Schiff base metal complexes as ligands1

Publisher Summary In this chapter, one attempts to present a review giving emphasis to these new fields, and to this end as much material as possible has been subdivided under the headings of the various techniques and types of information. As a result of the chosen subdivision, certain aspects, such as the nature of the metal-to-ligand bonding are discussed in more than one section. Little mention will be made of the analytical uses of these ligands, which have recently been reviewed separately (711), of the synthesis of ring-substituted derivatives of the parent ligands, although a potentially useful method using transition-metal complexes has been reported; or of related species, such as 4,4‘-bipyridyl. The coverage of the literature is complete up to the end of 1967, and usually to the end of April 1968, and although many publications have regretfully not been mentioned, one have attempted to discuss the great majority of those papers which one believe to be of special importance.

The Chemistry of Complexes Containing 2,2′-Bipyridyl, 1, 10-Phenanthroline, or 2,2′,6′,2”-Terpyridyl as Ligands

Publisher Summary This chapter offers information on homoleptic complexes of 2,2'-bipyridine (bpy). The chapter focuses on the class of complexes that contain only bpy ligands bonded to the metal. The unique metal-binding properties of bpy were recognized from the outset. The third renaissance in bpy chemistry can be traced to the commercial availability of the ligand in the 1950s, when large amounts were required for the preparation of Diquat insecticides. The current interest in complexes of bpy is associated with the extremely interesting electrochemical, photophysical, and photoelectrochemical properties that they exhibit. 2,2'-Bipyridine is a strong field ligand that forms relatively stable complexes, with the inherent M–N bond strength enhanced by the chelate effect. Complexes with main group metal ions, and with lanthanides and actinides, can be prepared in water or organic solvents. The bis complexes are known for a range of metals and oxidation states though they tend to be more common for lower formal oxidation states. The bpy ligand is remarkable for the wide range of formal oxidation states with which it is associated. The chapter discusses the general trends in the reactivity of specific complexes under the appropriate elements. Iron, ruthenium, and osmium have played a crucial role in the development of the chemistry of 2,2'-bipyridine.

Homoleptic Complexes of 2,2′-Bipyridine

The Structural and Magnetic Properties of First‐Row Transition‐Metal Dimers Containing Hydroxo, Substituted Hydroxo, and Halogen Bridges

The steric effect in bis(2,2'-bipyridyl) and bis(1,10-phenanthroline) metal compounds

Magnetic susceptibilities and far infra-red spectra of some hydroxo- and alkoxo-bridged copper (II) complexes

The infra-red spectra (667-222 cm−1) of some cobalt (III) bis(ethylenediamine) complexes

Infra-red spectra of some sulphato (and perchlorato) complexes of copper(II)—II

The far infra-red spectra of metal complexes containing substituted pyridines as ligands—II Complexes of cobalt (II) and copper (II) with 2-chloro- and 2-bromo-pyridine

Far infra-red spectra of metal complexes containing substituted pyridines as ligands-I: 2,2′ bipyridylamine complexes of cobalt (II), copper (II), zinc (II) and palladium (II)

W.R. McWhinnie

Papers

Magnetic susceptibilities and far infra-red spectra of some hydroxo- and alkoxo-bridged copper (II) complexes

The infra-red spectra (667-222 cm−1) of some cobalt (III) bis(ethylenediamine) complexes

Infra-red spectra of some sulphato (and perchlorato) complexes of copper(II)—II

The far infra-red spectra of metal complexes containing substituted pyridines as ligands—II Complexes of cobalt (II) and copper (II) with 2-chloro- and 2-bromo-pyridine

Far infra-red spectra of metal complexes containing substituted pyridines as ligands-I: 2,2′ bipyridylamine complexes of cobalt (II), copper (II), zinc (II) and palladium (II)