Contents: R. C. Thiel, Leiden, The Netherlands; R. E. Benfield, Canterbury, UK; R. Zanoni, Rome, Italy; H. H. A. Smit, M. W. Dirken, Leiden, The Netherlands: The Physical Properties of the Metal Cluster Compound Au55(PPh3)12Cl6.- V. Chandrasekhar, K. R. Justin Thomas, Kanpur, India: Recent Aspects of the Structure and Reactivity of Cyclophosphazenes.- S. Mitra, S. Mazumdar, Bombay, India: Biomimetic Chemistry of Hemes Inside Aqueous Micelles.- M. J. Clarke, J. B. Gaul, Chestnut Hill, MA: Chemistry Relevant to the Biological Effects of Nitric Oxide and Metallonitrosyls.