Recently, the molecular structures of a relatively large number of sulphone compounds have been elucidated in the vapour phase by electron diffraction and microwave spectroscopy. The main purpose of these studies is the determination of the sulphur bond configuration and the conformational properties. This leads to the observation and correlation of characteristic structural variations as various ligands are attached to the S02 group and as comparisons are made with related molecules. Today it may be said that the structure of sulphone molecules is relatively well studied, and it appeared necessary to systematize the accumulated experimental data after critical considerations. This is done in the first part of this monograph. The second part presents the observed characteristic structural variations. Attempts are made to interpret these variations by valence shell electron pair repulsions and-non-bonded interactions. Correlation relationships between geometric and vibrational parameters are also presented. It is the metrical aspects of the molecular structure which are primarily considered. Since they correlate with other aspects of the molecular structure, e.g. electronic, it is hoped that the experimental information on the molecular geometry provides stim ulus for further experimental, and, in particular, theoretical work on sulphones and related systems. IV It is attempted to cover all electron diffraction and micro wave spectroscopic investigations on sulphone molecules to date. Admittedly, however, relatively larger weight is given to the electron diffraction studies originating from the author's own laboratory.
Recently, the molecular structures of a relatively large number of sulphone compounds have been elucidated in the vapour phase by electron diffraction and microwave spectroscopy. The main purpose of these studies is the determination of the sulphur bond configuration and the conformational properties. This leads to the observation and correlation of characteristic structural variations as various ligands are attached to the S02 group and as comparisons are made with related molecules. Today it may be said that the structure of sulphone molecules is relatively well studied, and it appeared necessary to systematize the accumulated experimental data after critical considerations. This is done in the first part of this monograph. The second part presents the observed characteristic structural variations. Attempts are made to interpret these variations by valence shell electron pair repulsions and-non-bonded interactions. Correlation relationships between geometric and vibrational parameters are also presented. It is the metrical aspects of the molecular structure which are primarily considered. Since they correlate with other aspects of the molecular structure, e.g. electronic, it is hoped that the experimental information on the molecular geometry provides stim ulus for further experimental, and, in particular, theoretical work on sulphones and related systems. IV It is attempted to cover all electron diffraction and micro wave spectroscopic investigations on sulphone molecules to date. Admittedly, however, relatively larger weight is given to the electron diffraction studies originating from the author's own laboratory.
Über den Autor
Istvan Hargittai is a physical chemist and professor emeritus (active) at the Budapest University of Technology and Economics. He is a member of the Hungarian Academy of Sciences and the Academia Europaea (London), and a foreign member of the Norwegian Academy of Science and Letters (Oslo). He is a PhD and DSc, and has honorary doctorates from Lomonosov Moscow State University, the University of North Carolina, and the Russian Academy of Sciences. He is the Editor-in-Chief of the international periodical Structural Chemistry (Springer). He has authored and edited numerous books about structural chemistry, history of science, the nature of scientific discovery, memorials of scientists, conversations with famous scientists, and other topics. His books have appeared in English, Hungarian, Russian, German, Swedish, Italian, Japanese, Chinese, and in the Farsi language.
Magdolna Hargittai is a physical chemist and a research professor of structural chemistry at the Budapest University of Technology and Economics. She is a member of the Hungarian Academy of Sciences and the Academia Europaea (London). She is a PhD and DSc, and has an honorary doctorate from the University of North Carolina. In addition to her research in structural chemistry, she has been interested in the lives and careers of women scientists and has lectured and published a monograph, Women Scientists, about this topic. She and her husband, Istvan, have joinly worked and published extensively on symmetry, science history, conversations with famous scientists, and, lately, the memorials of scientists in great cities. Her books have appeared in English, Hungarian, Russian, German, Swedish, and Korean. The Hargittais live in Budapest. Their son is a professor of chemistry in the United States and their daughter is a professor of communication studies in Switzerland.
Inhaltsverzeichnis
One: Molecular Geometries.- Experimental determination of the molecular geometries.- The determined structures.- Two: Structural Variations.- Conformational properties.- Characteristic variations in the bond angles and bond lengths.- Comparison of analogous sulphone, sulphoxide and sulphide geometries.- Geometrical variations in the rest of the molecule.- Correlation between geometric and vibrational parameters of the SO2 groups.- References.
