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Book Review Chemische Spektralanalyse (SeithЦRuthardt) Anleitung fr die chemische Laboratoriumspraxis (Chemical Spectral Analysis Introduction to Chemical Laboratory Practice) Vol. 1. By W

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cally produced Cr(CO),] it functions as a unidentate twoelectron ligand. 2) In (2) [formed on heating of (])] the
bicyclic behaves like a bidentate four-electron ligand
(although a structure having only one azo bridge and two
chelating ligands cannot be dismissed altogether). 3) The
bicyclic reacts with Fe,(CO), to give (3) in which the azo
group can be formally regarded as a six-electron ligand.
( I ) to (3) and some similar compounds can be sublimed
in high vacuum and are fairly stable toward air./J.
Organometal. Chem. 26, C 27 (1971)/-Kr.
[Rd 328 IE]
BOOK REVIEWS
Chemische Spektralanalyse (Seitl-Ruthardt), Anbrung
fur die chemische Laboratoriumspraxis (Chemical Spectral Analysis, Introduction to Chemical Laboratory
Practice) Vol. 1. By W. Rollwagen. Springer Verlag, Berlin-Heidelbe@ew York 1970. 6th ed., xu, 185 pp., 84
Figs, and 1 Table, bound DM 48.-.
“Chemische Spektralanalyse” has for some decades been
the most important German-language introduction to
practical emission-spectral analysis. The fundamental
principles formulated by Seith and Ruthard in their
description of sample preparation, light sources, light
conduction, spectral breakdown, radiation receivers, and
particularly evaluation still deserve the attention of all
those who wish to use emission-spectrochemical methods
of analysis. Rollwagen, who revised and expanded the
5th edition (1959), has also made some additions in
the present 6th edition. The section on photoelectric
measurement has been expanded. The determination of
gases in metals and calibration by the addition method are
discussed. The new section on Grirnm’s glow discharge
lamp must obviously have been inserted at a time when
knowledge of this interesting and important light source
was inadequate. There are many instances where failure
to revise the text is regrettable: this is so e.g. wherever
a qualitative description is given for some point that
could nowadays be presented more easily by means of a
simple formula. The required slit width and systematic
focusing steps are easier to calculate from the data for
the spectral apparatus than to find by trial and error.
These and other formulas are nowadays tools that should
not be lacking from this book, which contains so much
important information.
Huns Massmann [NB 950 IE]
The Chemistry of Inorganic Ring Systems, Parts 1 and 2.
By I . Haiduc. John Wiley and Sons Ltd., New York 1970.
1st ed., vi, 1197 pp., E1O.OO.
In 1960, Ionel Haiduc wrote a remarkable book in Romanian on inorganic ring systems. He now spotlights
this fascinating and fast-developing field of inorganic
chemistry once again in a much more comprehensive
work in English. The work is divided into two parts. The
Angew. Chem. internat. Edit. / Vol. 10 (1971) N o . 4
first deals with homocyclic inorganic ring systems and
with heterocycles whose main component is an element
of group I11 or IV. The second part covers heterocycles
whose main component is an element of group V or VI
and heterocycles that are coordination compounds containing metals. Since the assignment of the individual
heterocycles to these groups cannot always be free from
arbitrary choice, a good keyword index is helpful in finding one’s way around. A list of contents precedes each
chapter.
The work contains an abundance of material. The recent
literature is taken into account. The literature coverage is
admittedly not complete, and probably was not intended
to be so; however, the selection is excellent. All the important inorganic ring systems and their principal chemical
and physical properties are surveyed. The discussion of
chemical behavior includes substitutions that proceed
with retention of the ring system, together with their
problems, as well as reactions in Which the ring system is
opened. The physical properties are collected in tables in
many cases. The emphasis is always placed on the phenomenological. Mechanistic aspects are mentioned only
briefly. In this way the reader is acquainted with the most
important substances and their behavior. At the same
time he is directed by numerous references (about 5000)
to the original literature, from which he can obtain further
information. It is felt, however, that the chapters on
structure and bonding in inorganic rings and on inorganic
ring systems in equilibrium might have been rather more
detailed. The chapter on bonding theory contents itself
with a superficial indication of the problems. The very
stimulating chapter on inorganic rings in equilibrium,
which was written by the author at the suggestion of and
with the aid of J.R. Van Wazer, should have presented
more qualitative description.
To summarize, it can be stated that this is an outstanding
work offering an excellent introduction to the field of
inorganic heterocycles, and showing how fluid the boundaries between inorganic and organic chemistry have now
become. The inorganic heterocycles lie at a particularly
interesting junction between these regions. The book,
which is clearly and simply written, can be strongly
recommended to chemists interested in this field as well as
to students.
Margot Becke [NB 955 IE]
285
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