Synthesis, structure and properties of 3, 9, 15-tri-and 3, 6, 9, 12, 15, 18-hexasubstituted dodecadehydro [18] annulenes (C 18 H 3 R 3 and C 18 R 6) with D 6h- …
R Suzuki, H Tsukuda, N Watanabe, Y Kuwatani, I Ueda
3, 9, 15-Tris (p-tert-butylphenyl) dodecadehydro [18] annulene (6) and 3, 6, 9, 12, 15, 18- hexa-substituted dodecadehydro [18] annulenes (7, 8, and 9) have been prepared. These compounds were shown to be heated up to 150° C without decomposition. The molecular structure of 7 was determined by X-ray crystallography, which showed that 7 has a planar π- system with D6h-symmetry. The UV and NMR spectral data indicate that the four ...
