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Coordination Number and Geometry

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For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

Coordination Compounds and Nomenclature

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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
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Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times...

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Detection of Viruses from Bioaerosols Using Anion Exchange Resin

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Anion coordination chemistry using O-H groups.

Stephanie A Boer¹, Emer M Foyle, Chriso M Thomas

¹Research School of Chemistry, The Australian National University, Canberra, Australia. stephanie.boer@anu.edu.au nicholas.white@anu.edu.au.

Chemical Society Reviews

|March 13, 2019

Summary

This summary is machine-generated.

This review highlights advances in using O-H groups for anion coordination chemistry. Key applications include synthetic anion receptors, transport, self-assembly, and catalysis.

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Area of Science:

Coordination Chemistry
Supramolecular Chemistry

Background:

O-H groups are fundamental functional groups in chemistry.
Their role in anion binding and recognition is increasingly important.
Anion coordination chemistry is crucial for various chemical processes.

Purpose of the Study:

To review significant advances in the application of O-H groups in anion coordination chemistry.
To highlight the versatility of O-H groups in designing functional molecular systems.
To cover recent developments in anion transport, self-assembly, and catalysis mediated by O-H groups.

Main Methods:

Literature review of recent research articles and reviews.
Analysis of studies focusing on O-H functionalized molecules for anion binding.
Synthesis and characterization of anion receptors, transport systems, and catalytic assemblies.

Main Results:

O-H groups are effective hydrogen bond donors for anion recognition.
Synthetic anion receptors utilizing O-H groups show high affinity and selectivity.
O-H mediated systems demonstrate potential in anion transport, self-assembly, and catalysis.

Conclusions:

O-H groups are versatile building blocks in anion coordination chemistry.
Continued research in this area promises novel applications in sensing, separation, and catalysis.
The development of O-H based anion receptors and systems is a rapidly advancing field.