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Related Concept Videos

Coordination Number and Geometry02:57

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 molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

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 the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Crystal Field Theory - Octahedral Complexes02:58

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 the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

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Related Experiment Video

Updated: Jun 9, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

Highly conducting two-dimensional copper(I) 4-hydroxythiophenolate network.

Kam-Hung Low1, V A L Roy, Stephen Sin-Yin Chui

  • 1Institute of Molecular Functional Materials, Department of Chemistry and HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong SAR.

Chemical Communications (Cambridge, England)
|August 27, 2010
PubMed
Summary
This summary is machine-generated.

Researchers created a novel 2-D copper-sulfur (Cu-S) network using self-assembly coordination. This new material exhibits ionic behavior and high electrical conductivity, paving the way for advanced electronic applications.

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Last Updated: Jun 9, 2026

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Published on: April 9, 2018

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Nanotechnology

Background:

  • Developing novel conductive materials is crucial for advancing electronic devices.
  • Coordination polymers offer tunable properties for various applications.
  • Copper-sulfur (Cu-S) based materials are of interest due to their unique electronic characteristics.

Purpose of the Study:

  • To synthesize and characterize a new two-dimensional (2-D) copper-sulfur (Cu-S) coordination network.
  • To investigate the structural and electrical properties of the self-assembled Cu-S network.

Main Methods:

  • Self-assembly coordination between copper(I) ions and 4-hydroxythiophenol.
  • Structure determination using powder X-ray diffraction (PXRD).
  • Measurement of bulk electrical conductivity.

Main Results:

  • Successfully constructed an unprecedented 2-D Cu-S network through self-assembly.
  • Determined the network's structure using PXRD analysis.
  • Observed ionic behavior and a high bulk electrical conductivity of 120 S cm(-1).

Conclusions:

  • The novel 2-D Cu-S network represents a significant advancement in conductive materials.
  • The material's ionic behavior and high conductivity suggest potential applications in energy storage and electronics.
  • Self-assembly coordination is an effective strategy for designing functional inorganic-organic hybrid materials.