |
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| Authors: | Alexandru C Razus Liviu Birzan Mihaela Cristea Bogdan Popa |
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| Affiliation: | 1. Department of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economics, Wroc?aw University of Economics, 118/120 Komandorska, 53-345 Wroc?aw, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 2 Okólna, 50-422 Wroc?aw, Poland;1. Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania;2. Turku University Centre for Materials and Surfaces (MATSURF), Laboratory of Materials Chemistry and Chemical Analysis, University of Turku, 20014 Turku, Finland;3. University of Turku Graduate School (UTUGS), FI-20014 Turku, Finland;1. Department of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economics, Wroc?aw University of Economics, 118/120 Komandorska, 53-345 Wroc?aw, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroc?aw, Poland;1. Institute of Organic Chemistry “C.D. Nenitescu” of Roumanian Academy, 202B Spl. Independentei, 060023, Bucharest, Romania;2. University “Politehnica” of Bucharest, Faculty of Applied Chemistry and Material Science, 1-7 Gheorghe Polizu, 011061, Bucharest, Romania |
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| Abstract: | Bis aromatic diazenes which possess either two identical or two different azulene-1-yl groups substituted at either 1,3 or 1,4-positions in the bridging phenylene moiety were synthesized in good yield via diazotization of the 3- or 4-azulen-1-ylazo-phenylamines followed by coupling with azulene in a buffered medium. The electronic spectra of the synthesized compounds were analyzed by comparison with those of previously published compounds. The isosbestic points obtained by protonation of the compounds enabled their pKa values to be determined. |
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