Symmetry and Vibrational Frequencies of Dodecahedrane

✍ Scribed by Dr. Otto Ermer

• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 241 KB
• Volume: 16
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197704111

✦ Synopsis

with the potentials E, and Eh of equally charged cyanines ( 2 a ) and (2b): the oxidation of the monocation (1)SEM; takes place at a potential about 0.41V more negative than that of (2a)REDf, that is "easier". In contrast the trication ( I ) SEMI + is oxidized at a potential about 0.70 V more positive that (2b) RED3+, that is essentially "more difficultly".

The precursor for the system (I) is r-1, c-2, t-3, t4-tetra-4pyridylcyclobutane (3)['*], which is formed in 70% yield by photodimerization of 4,4-dipyridylethylene[131 in aqueous methanol, the solvent differing from that used in the literature procedure ['4]. Quaternization of (3) with ethyl chloroformate and simultaneous deprotonation furnishes (I )RED, in 55% yieldL31.