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Capitolo 20
Proprietà dei metalli di transizione
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups…
Composti di coordinazione e nomenclatura
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For…
Legami metallo-leganti
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain…
Numero di coordinazione e geometria
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers…
Isomeria strutturale
Isomerism in Complexes Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can…
Stereoisomeria
Isomers are different chemical species that have the same chemical formula. Transition metal complexes often exist as geometric isomers, in which…
Teoria del legame di Valence
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from…
Teoria del campo cristallino - Complessi ottaedrici
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons…
Teoria del campo cristallino - Complessi planari tetraedrici e quadrati
Tetrahedral Complexes Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes…
Colori e magnetismo
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals.…
Preparazione dei complessi di modelli di pinze SNS di Disidrogeno del Fegato
Chemical model complexes are prepared to represent the active site of an enzyme. In this protocol, a family of tridentate pincer ligand precursors…
Formazione immagine di esplosione Coulombiana come uno strumento per distinguere tra stereoisomeri
This article shows how the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) or the "reaction microscope" technique can be used to distinguish…
Ligando-mediata di nucleazione e crescita di nanoparticelle metalliche Palladium
The size, size distribution and stability of colloidal nanoparticles are greatly affected by the presence of capping ligands. Despite the key…

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