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Book Review Boranes in Organic Chemistry. By H. C. Brown

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and lead to a narrower molecular weight distribution with
a remarkable increase in molecular weight (qred3-3.6 dI/g
as compared with 2.1 3 dl/g). [DOS 2206386, Wacker-Chemie
GmbH, Miinchen]
[PR 187 IE-W]
Combustion-resistant acrylic glass based on methyl methacrylate and phosphoric acid or esters of phosphoric acid are
obtained by copolymerization with bromophenyl methacrylates (pentabromophenyl, dibromophenyl, and tribromo-
phenyl methacrylate). The softening point is only slightly
depressed (Vicat values between 120 and 133°C) by this addition. 5 to 10wt.-% of ( I ), phosphoric acid, or tris(bromocresy1)
phosphate are used as the phosphorus derivative. [DOS
2202791, Rohm GmbH, Darmstadt]
[PR 188 I E-W]
Electrophoretic binders for cationic deposition that crosslink
at high temperatures consist of a synthetic resin containing
hydroxyl groups, which is partly allowed to react with a
polyisocyanate blocked at one end, and also containing amino
groups. The resin is dispersed in water by quaternization
with lactic acid or acetic acid. As an example, a bisphenol
A epoxy resin with an equivalent weight of 910 is allowed
to react in N-methylpyrrolidine with a 2,4-toluene diisocyanate
blocked at one end with 2-ethylhexanol, and dimethylamine
is then added to react with the epoxide residues. The resin
is dispersed with acetic acid in water. Binders that can be
deposited cathodically offer improved protection against corrosion and d o not attack phosphate protective films as readily
as anionic binders. [DOS 2252536; PPG Industries, Inc.,
Pittsburgh, Pa. (USA)]
[PR 190 IE-W]
Einfuhrung in die Physik (Introduction to Physics). By R.
Fleischrnann. Verlag Chemie GmbH-Physik Verlag, Weinheim/Bergstr. 1973. 1st ed., xviii, 677 pp., 436 figures, 60
tables, bound D M 65.--.
This book, which is based on a series of lectures, resembles
Pohl‘s textbook in that it introduces and explains the essential
physical concepts with the aid of briefly described experiments.
Care is taken to distinguish clearly between quantities that
should be kept conceptually separate, such as the inertial
mass and the gravitational mass. This and other similar didactic measures may enable the author to achieve his aim of
guarding the beginner (to whom the book is primarily
addressed) as far as possible against the usual errors.
Special mention should be made here of the consistent references to the dimensions to be used and to the units, which
are listed in a separate section at the end of the book. Here
one also finds very useful tables for the conversion of units,
for conversion to moving reference systems according to theory
of relativity, for the mathematical use of scalars, of vectors
and tensors, etc.
As far as the choice of subject matter is concerned, the book
confines itself mainly to physical processes that can be approximately described and understood in terms of a mental picture.
This does not mean, for example, that the wave nature of
material particles is ignored, but the predominantly theoretical
conclusion from wave and quantum mechanics (Schrodinger
equation) play only a minor part in the book. In the field
of thermodynamics, one of the concepts that are not easy
to grasp and d o not lend themselves to mental imagery is
entropy; the discussions on this topic are probably not easy
for the beginner to understand. On the other hand, there
is a brief but nevertheless sufficiently informative description
of the areas of physics that are vital to modern investigations
in nuclear physics.
The physical laws are examined in the book with the aid
ofa variety of numerical examples. The examples unfortunately
contain a number of discrepancies, which are particularly
likely to trouble the student since he will probably assume
that the values were obtained by some conversion or other,
whereas they are actually simple errors of calculation. Discrepancies of this kind are also to be found in the tables, but
these can easily be eliminated in a second edition.
Klaus Schufer [NB 195 IE]
Boranes in Organic Chemistry. By H . C. Brown. Cornell University Press, Ithaca-London
1972, 1st ed., xiv, 462 pp.,
numerous figures, bound S 24.50.
The new “H.C.B.” is based on a series of lectures given at
Cornell University in the autumn of 1969. The book is both
more and less than its title suggests. Not only are the “Prolog”
and the “Epilog” autobiographical in content, but the “life
history” is also reflected by the choice of material and the
emphasis in the presentation of all the other chapters. Thus
the author’s work on free radicals, steric effects, and (how
could it be otherwise?) even on the problem of non-classical
carbenium ions have been incorporated into the “boron book”.
Everything is considered from the view-point of the old campaigner. This is naturally also true of the actual “main”
chapters, the “Selective Reductions”, the “Hydroboration”,
and the “Organoboranes” and their reactions, among which
the reactions with carbon monoxide, the alkyiations, and freeradical reactions receive sections to themselves. The author’s
priorities are illustrated by the following example: The varied
reaction of carbon monoxide with organoboranes, which has
been dealt with by the author in numerous publications, is
given 15 subsections with no fewer than 28 pages. The oxidation of organoboranes with N-oxides is not mentioned once
in the entire book, though three sections covering 6 pages
are devoted to the oxidations of the organoboranes.
The reader will derive special enjoyment and many a smile
from numerous passages. The author expresses himself in
so many places in his own characteristic manner. The descriptions ofthe ways in which results were achieved are interesting.
Anqrw. Chmz inirrnai. Edif. f VM. I3 ( 1 9 7 4 ) 1 No. 6
This will be useful to younger readers. particularly since such
relationships usually cannot be found in the literature.
The book, which has a subject index and is otherwise excellently presented, is a very good source of information on
“H. C. B.” chemistry. A broader outlook results from the fact
that the author has been practising chemistry for a long time
in company with many worthy colleagues. However, the subject
indicated by the title of the book is by n o means exhaustively
discussed. The book can be recommended to any critical
reader. No library should be without this excerpt from the
contemporary history of chemistry .
Rolund Kiister [NB 202 E]
Ullmanns Encyklopadie der technischen Chemie (Ullmann’s
Encyclopedia of Industrial Chemistry). Editorial board : E.
Burtholome: E. Biekert, H. Hellmann, and H . Ley. Edited
by H . Buckolz-Meisenkeimer.
Vol 1 : General Principles of Process and Reaction Technology. Verlag Chemie, Weinheim. 4th Edit. 1972. xx, 644
pp., 328 figs., 132 tables, bound D M 315.--. Subscription
price DM 285.--.
Vol. 2: Process Technology I (Unit Operations). 1972. xx,
764 pp., 949 figs., 92 tables, bound D M 3 15.-.
Vol. 3: Process Technology I1 and Reaction Equipment.
1973. xvi, 592 pp., 630 figs., 104 tables, bound DM 315.-.
Three of the planned six systematic volumes of the new edition
of “Ullmann”, publication of which was started in 1972, are
now available; the first of the eighteen alphabetic volumes
has meanwhile also appeared. Despite the change of publisher
(the new edition is published by Verlag Chemie), the wellproven basic concept of the third edition has been kept
unchanged“]. The editorial board has wisely decided to revise
the work completely instead of continuing it in the form
of supplementary volumes. The latter possibility would have
had the advantage of giving a more up-to-date result, but
the unity and clarity offered by the new edition are probably
more important to most of those who use the work, since
true up-to-dateness can only be achieved by following the
latest original publications.
The present three volumes, together with the fourth volume
(Process Development and Plant Design), which has not yet
been published, are descended from Volume 1 of the third
edition. The enormous development that has taken place in
chemical process technology during the past 20 years is clear
simply from the greatly increased size of this systematic part.
This is true in particular of the theoretical grounding and
penetration of the field. For this reason the work as a whole
begins with a special volume on scientific principles. This
is followed by two volumes dealing with the unit operations
of process technology together with the associated equipment,
as well as general fields of process technology such as heating
and cooling, materials, and pressure and vacuum technology.
The volume on basic principles (Vol. 1 ) consists of the following
sections: Chemical Thermodynamics (53 pp.), Estimation of
Physicochemical Properties of Gases and Liquids (28 pp.),
Fluid Dynamics (35 pp.), Heat Conduction and Heat Transfer
(13 pp.), Diffusion and Mass Transfer (28 pp.), Chemical Kinetics (36 pp.), Dimensional Analysis and Similitude (16 pp.),
Principles of Chemical Reaction Engineering (75 pp.),
Statistical Methods in the Planning and Evaluation of Experiments (68 pp.), Optimization (58 pp.), Mathematics (194 pp.).
The essential contents of the individual sections are definitions
and explanations of the fundamental concepts and derivations
of the fundamental relationships. Examples are given to illustrate theoretical methods arising from these discussions; special mention may be made of the mathematical determination
Angew. Chc,m. inrrrnat Edit.
1 Vol
13 ( 1 9 7 4 ) J N o 6
of material values and the statistical planning and evaluation
of experiments.
The bibliographies at the end ofeach contribution are designed
primarily to enable the reader to obtain further and more
advanced information from monographs on the subject. All
the contributions (written by a total of ten authors, all but
one of whom work at universities) are characterized by clear
and impressive presentation; this gives the volume a wellrounded and unified character.
Whereas the first volume had no equivalent in the previous
edition, the next two volumes really are a new edition of
the previous first volume, i. e. a thorough revision.
Volume 2 contains the sections : Size Reduction and Classification (80 pp.), Mineral Dressing (62 pp.), Mechanical Separation Processes for Two-Phase Systems (105 pp.), Mixing
(63 pp.), Size Enlargement (31 pp.), Heating and Cooling
(143 pp.), Physicochemical Separation Processes (241 pp.).
Volume 3 follows with contributions on: Materials and Noise
Prevention (82 pp.), Pressure and Vacuum Technology (47
pp.), Conveying (54 pp.), Refrigeration and Cryogenics (67 pp.),
Electrolvsis(51 pp.). Photoreactions(l5pp.).Reactors(277 pp.);
thecontribution on reactors is furtherdivided into thesections:
Homogeneous Gas and Liquid Phase Reactions (34 pp.),
Liquid-Liquid and Gas-Liquid Reactions (40 pp.), Noncatalytic Reactions with Solids (70 pp.), Reactions on Solid Catalysts
(54 pp.), Electrothermal Furnaces (24 pp.).
The contributions are all divided into several subsections,
generally written by different authors. For example, the contribution on physico-chemical separation processes (Vol. 2) consists of the parts: Distillation and Rectification, Liquid-Liquid
Extraction, Absorption, Adsorption, Diffusion Separation
Methods, Evaporators, Sublimation, Crystallization, Fractional Crystallization from the Melt, Separation by Freezing,
Drying, Extraction of Solids. The number of authors who
have contributed to Volumes 2 and 3 (49 and 35 respectively)
is accordingly much greater than for Volume I; in the established Ullmann tradition, these are all acknowledged experts,
mainly from industry.
The contributions describe the particular principles and the
practical execution of the procedures for the sector in question.
The construction and operation of the equipment are thoroughly explained with the aid of illustrations; methods for
the calculation and design of equipment are also dealt with
in exemplary fashion.
In view of the extensiveness of the subject matter and its
division into individual topics, as occurs in Volumes 2 and
3, and indeed as is necessary for a thorough presentation,
overlapping has been unavoidable. One should also bear in
mind that the division of the material undoubtedly depended
in part on the authors who were available. The reviewer
nevertheless feels that a more rigorous subdivision would
have been possible in particular in the sections on “Heating
and Cooling” and “Reaction Equipment”, in the interests
of a more unified and better-balanced description of these
fields. In the section on Reaction Equipment, for instance,
roasting processes are certainly overstressed, above all when
one considers that they occupy almost as much space as
the contributions on heterogeneously catalyzed gas reactions
in fixed beds and in fluidized beds together. Reactors for
radiation-chemical reactions, apart from photoreactions, are
not discussed; this omission should be corrected in the alphabetic part. This is also to be recommended for the key words
“Storage”, “Aseptic Production Techniques”,“Tabletting” : the
first as a fundamental operation that is important for all
types of chemical plants, and the last two as processes that
are used e. g. in the packaging of pharmaceuticals.
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