1. Topotactic reversible phase transition between room-temperature and a new low-temperature modification in the MCl₃(THF)₃ system

   • Ulli Englert
   • Fausto Calderazzo
   • Guido Pampaloni

   OriginalPaper Pages: 237 - 243

2. Structures and energies of seleno derivatives of biuret.Ab Initio comparative studies of diselenobiuret, selenobiuret, and selenothiobiuret

   • Ali Jabalameli
   • Andrzej Nowek
   • Jerzy Leszczyński

   OriginalPaper Pages: 245 - 256

3. Steric vs. electrostatic effects in the nucleophilic addition to a hindered cyclohexanone

   • Joachim Busch
   • György M. Keserü
   • Urs Séquin

   OriginalPaper Pages: 257 - 261

4. Conglomerate crystallization in organic compounds. Part 3. the X-ray diffraction crystal structure of triphenyl methane, molecular mechanics, and quantum mechanical calculations of the structure and energetics of this molecular propeller

   • D. C. Levendis
   • I. Bernal

   OriginalPaper Pages: 263 - 273

5. Crystal structures of phenyl-substituted cyclopropanes. IV. the crystal structure (at 21‡C and −100‡C) and the phenyl ring conformation in 4-cyclopropylacetanilide

   • Ivan Bernal
   • D. C. Levendis
   • Juanita M. Cassidy

   OriginalPaper Pages: 275 - 285

6. The crystal and molecular structure of 2-methyl-2,5-diaza-3,4-benzotricyclo[4.3.3.0^1,5]dodecan-6-ol

   • Constantin A. Kavounis

   OriginalPaper Pages: 287 - 292

7. Hydration of the carboxylate group: Anab initio molecular orbital study of acetate-water complexes

   • George D. Markham
   • Cindy L. Bock
   • Charles W. Bock

   OriginalPaper Pages: 293 - 307

8. The driving force behind the rules of the valence shell electron pair repulsion model

   • I. Mayer

   OriginalPaper Pages: 309 - 311

9. Existence and estimated enthalpies of formation of ammonium hydroxide, hydronium amide, and some related species

   • Joel F. Liebman

   OriginalPaper Pages: 313 - 315

10. Book reviews

    • George Kauffman
    • Eiji Osawa

    BookReview Pages: 317 - 318