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Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

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Metal-Ligand Bonds02:51

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 compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

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Related Experiment Video

Updated: May 31, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

catena-Poly[bis-(μ(3)-2-methyl-benzoato)disilver(I)].

Muhammad Danish, M Nawaz Tahir, Sabiha Ghafoor

    Acta Crystallographica. Section E, Structure Reports Online
    |July 15, 2011
    PubMed
    Summary

    The crystal structure of a silver compound reveals polymeric chains with silver cations in a distorted trigonal coordination, featuring specific silver-oxygen bond lengths and separations.

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    A Method to Fabricate Disconnected Silver Nanostructures in 3D
    05:45

    A Method to Fabricate Disconnected Silver Nanostructures in 3D

    Published on: November 27, 2012

    Area of Science:

    • Inorganic Chemistry
    • Crystal Engineering
    • Coordination Chemistry

    Background:

    • Silver coordination polymers are of interest due to their diverse structural motifs and potential applications.
    • Understanding the relationship between ligand structure and resulting network topology is crucial for designing novel materials.

    Purpose of the Study:

    • To elucidate the crystal structure of the silver 2-methyl-benzoate compound.
    • To analyze the coordination environment of silver cations and the arrangement of organic ligands.
    • To investigate the intermolecular interactions within the polymeric structure.

    Main Methods:

    • Single-crystal X-ray diffraction was employed to determine the crystal structure.
    • The crystal structure was analyzed to identify coordination geometries and bond distances.
    • Intermolecular silver-silver separations and ligand orientations were quantified.

    Main Results:

    • The crystal structure of [Ag(2)(C(8)H(7)O(2))(2)](n) was determined, showcasing polymeric chains along the a axis.
    • Two silver cations exhibit distorted trigonal coordination with Ag-O bond lengths ranging from 2.169(2) to 2.433(2) Å.
    • Silver-silver separations fall within 2.8674(4)-3.6256(5) Å, and 2-methyl-benzoate groups are oriented at a 60.7(1)° dihedral angle.

    Conclusions:

    • The study provides detailed structural information on a novel silver coordination polymer.
    • The distorted trigonal coordination and specific Ag-O bond lengths highlight the coordination preferences of silver(I) in this system.
    • The observed structural features contribute to the understanding of crystal packing and intermolecular forces in silver carboxylates.