1. Calculation of the molecular parameters of small-ring unsaturated hydrocarbons by a refined ω-technique

   • E. A. Dorko
   • H. P. Nielsen
   • W. C. Bahr

   Commentationes Pages: 357 - 362

2. A 2pπ, 3dπ valence bond wave function for the ¹B_1u state of ethylene

   • Aage E. Hansen

   Commentationes Pages: 363 - 369

3. Non-empirical LCAO-MO-SCF calculations with gaussian type functions on the electrocyclic transformation of cyclopropyl to allyl

   • D. T. Clark
   • D. R. Armstrong

   Commentationes Pages: 370 - 382

4. Symmetry properties of the Hückel matrix

   • U. Wild
   • J. Keller
   • Hs. H. Günthard

   Commentationes Pages: 383 - 395

5. Bent bonds in cis-1,2,3-tricyanocyclopropane

   • Z. B. Maksić
   • Lj. Vujisić

   Commentationes Pages: 396 - 401

6. Molecular orbitals for components of adenosine triphosphate

   • Donald B. Boyd

   Commentationes Pages: 402 - 410

7. Structure électronique de quelques dérivés nitrés du dibenzotétrazapentalène

   • Maurice Bonnet

   Relationes Pages: 411 - 414

8. Electronic structures of pyridine N-oxide and 4-nitrosopyridine N-oxide

   • Shunske Kobinata
   • Saburo Nagakura

   Relationes Pages: 415 - 419

9. Ultraviolet spectra of, and SCF MO calculations on 6a-thiathiophthens

   • R. A. W. Johnstone
   • S. D. Ward

   Relationes Pages: 420 - 425

10. Semiempirical calculations of singlet-triplet and triplet-triplet transitions

    • J. Pancíř
    • R. Zahradník

    Relationes Pages: 426 - 428

11. Extended Hückel calculations on polypeptide chains

    • A. Rossi
    • C. W. David
    • R. Schor

    Relationes Pages: 429 - 431