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The present volume, "Manganese" D 5, continues the description of
the manganese complexes. The arrangement of the complexes in these
D volumes is based on the ligand type. The introduction, on p. 1,
shows the classes of complexes, which have already been described
in Chapters 1 to 21 in the Volumes D 1 (1979), D 2 (1980), D 3
(1982), and D 4 (1985). In Chapters 22 to 29 of this volume are
treated complexes with amine-N-polycarboxylic acids,
hydrazinecarboxylic acids, amides, hydrazides, derivatives of
hydroxylamine (e.g., hydroxamic acids), oximes and nitroso
compounds, azo compounds, and triazenes. A survey at the beginning
of each of these sections gives information on the most
characteristic features of the various complex types. Because of
the complexometric relevance of the complexes with
amine-N-polycarboxylic acids, there are many studies concerning the
existence and the stability of the complexes in solution. Numerous
X-ray investigations, reported for the complexes with urea or with
amides and hydrazides of carboxylic acids, show the different
structures of the compounds as a result of the varying bonding
sites of the ligands. Complexes with hydrazides (e.g., with
isonicotino hydrazide) are of special interest, due to their
biological activity. Complexes with hydroxamic acids, oximes or azo
compounds have been studied mostly in aqueous organic or pure
organic solvents. The characteristic intense colors of many
solutions are used for the analytical determination of manganese.
The present volume "Manganese" D 6 continues the description of the
manganese com- plexes. The introduction on p. 1 shows the classes
of complexes that have already been described in Chapters 1 through
29 in Volumes D1 to D 5. Complexes with Schiff bases and related
compounds (e.g., hydrazones, semicarbazones, or thiosemicarbazones)
are now described in Chapters 30 and 31 of this volume and
complexes with carbazones, thiocarba- zones and formazans in
Chapter 32. Complexes with Schiff bases play a central role in the
development of coordination chemistry. The publications range from
synthetic aspects to modern physicochemically or biochemically
relevant investigations on these compounds. The huge number of
studies results from the fact that these ligands may contain
various donor atoms, in addition to the azomethine group, and thus
can occur with variable denticities. About 1700 compounds derived
from 808 different ligands are described in the present volume.
Their arrangement is by ligand type and number of azomethine
groups.
Of system-number "Manganese," Part B, which de- scribes the Element
Manganese, has been completed. Also completed is Part C, describing
the compounds, with 10 volumes. Part A will present the history and
occurence of manganese. Volume A 1 on the history has already been
published, the other volumes dealing with occurence of manganese
are in preparation. Part D is devoted to the coordination
compounds. Part D 1, D 2, D 3, D 4, D 5 and D 6 thereof are already
available. The present volume "Manganese D 7" continues the
description of the coordination compounds. Complexes with nitriles,
with nitro-hydrocarbons, and with ligands containing sulfur,
selenium or tellurium are described. Many of the coordination
compounds containing sulfur are of analytical or biological
interest. A formula index lists the ligands and the empirical
formulas.
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