There is no doubt about the importance of hydration in many areas of every day life, technology, biology, medicine, science etc. During the last years many investigations have been carried out upon problems of hydration and a large amount of experimental and theoretical data has been obtained by the application of different methods. One effi cient possibility to stimulate progress in scientific problems is to come together and discuss existing results and ideas. This was the aim of the 35th Bunsenkolloquium and a subsequent seminar held in Marburg, FRG from April 2 -4, 1987 with respect to the "Interaction of Water in Ionic and Nonionic Hydrates". The meeting was attended by more than one hundred participants from 25 countries. It will be seen from the content of the chapters in this book, which comprises the introductory papers and more or less extended abstracts of research seminars, that it was possible not only to stress the advantages and disadvantages of each method, but also to show how information gained by one method can complement the results of another one in order to increase our overall understanding of hydration pheno mena. The papers are divided into sections concerning the hydration of: ions, nonionic substances, biological and macromolecular substances, surfactants as well as a section containing methods, models and theo ries, which may stimulate investigations on hydrations.

Hydration of Ions

Interactions of Water in Ionic Hydrates
The Determination of Vibrational Frequencies in H-Bonded Liquids from Molecular Dynamics Simulations
A Model of Ion Hydration
Infrared Spectroscopic Study on Anion-Hydration in CH2-Cl2
Infrared Spectroscopic Study of the Strengthening of H-bonds in Aqueous Salt Solutions
Infrared Studies of Ionic Hydration in Aqueous Solutions
Interactions of Cations of the Mn(II) - Zn(II) Series with Water in Solutions: Isopiestic and Spectral Results
Raman Spectroscopic Investigations Concerning the Solvation Behaviour of Aluminium Chloride in Mixed Solvents
Dissociation Field Effect of MgSO4 Ion-Pair Hydrates
Hydrogen Bonding and Dehydration in Selenate Hydrates
Water Molecules in Solid Hydrates - Correlation of Spectroscopic and Crystallographic Data
Stretching Frequency Versus Bond Distance Correlation of H-Bonds in Crystalline Hydrates: The Role of the Proton Acceptors
Uncoupled HDO Modes Caused by Metal Guest Ions in Crystal Matrices
Water in the Hydro-Sodalite System Na6+x, (AlSiO4)6(OH)x ·nH2O with 0? x? 2 and 0? n? 8
On the Interpretation of Isotope Effect in Mössbauer Spectroscopy
Isotope Effects on Nuclear Shielding as a Means of Studying Solute-Solvent Interactions
Molecular Reorientations and Local Structure in Nitrate Aqueous Solutions
Hydration of Nonionic Substances
Similarities and Differences in Ionic and Nonionic Hydrates
Mixed Hydrogen Bond Chains
Dilute Aqueous Solutions of Nonelectrolytes: Recent Advances
Thermodynamics of DMSO Hydration
NMR Relaxation in Clathrate-Hydrates
NMR of Inert Gases in Aqueous Solutions
Fluctuations of Thermodynamic Properties of Supercooled Liquid Water
Ab Initio Calculations and Many Body Analysis of the WaterTetramer
Hydration of Biological Macromolecular Substances
Solvent Effects on the Structural Stability and Interactions of Globular Proteins: The Role of Cooperativity and Repulsive Restraints
Exchange of the Structural Water and Molecular Dynamic in Collagen
Hydration Effects on Photosynthetic Membranes and Proteins
Photosynthesis: Dynamics of Proteins and Charge Transfer
Infrared Spectroscopy of Hydration Effects in Photosynthetic Reaction Centers
Intramolecular Protontransfers in Bacteriorhodopsin Monitored by Fourier Transform Infrared Difference Spectroscopy
Hydration of Chlorophyll a
The Reaction of NO and SO2 in the Presence of Water as a Possible Reason for the Destruction of Chlorophyll in the Wetterstein-Mountains (Bavaria)
A Simple Microwave Argument about the Changes of Structure of Water in Solutions of Macromolecules
IR-Spectroscopic Studies on the Hydration of Polyglycolethers
The Role of Ion Hydration in the Biological Effect of Alkali Cations
Water Permeation Measured by Solvent Isotope Effects
The Physical State and Energization of Biological Membranes Regulate Permeation of Water, Electrolytes and Non-Electrolytes
Structure and Dynamics of one Dimensional Ionic Solutions in Narrow Transmembrane Channels - A Molecular Dynamics Simulation Study
Computer Simulations of Water Interactions Near Single Crystal Surfaces
Hydrogen Bond Connectivity of Water in Hydrophilic Confinements
Water and Surfactants
Water and Solvents on Surfaces Bristling with Alkyl Chains
Hydrophile-Lipophile-Balance and Interfacial Tensions in Water-Hydrocarbon-Surfactant Systems
Raman Spectroscopic Analysis of Surfactants in the Neat, Monomeric and Micellar Phases
Effect of Temperature and Aprotic Solvents on the CMC of Sodium DodecylSulphate
Methods, Models and Theories
Matrix Isolation Spectroscopy of Low Stoichiometry Complexes between Water and Sulfur Dioxide
Infrared Photodissociation of the H2O:HI Complex Trapped in Solid Nitrogen. Comparison with the CH3CN:HI Complex
Neutron Scattering and Infrared Spectroscopy of H2O Molecules Isolated in Diverse Cryogenic Matrices
Ab Initio Studies of Complexes Formed by HF and HCL with H2O
Frequency Shifts of Carbonyl Streching Bands Induced by Solvents
Accessibility of the Lone Pair and Hydrogen Bonding Site in Biological Systems
Infrared Spectroscopy - A Reliable Source of Information on Hydrogen Bonding?
On a "Critical" Behaviour of Strong Hydrogen Bonds
Does an OH or an OD Group Form the Strongest Hydrogen Bond to Oxygen?
Phase Transition in Solid 2,3,3-Trimethylbutan-2-ol Hemihydrate (TMBH)
The Influence of the Structure of Water on Chemical Reactions
Cartesian-Spherical Transformation Formalism and the Theoretical Insight into Many-Body Long-Range Forces of the Electrostatic Origin in Multimolecular Systems
Authors Index.