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Related Concept Videos

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...
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.
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,...
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...
Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.

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Updated: Jun 22, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

A molecular wire incorporating a robust hexanuclear platinum cluster.

Edmund Leary1, Harm Van Zalinge, Simon J Higgins

  • 1Department of Chemistry, University of Liverpool, UK.

Physical Chemistry Chemical Physics : PCCP
|June 30, 2009
PubMed
Summary
This summary is machine-generated.

A novel platinum carbonyl cluster compound was synthesized and found to form stable gold|molecule|gold junctions. This discovery enables the electrical characterization of well-defined molecular components in electronic devices.

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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
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Published on: June 18, 2013

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Last Updated: Jun 22, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Published on: April 27, 2018

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
07:20

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

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08:07

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Metal carbonyl clusters offer unique electronic and structural properties.
  • Developing stable molecular components for electronic devices is a key challenge.

Purpose of the Study:

  • To synthesize a novel, stable platinum carbonyl cluster.
  • To investigate the adsorption and electrical properties of the cluster on gold surfaces.
  • To fabricate and characterize gold|molecule|gold junctions using the cluster.

Main Methods:

  • Synthesis of a platinum carbonyl cluster compound [Pt(6)(CO)(4)(P(t)Bu(2))(4)Cl(2)].
  • Reaction with excess 1,4-butanedithiol to form [Pt(6)(CO)(4)(P(t)Bu(2))(4){S(CH(2))(4)SH}(2)].
  • Adsorption studies on gold surfaces and electrical characterization of fabricated junctions.

Main Results:

  • A highly stable platinum carbonyl cluster with thiol functionalities was successfully synthesized.
  • The synthesized cluster adsorbs unchanged onto gold surfaces.
  • Fabrication of functional gold|molecule|gold junctions was achieved using the cluster.

Conclusions:

  • The synthesized platinum carbonyl cluster is a stable and suitable molecule for constructing molecular electronic junctions.
  • This work demonstrates the potential of well-defined metal carbonyl clusters in molecular electronics.