The reactivity and electronic spectra of pseudoaromatic sulphur compounds

✍ Scribed by R. Zahradník; J. Koutecký

• Publisher: Elsevier Science
• Year: 1961
• Tongue: French
• Weight: 190 KB
• Volume: 2
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)91663-6

✦ Synopsis

PSEODOAROMATIC sulphur compounds which we have studied by means of the eimple MO-LCAO method can be divided into four groups according to the parent substances from which they can be formally derived by the substitution of the -CH=CH-group by a sulphur atom. The compounds under consideration are analogues of tropylium (I) [thiapyrylium (II), 1,2-dithiylium (III), l,jdithiylium (IV)], beneotropylium (V) [l-thianaphtylium (VI), 2-thianaphtylium (VII), benzo-l,+iithiylium (VIII)], azulene (IX) [thialene (X), isothialcne (XI)], tropone (XII) [a-and Y-thiapyrones (XIII,XlV), derivatives of 1,2-and 1,3-dithiylium (XV,XVI; Y=O,S)] and tropolone (XVII) [3hydroxythiapyrones (XVIII~ Y=O,S)] (Fig. 1). accept the compounds nos. XIII-XVI, already known for a longer time, all these substances have been synthesized recently. l-11 The compounds II and VIII were studied * Machova 7, Prague 2 -Vinohrady, Czechoslovakia.