1. Topological dependency of the aromatic sextets in polycyclic benzenoid hydrocarbons. Recursive relations of the sextet polynomial

   • Noriko Ohkami
   • Haruo Hosoya

   Original Investigations Pages: 153 - 170

2. Simple molecular wavefunctions with correlation corrections

   • Orlando A. V. Amaral
   • Roy McWeeny

   Original Investigations Pages: 171 - 180

3. On the pairing of the natural orbitals for projected broken symmetry states

   • Esper Dalgaard

   Original Investigations Pages: 181 - 186

4. Electronic states of the [2 _n ]cyclophanes

   • Jens Spanget-Larsen

   Original Investigations Pages: 187 - 203

5. CEPA calculations on open-shell molecules. VI. The first ionization potential of HCO

   • Volker Staemmler

   Original Investigations Pages: 205 - 215