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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...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
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.
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...
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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Nuclear Transmutation03:20

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Related Experiment Video

Updated: May 13, 2026

Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

A salen-type trinuclear Zn2Gd complex.

Yong-Mei Tian1, Hong-Feng Li, Bing-Lu Han

  • 1Key Laboratory of Functional Inorganic Material Chemistry (HLJU), Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|March 8, 2013
PubMed
Summary
This summary is machine-generated.

This study details a novel trinuclear gadolinium-zinc complex. Researchers elucidated the coordination chemistry and geometry of the gadolinium(III) and zinc(II) ions within this intricate molecular structure.

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Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
08:43

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Published on: October 27, 2018

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Last Updated: May 13, 2026

Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
08:43

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Published on: October 27, 2018

Area of Science:

  • Coordination Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • The synthesis and characterization of multinuclear metal complexes are crucial for developing new materials with tailored properties.
  • Understanding the coordination environment around metal ions provides insights into their electronic and magnetic behavior.

Purpose of the Study:

  • To synthesize and characterize a novel trinuclear gadolinium-zinc complex.
  • To determine the coordination geometry and bonding environment of the gadolinium(III) and zinc(II) ions within the complex.

Main Methods:

  • Single-crystal X-ray diffraction was employed to elucidate the molecular structure of the complex.
  • Spectroscopic techniques were utilized for further characterization.

Main Results:

  • The complex features a trinuclear core with a central gadolinium(III) ion and two peripheral zinc(II) ions.
  • The zinc(II) ions adopt a five-coordinate square-pyramidal geometry within the N2O2 cavities of the diphenolate ligands.
  • The gadolinium(III) ion is nine-coordinated, with oxygen atoms from multiple ligands and acetate groups completing its coordination sphere.

Conclusions:

  • The study successfully characterized a novel GdZn2 complex, revealing intricate coordination environments for both metal ions.
  • The findings contribute to the understanding of lanthanide-transition metal interactions and coordination chemistry.