вход по аккаунту


Book Review Kern- und Radiochemie (Nuclear and Radiochemistry). By R. Lindner

код для вставкиСкачать
Uber deli Ablauf organisch-chemischer Reaktioncn (Organic
Reaction Mechanisms). By S. Hrrttptmcinn. WTB, Science
Pocket Books. Akademie-Verlag, Berlin, 1963. 1st edit.
175 pp., paperback, D M 12.50 (about $3.25).
This science pocket book deals withthe multiplicity of organic
reactions on the basis of ‘electronic theory’. From this point
of view the booklet is excellent. The arrangement is clear, and
the individual reactions are grouped in such a way that their
common traits are clearly illustrated by application of electronic theory. One example of this is provided by addition reactions (Section 2.l), almost all of which are induced and influenced by mesomcric and inductive effects. Again, the representation of substitution reactions (Section 2 . 3 ) , in particular the differentiation between the individual reactions on
pp. 86-107, is particularly apt.
How do we know. however, that the molecules do in fact react
via the structures shown? Do we arrive at these ideas exclusively as a result of experience, that is, empirically? It
seems regrettable to have to read in the preface that the molecular orbital method affords the best means of answering these
queries, but that it should be left to the physicist to apply it.
In actual fact, however, the book contains such a large number of theoretical fragments which have recently found their
way into chemistry almost unnoticed that the more knowledgeable reader will perceive a lack of foundation precisely
during more fundamental discussions. The few basic principles which are mentioned frequently and which are said to
govern the processes can only be explained on a theoretical
basis. The basic concepts mentioned in the section on mesomerism are derived from the field of wave mechanics. This
provides the only possibility for explaining the numerous exceptions which are i n principle not capable of being treated on
the basis of electronic theory.
It is unfortunate that the results of the MO-LCAO method
(Huckel method) were not utilized in thc treatment of organic
reaction mechanisms, as they would make it possible to discuss the position at which the reaction is initiated as well as its
likely course, particularly with x-electron systems. In this connection, mention should also be made here of the LCBOmethod and the method of valence structures, the latter in
particular with regard to excited states. Only brief mention is
made of reaction kinetics, and the concepts of transition
states, metastabk intermediates, and activation energies are
described without much method. N o comment is made of
molecular vibrations, equilibria are not dealt with. The reader
necessarily arrives at the conclusion that there is no basis for
the discussion of the reaction processes other than that of
electronic theory. The table given on p. 7 is misleading since it
shows He with the same number of valence electrons as Be
or Mg.
The book could have been made more useful if theoretical
concepts developed during the last few years had not been
deliberately disregarded, thus introducing an unnecessary
limitation to the otherwise excellent treatment of the subject
matter. The chemist will profit more from the book if he disregards the statement made in the preface that “classical
chemical structural formulae (with additional representation
of lone pairs of electrons by dashes and of unpaired electrons
by dots) will continue to form the simplest and, generally
speaking, completely adequate method of representing the
constitution of organic compounds and the course of their
H . PreuJ [NB 140/67 IE]
Kern- und Radiochemie (Nuclear and Radiochemistryi. By
R. Lindnrr. Basic principles, practical methods, and technical application. Springer-Verlag, Berlin-Gottingen-Heidelberg 1961. 1st edit., XII, 369 pp., 140 illustrations, linen.
DM 49.80 (about $12.50).
The first half of this book, which is the outcome of a series of
lectures delivered at the Technical College in Goteborg
(Sweden), deals with the basic principles of nuclear physics,
measuring techniques, nuclear reactors, and radiation protection. The second half is devoted to radiochenijstry and
applications of radionuclides in science and technology.
The author presents a wealth of scientific information from
this wide field in concise and accurate formulations. The book
offers a good review of the whole subject and rapid orientation in the individual topics.
Unfortunately only a brief discussion of the extensive topics
of radiochemistry (r.g. methods of separation and enrichment; processes of radionuclide production; the chemistry of
the radioelements and the fission products of uranium and the
transuranic elements; chemical nuclear technology, including
the problems of processing nuclear fuels; the chemistry of reactor materials and radioactive wastes) is possible within the
framework of such a comprehensive treatment which also includes the basic phi sical principles involved and borderline
G. Scliitlze-PiNot [NR 141/70 I€]
Kunststofflechnisches Worterbuch (Dictionary of Plastics
Technology). By A . M. Wittfdir.Technical terms used in
the manufacture, processing, and use of plastics, material
testing and mold construction. Vol. 4 : German-French.
Carl Hanser Verlag, Munich 1962. 1st edit. XV, 534 pp..
numerous illustrations, linen, DM 72.- (about $18. -).
This dictionary is of great help to those who deal with plastics,
especially if they have to carry out technical correspondence
in French or German.
One inestimable advantage of this book is that the individual
terms have appended explanations to clarify their exact meaning and the sense in which they are used. It is to be welcomed
that a book is now available in which engineers, businessmen, and translators can quickly find the right expression for
many a technical term. Illustrations and sketches many of
them in fair detail - are of further help. An appendix of
methods of molding, pressing, and pressmolding, in addition
to initials and abbreviations, as well as conversion tables is
extreme!y useful.
The author and publisher have created a dictionary that is
exemplary in contents and lay-out. It can be warmly recommended to all those interested, especially since no work
of this kind has been available LIPto now.
0. Horn [NB 142/66 IE]
Registered numcs, tr.adernurks, ctc. i ~ s in
d this jorrmol, even witkout apecific indication thereof, ore not to be considered [inprotected by law.
8 1964 by Verlag Chemie, G m b H . ~- Printed in Germany by Druckerei Winter, Heidelberg.
All rights reserved. No part of this journal may he reproduced in any f o r m whatsoever, e.g. by photoprint, microfilm, or any other means, without
written permission from the publishers.
Editorial Office: Ziegelhauser Landstrasse 35, Heidelberg, Germany, Telephone 24975, Telex 04-61 855, Cable address: Chemieredaktion Heidelberg.
Chief Editor: W. Foersr . Editor: H. Griinewald.
Publishers: Verlag Chemie, G m b H . (President Eduurd Kreuzkage), Pappelallee 3 , Weinheim/Bergstr.. Germany, and Academic Press Inc. (President
Walter J . Johnson), 11 I Fifth Avenue, New York 3, N.Y., U.S.A., a n d Berkeley Square House, Berkeley Square, London, W. 1, England.
Pappelallee 3, WeinheiniCorrespondence concerning advertisements should by addressed t o Verlag Chemie, GmbH. (Advertising Manager W.Thie/),
Bergstr., Germany, Telephone Weinheim 3635, Telex 04-65 51 6. Cable address Chemieverlap Weinheimbergstr.
Angrw. Chrrn. internot. Edit. / Vol. 3 (1964)
/ No. 4
Без категории
Размер файла
146 Кб
nuclear, book, lindner, radiochemistry, radiochemie, review, kern, und
Пожаловаться на содержимое документа