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פרק 20
תכונות של מתכות עבר
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups…
תרכבות קוארדינטיביות ונומנקלטורה
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For…
קשרי מתכת-ליגנדה
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain…
מספר קוארדינציה וגאומטריה
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers…
איזומריזם מבני
Isomerism in Complexes Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can…
סטראו-איזומריזם
Isomers are different chemical species that have the same chemical formula. Transition metal complexes often exist as geometric isomers, in which…
תאוריית קשר הערכיות
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from…
תאוריית שדות הקריסטל- קומפלקסים אוקטהדרליים
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons…
תאוריית שדות הקריסטל- קומפלקסים טטרהדרליים ומרובעים מישוריים
Tetrahedral Complexes Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes…
צבעים ומגנטיזציה
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals.…
הכנת SNS קובלט (II) מכלולי מודל מודלים של הכבד אלכוהול דהידרוגנאז
Chemical model complexes are prepared to represent the active site of an enzyme. In this protocol, a family of tridentate pincer ligand precursors…
הפיצוץ הקולומבית הדמיה ככלי להבחנה בין Stereoisomers
This article shows how the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) or the "reaction microscope" technique can be used to distinguish…
התגרענות בתיווך ליגנד והצמיחה של חלקיקי מתכת פלדיום
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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