close

Вход

Забыли?

вход по аккаунту

?

Book Review Non-Metal Rings Cages and Clusters. By J. D

код для вставкиСкачать
the two constitute a valuable supplement to the CAS databases.
In this connection it would be useful if the CAS Registry
Numbers were available in the text as well as in the indexes
so that one could move more easily from one reference work
to the other.
The overall impression of the volumes reviewed is excellent, and how could it be otherwise for this standard work on
organic chemistry with its new, up-to-date format? Both the
publisher and the Institute have done everything possible to
make “Beilstein” attractive to the synthetic chemist. He
should make the most of what is offered.
Heinrich Heydt, Manfred Regitz [NB 1033 IE]
Fachbereich Chemie
der Universitat Kaiserslautern (FRG)
Non-Metal Rings, Cages and Clusters. By J. D. Woollins, Wiley, Chichester 1988. ix, 124 pp., hardcover, E 25.95. ISBN 0-471 -91 592-0
The rapid progress made during the last 25 years in the
chemistry of cyclic nonmetal compounds is still not reflected
in the contents of most textbooks. This very area, however,
is particularly well suited to making students clearly aware,
at an early stage, that the chemistry of all nonmetal elements
(including carbon) forms a unified whole. Therefore, this
introductory book, which originated as the text of a lecture,
unquestionably fulfills a real need by serving as an appetizer
to this area of chemistry.
After a short presentation of the most important fundamental concepts and synthetic strategies, the following three
chapters discuss a series of exemplary nonmetal ring systems,
from electron-deficient compounds and classical (“electronprecise”) compounds to electron-rich compounds. Understandably, the limited coverage of the book necessitates a
somewhat arbitrary selection ofcompounds or, as the author
puts it, the selection “should be regarded as my choice from
a very large box of chocolates”. However, the limited number of compounds makes it possible to indicate numerous
relationships and structural similarities between different
classes of compounds. This feature is especially valuable for
students, who, all too often, organize their chemical knowledge in separate boxes according to element symbols. In this
respect, however, it would have been useful to have included
at least some examples of cyclic hydrocarbons.
The chapter on electron-deficient compounds contains a
good overview on structures, bonding, syntheses, and properties of boron-hydrogen compounds and metallaboranes.
The importance of ‘H and “ B NMR spectroscopy for structural elucidation is made clear through several representative
spectra. However, the section on polyhedral boron subchlorides is much too short, while the fragmentary treatment of
transition-metal clusters could have been omitted in view of
the book’s title.
The chapter on normal (“electron-precise”) compounds
covers the most important homo- and heterocyclic ring systems of sulfur, phosphorus, and silicon. The cyclic silicates
and metaphosphates are not mentioned, since this would
have exceeded the intended coverage of the book. Lacking in
the discussion of homocyclic silicon compounds is mention
of the three-membered ring as well as of the existence of
fused ring systems; this also holds true for the large number
of corresponding silazanes. Similarly, the discussion of phosphorus omits mention of the interesting cyclic acid anions
with P-P bonds.
The last chapter on electron-rich compounds presents a
concise discussion, illustrated by numerous formula
schemes, of what is currently known about borazenes, phosphazanes, phosphazenes, sulfur-nitrogen rings and cages,
and polychalcogen cations.
The book is directed at undergraduates with the goal of
awakening their interest in this area of molecular chemistry.
Helpful in this respect is the list of references, in particular
key review articles, at the end of each chapter. Furthermore,
the two-volume work of Haiduc-Sowerby is recommended as
a source of additional information.
Not surprisingly, the treatment of such a huge amount of
information and the attempt to systematize it leads to some
errors. Apart from obvious typographical errors (like the
name Gillespie on page 5), these can sometimes lead to confusion, especially for students. For example, on page 7, the
formation of P,H, from P,H, is not a polymerization. On
page 15 (sixth line from the bottom), electron pairs would be
correct; on page 49, dichlorodisulphane; on page 54, P,H,
and P,H,; on page 55 in Fig. 3.1 1, Li,P,,; and on page 67 in
Fig. 3.18, P,0,30. The “equation” for the synthesis of P,H,
(page 54) is incomprehensible and the formation of P,Me,
(page 55) is not a redox reaction with evolution of elemental
chlorine. In addition, several references to the literature contain errors.
Despite these privisos, this highly readable book offers an
initial, informative overview of the heterogeneous area of
cyclic nonmetal compounds and is also suitable as an introduction to those wanting to study nonmetal rings and cages.
Moreover, chemists interested in preparative and structural
chemistry will find the book highly interesting. The book is
excellent in appearance, although somewhat overpriced.
Marianne Baudler [NB 1039 IE]
Institut fur Anorganische Chemie
der Universitat Koln (FRG)
Industrial Inorganic Chemistry. By W Biichner, R. Schliebs,
C . Winter and K. H . Biichel. Translated by D. R. Terrell.
VCH Verlagsgesellschaft, Weinheim/VCH Publishers,
New York 1989. 614pp., hardcover, DM 145.00. ISBN 3-527-26629-1 10-89573-610-1
This English translation of a 1984 German edition has
been updated and supplemented with data from the US.
industrial inorganic chemicals market. The original authors
were all with Bayer AG in 1984, and have produced a book
which includes a broad range of “technical chemistry”. It is
organized into “primary inorganic materials” (H,, H,O,
peroxides, N-compounds, P-compounds, S-compounds,
halogen compounds, metals and their compounds), then into
product classes (mineral fertilizers, silicones, zeolites, inorganic fibers, construction materials, ceramics, wear-resistant
materials, pigments) as well as nuclear fuel principles and
production. The organization by element makes it ideal for
lecturers wishing to illustrate an inorganic chemistry course
with applications (e.g., video cassettes, optical fibers, microelectronic devices).
The advertising claims that economic aspects, process energy balance and ecological consequences are treated, and
that the intended use is not only the classroom (abundant
marginal notes repeat central points of the text), but also in
business and law. Indeed, there is an abundance of tables of
workable terrestrial reserves, of production, and of consumption (e.g., annual asbestos production, by country, to
six significant digits!). Ecological matters are treated only
Документ
Категория
Без категории
Просмотров
1
Размер файла
149 Кб
Теги
clusters, book, metali, cage, non, ring, review
1/--страниц
Пожаловаться на содержимое документа