✍ Scribed by H. P. Figeys; B. Wilmet-Devos
No coin nor oath required. For personal study only.
The frequencies of the 'L, transitions of polycyclic aromatic aldehydes are related linearly to the energy gap between the highest bonding and the lowest anti-bonding orbitals in these molecules calculated by an iterative Huckel-L. C. A.0.-method. Solutions of the same derivatives and tetracyanoethylene in chloroform show a new absorption band which may be attributed to a charge-transfer complex. A linear relation is found between the energies of these bands and the highest occupied molecular orbital of the aldehydes.
I. POSITION DE LA BANDE 'La
📜 SIMILAR VOLUMES
## Abstract By condensation according __Ullmann__ of 2‐iodo‐9‐oxo‐fluorene with 3‐bromo‐2‐cyano‐9‐oxo‐fluorene, followed by cyclisation and reduction, the new linear 13,15‐dihydro‐__7H__‐diindeno[2.1‐__b__; 2′.1′‐__h__]fluorene (III) is synthesized in 3 steps. The 6‐methyl‐derivative of II is also
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