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Book Review Aspects of Organic Photochemistry. By W. M. Horspool

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the tables. The sixth chapter (100 pp.), “Choice of Reagents
Used in Analytical Chemistry”, contains a collection of the
formulas, names, and most important properties of organic
reagents, and thus forms the requisite supplement to the preceding chapter.
The book is intended for a wide circle of readers and users,
each of whom will find in it something useful and worthwhile.
The student can certainly draw some gain from the very
elementary theoretical chapters; users of organic reagents will
use the practical chapters with success. Certain deficiencies,
however, should not be overlooked.
Fritz Umland [NB 351 IE]
Sensors such as are used in medicine and environmental
surveillance are described, as are controllers and switches,
all with the same clarity noted above. Perhaps more space
could be secured for this part of the book by deleting sections
such as those on electrochemical thermocouples, radiation
dosimeters, and coulometric determination of layer
thicknesses.
The book, which construes the term “components” in a
very broad sense, can be recommended both as a review
and as a reference work. The 603 references provided facilitate
entry into the original literature.
Ferdinand u. Sturm [NB 353 IE]
Laborpraxis-Quantitative Analyse. (Laboratory PracticeQuantitative Analysis.) By W Feler and C. Rathe. Verlag
Chemie, GmbH, Weinheim 1976. 1st edit., 128 pp., 21 figs.,
paperback, D M 12.80.
This book deals with gravimetry and mass analysis.
Although the theoretical foundations of these methods are
sometimes treated too skimpily, many general, useful, and
valuable tips are to be found in the practical part. Procedures
for some selected gravimetric determinations are described
in detail, namely individual determinations of iron, nickel,
aluminum, sulfate, and calcium, and separations of iron from
nickel, calcium from magnesium, lead from copper. The massanalytical part contains neutralization volumetric analysis,
precipitation volumetric analysis, complexometry, and the
most important procedure of redox volumetric analysis
(permanganometry, chromatometry, and iodometry). Detailed
experimental procedures supplement the theoretical considerations of these methods. The book is thus of interest
above all to the experimentalist, i. e. the laboratory assistant
or chemical technician, but also to the student in his first
semesters.
More recent methods, such as precipitation from homogeneous solution or titration with the aid of ion-selective
electrodes, are not described. On the credit side, errors are
considered along with the detailed analytical directions; questions and exercises (with answers) stimulate the reader to
think for himself. Unfortunately, the book suffers from a
number of printing errors.
Siegbert Pantel [NB 352 IE]
Aspects of Organic Photochemistry.By W M . Horspool. Academic Press Inc., Ltd., London 1976. 1st edit., 290 pp., bound,
E 9.50.
According to the Preface, this book was written as an
introduction for undergraduates and graduates facing their
final examination. It is divided into nine chapters: introduction
to the physical principles of photochemistry, experimental
methods, the Woodward-Hoffmann rules, photochemistry of
unsaturated and aromatic compounds, reactions of ketones,
photochemistry of enones, oxidation and reduction reactions
and finally “miscellaneous” reactions.
The main part of the book (about 200 out of its 280 pages)
is devoted to preparative organic photochemistry. The author
has taken great trouble to make the wealth of material easier
to follow by extensive subsectioning; that this has been only
partly successful is due to the involved and often inexact
description of the contents.
The first chapters-“Physical Principles” and “The Woodward-Hoffmann Rules”-are inadequate as an introduction.
Besides very vague statements (e.g. on p. 17, “Thus the molecules in the excited state are considerably more reactive in the
excited state and endeavour to return to the ground state
as rapidly as possible”), the text also contains a large number
of serious errors which must lead to considerable confusion.
One could perhaps use this book together with others when
collecting information on a specific class of reactions ; however,
it cannot be recommended as a beginner’s introduction to the
field of organic photochemistry.
Karl-Heinz Grellniann [NB 354 IE]
Elektrochernische Bauelemente (Electrochemical Components). By A . F . Bogenschiitz and W Krusemark. Verlag
Chemie GmbH, Weinheim 1976. 1st edit., x, 247 pp., 211
figs., 26 tables, bound, DM 145.-.
The coulometer, developed by Faraday in marketable form
as early as 1840, and the electrolytic capacitor, now about
100 years old, are among the components that still hold an
undisputed position in electrochemical engineering. The
authors describe such perfected products but in addition do
not shirk from offering many addenda and ideas for their
development. Here we find the time switch (e.g. sea-water-activated silver/gold cells), the electrolytic information-storage
devices (e.g. metistron and memistor), electrokinetic components (e.g. the solion) and electrochromic displays.
The whole book is easy for the non-expert to read, and
is made easier to understand by the extremely instructive
drawings and circuit diagrams. One would have liked to see
more regular comparison with electronic apparatus against
which these new cells must compete. Wherever ionic mobility
is important for the operation of the apparatus the electronic
elements must win on speed. In addition, chemical material
transfer is reversible only to a limited degree, which has its
effect on the life of the apparatus. A critical assessment of
the prospects of specific developments should be incorporated
in a new edition.
Solid State Photochemistry. A Collection of Papers by G.
M . J . Schmidt and his Collaborators Describing a Symbiotic
Relationship between X-Ray Crystallography and Synthetic
Organic Photochemistry. Edited by D. Ginsburg. Monographs in Modern Chemistry, Vol. 8. Edited by H . F. Ebe/.
Verlag Chemie, Weinheim-New York 1976. 1st edit., viii,
280 pp., bound, DM 86.-.
This book, which appeared in memory of G . M . J . Schmidt
in connection with the fifth anniversary of his death, was
conceived as a report on the current state of organic solid-state
chemistry which is controlled by the topology of the crystal
structure in the sense ofminimal change in the atomic positions,
and which was called topochemistry by Schmidt in his capacity
as its founder. The concept was extended by his student Cohen
in the same sense. The title chosen by the editor is not really
accurate, since Schmidt himself drew heterogeneous gas/crystal
reactions into the range of his considerations and investigations. The greatest part of the book is occupied by reprints
of 31 publications by Schmidt and his students. From these
the preparative possibilities and the limits of the methods
become clear; short passages by D. Ginsburg as editor link
the various texts. The closing articles by M . D. Cohen, J .
D. Dunitz, and G. S. Hammond treat the present, past, and
future of the field. Cohen describes further development of
research in this area at the Weizmann Institute; Dunitz draws
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