Synthesis of Isocyanides from N-Monosubstituted Formamides, Phosphanes, and Azodicarboxylic Acid Derivatives

✍ Scribed by Barbro Beijer; Dipl.-Chem. Ernst von Hinrichs; Prof. Dr. Ivar Ugi

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 115 KB
• Volume: 11
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197209291

✦ Synopsis

dioxide. The occupied xcc orbital is of b, symmetry (group Cz,) and can therefore mix only with the 4b, orbital ofthe sullbne group according to ( 2 ) . The first PE band of the five-membered ring sulfone (Table I : I E , ) IS to be assigned to the x level on the basis of the 121 observed vibrational fine'structure (1200 5 100cm.-' GC2 and 560 & 100 cm ' GC3). Comparison of the ionization potentials IE,,, , of the unsaturated five-membered ring (Table 1) shows that, as expected, equal contributions are found for n = 1.3.4. The small lowering f o r n = 2 suggests that the second highest occupied molecular orbital in dialkyl sulfones does have bz symmetry.