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Chapter 20

Переходные металлы и координационные комплексы

Chapter 20

Transition Metals and Coordination Complexes

Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are …
Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For …
Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain …
Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to …
Structural Isomerism
Isomerism in Complexes Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be …
Stereoisomerism
Isomerism in Complexes Isomers are different chemical species that have the same chemical formula. Transition metal complexes often exist as geometric …
Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which …
Crystal Field Theory – Octahedral Complexes
Crystal Field Theory To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between …
Crystal Field Theory – Tetrahedral and Square Planar Complexes
Tetrahedral Complexes Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of …
Colors and Magnetism
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For …
Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
This article shows how the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) or the “reaction microscope” technique can be used to distinguish …
Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
The size, size distribution and stability of colloidal nanoparticles are greatly affected by the presence of capping ligands. Despite the key contribution …
Preparation of SNS Cobalt(II) Pincer Model Complexes of Liver Alcohol Dehydrogenase
Chemical model complexes are prepared to represent the active site of an enzyme. In this protocol, a family of tridentate pincer ligand precursors (each …