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Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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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Di-chlorido-(pyridine-κ<i>N</i>)[2,3,5,6-tetra-kis-(pyridin-2-yl)pyrazine-κ<sup>3</sup> <i>N</i> <sup>2</sup>,<i>N</i> <sup>1</sup>,<i>N</i> <sup>6</sup>]nickel(II).

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Related Experiment Video

Updated: Jun 1, 2026

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

Published on: May 28, 2014

Bis(acridine-κN)dibromidoplatinum(II).

Kwang Ha1

  • 1School of Applied Chemical Engineering, The Research Institute of Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea.

Acta Crystallographica. Section E, Structure Reports Online
|May 19, 2011
PubMed
Summary

This study details the crystal structure of a platinum(II) complex with acridine ligands. The complex exhibits a distorted square-planar geometry and forms distinct chains through π-π interactions in its solid state.

Area of Science:

  • Inorganic Chemistry
  • Crystal Engineering
  • Coordination Chemistry

Background:

  • Platinum(II) complexes are of interest due to their diverse applications.
  • Acridine derivatives offer unique electronic and structural properties.
  • Understanding supramolecular assembly in coordination complexes is crucial for materials science.

Purpose of the Study:

  • To synthesize and characterize a novel platinum(II) complex with acridine ligands.
  • To elucidate the crystal structure and intermolecular interactions of the synthesized complex.
  • To investigate the self-assembly behavior of the complex in the solid state.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • The coordination environment around the platinum(II) ion was analyzed.

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  • Intermolecular interactions, specifically π-π stacking, were quantified.

    • Main Results:

    • The platinum(II) complex, [PtBr2(C13H9N)2], features a distorted square-planar geometry with PtN2Br2 coordination.
    • The platinum atom lies on an inversion center, resulting in a planar PtN2Br2 unit.
    • Complex molecules arrange into chains via intermolecular π-π interactions between acridine ligands, with a centroid-centroid distance of 3.631 Å.

    Conclusions:

    • The crystal structure reveals a well-defined coordination geometry for the platinum(II) complex.
    • Intermolecular π-π interactions play a significant role in the supramolecular organization of the complex in the solid state.
    • The findings contribute to the understanding of structure-property relationships in platinum-acridine systems.