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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

924
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
924
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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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.
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...
20.5K
Formation of Complex Ions03:45

Formation of Complex Ions

23.1K
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...
23.1K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

417
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
417
Stereoisomerism02:52

Stereoisomerism

11.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.7K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

318
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
318

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Cytotoxic Organometallic Iridium(III) Complexes.

Irena Kostova1

  • 1Department of Chemistry, Faculty of Pharmacy, Medical University-Sofia, 1000 Sofia, Bulgaria.

Molecules (Basel, Switzerland)
|February 26, 2025
PubMed
Summary
This summary is machine-generated.

Iridium complexes show promise as novel anticancer drugs, offering higher activity and stability than platinum agents. This review explores recent advances in chloridoiridium(III) compounds for cancer treatment.

Keywords:
anticancerchloridoiridium(III)complexescytotoxicreview

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Area of Science:

  • Inorganic Chemistry
  • Medicinal Chemistry
  • Materials Science

Background:

  • Iridium complexes are emerging as potent anticancer agents, surpassing conventional platinum-based drugs in efficacy and stability.
  • Chloridoiridium complexes offer tunable physicochemical and biological properties for targeted cancer therapy.
  • These complexes exhibit potential in photochemotherapy, bioimaging, and biosensing applications.

Purpose of the Study:

  • To review recent advancements in the cytotoxicity studies of chloridoiridium(III) compounds.
  • To categorize and analyze structure-activity relationships of various chloridoiridium complexes.
  • To highlight the potential of iridium complexes as next-generation antitumor agents.

Main Methods:

  • Literature review of recent cytotoxicity studies on chloridoiridium(III) compounds.
  • Categorization of complexes based on structural features (ligand count, donor atoms, nuclearity).
  • Analysis of structure-activity relationships to understand antineoplastic effects.

Main Results:

  • Numerous structural types of chloridoiridium complexes have demonstrated significant antineoplastic activity.
  • Ligand modification allows precise control over biological and photophysical properties.
  • Chloridoiridium complexes exhibit diverse mechanisms of action and target specific intracellular organelles.

Conclusions:

  • Chloridoiridium(III) complexes represent a versatile platform for developing novel anticancer therapeutics.
  • Tailoring ligand structures is crucial for optimizing efficacy, stability, and targeting.
  • Further research into structure-activity relationships will accelerate the clinical translation of these promising agents.