1. Approximate calculation of the matrix elements of Coulomb and exchange operators for the “core” electrons of the atoms K through Zn

   • Raffaele Montagnani
   • Oriano Salvetti

   Original Investigations Pages: 159 - 166

2. Electronic structure, geometry, and energetics of carbanion and carbocation of [1.1]ferrocenophane: An INDO study

   • A. Waleh
   • M. L. Cher
   • U. T. Mueller-Westerhoff

   Original Investigations Pages: 167 - 177

3. Directed graphs of structurally stable potential energy surfaces representing a-priori reaction pathways

   • Ariel Fernandez
   • Oktay Sinanoglu

   Original Investigations Pages: 179 - 190

4. Characteristic polynomials of large graphs. On alternate form of characteristic polynomial [1]

   • Sherif El-Basil

   Original Investigations Pages: 191 - 197

5. Fibonacci relations. On the computation of some counting polynomials of very large graphs

   • S. El-Basil

   Original Investigations Pages: 199 - 213

6. Gaussian basis sets for transition metals of the second series

   • Alain Veillard
   • Alain Dedieu

   Original Investigations Pages: 215 - 218

7. Conformational preferences of the axial ligands in some metalloporphyrins. A theoretical study

   • Marie-Madeleine Rohmer
   • Alain Strich
   • Alain Veillard

   Original Investigations Pages: 219 - 231