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Related Concept Videos

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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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.
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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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Coordination Number and Geometry02:57

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.
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Related Experiment Video

Updated: Jan 17, 2026

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Homometallic Polynuclear Rhodium Complexes in Anticancer Drug Development.

Irena Kostova1

  • 1Department of Chemistry, Faculty of Pharmacy, Medical University of Sofia, 2 Dunav St., Sofia, 1000, Bulgaria.

Mini Reviews in Medicinal Chemistry
|September 15, 2025
PubMed
Summary
This summary is machine-generated.

Polynuclear rhodium compounds show promise as anticancer agents. These metal complexes offer enhanced efficacy and selectivity, expanding therapeutic potential beyond single-metal drugs.

Keywords:
Rhodiumanticancercomplexesdrug development.homometallicpolynuclear

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Area of Science:

  • Medicinal Chemistry
  • Inorganic Chemistry
  • Drug Development

Background:

  • Cisplatin's success spurred research into metal-based anticancer agents.
  • Group IXB metals (Rh, Ir, Pd) and their complexes are investigated for antitumor properties.
  • Polymetallic complexes offer synergistic effects and improved biodistribution.

Purpose of the Study:

  • To review recent advances in polynuclear homometallic rhodium compounds for cancer treatment.
  • To highlight the potential of rhodium-based complexes as antineoplastic agents.
  • To address the understudied nature of polynuclear Rh-based compounds.

Main Methods:

  • Literature review of polynuclear rhodium complexes in cancer research.
  • Analysis of studies focusing on structural and functional diversity.
  • Evaluation of cytotoxic effects, intracellular distribution, and selectivity.

Main Results:

  • Polynuclear rhodium compounds demonstrate enhanced cytotoxic effects.
  • These complexes exhibit improved intracellular distribution and selectivity.
  • Rhodium-based compounds show promise for multifunctional drug development.

Conclusions:

  • Polynuclear rhodium complexes are promising candidates for novel anticancer therapies.
  • Further research into these compounds could lead to advanced drug candidates.
  • Their unique properties offer advantages over mononuclear metal complexes.