Related Experiment Video
Updated: Jun 15, 2025
10:51
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
12.1K
Half-Sandwich Ruthenium and Osmium Complexes with Hydrazinocurcuminoid-like Ligands
Noemi Pagliaricci1, Riccardo Pettinari1, Fabio Marchetti2
1School of Pharmacy, University of Camerino, via Madonna delle Carceri, 62032 Camerino, MC, Italy.
Organometallics
|June 13, 2025
Summary
Ruthenium and osmium complexes with novel hydrazinocurcuminoid ligands show promising anticancer activity against breast and ovarian cancer cells. These water-soluble, stable compounds exhibit good selectivity, sparing normal cells.
Area of Science:
- Organometallic Chemistry
- Medicinal Chemistry
- Computational Chemistry
Background:
- Ruthenium and osmium complexes are explored for their therapeutic potential.
- Hydrazinocurcuminoid ligands offer unique coordination properties.
- Developing novel anticancer agents with improved selectivity is crucial.
Purpose of the Study:
- To synthesize and characterize novel half-sandwich ruthenium and osmium complexes with hydrazinocurcuminoid ligands.
- To evaluate the coordination behavior and electronic properties of the ligands and complexes using computational methods.
- To assess the in vitro cytotoxicity and selectivity of the synthesized complexes against various cancer cell lines.
Main Methods:
- Synthesis and characterization of complexes using NMR spectroscopy and mass spectrometry.
- X-ray diffraction analysis for solid-state structural confirmation.
- Density Functional Theory (DFT) studies for ligand and complex evaluation.
- Cytotoxicity assays against MCF-7 (breast) and A2780 (ovarian) cancer cells, including cisplatin-resistant lines, and HEK293T normal cells.
Main Results:
- Successful synthesis and full characterization of ruthenium and osmium half-sandwich complexes with two distinct hydrazinocurcuminoid ligands.
- Structural elucidation confirmed a pseudo-octahedral "three-legged piano-stool" geometry.
- DFT studies provided insights into ligand coordinating abilities and complex electronic structures.
- The complexes demonstrated high water solubility and stability under physiological conditions.
- Significant cytotoxicity was observed against human breast and ovarian cancer cells, including resistant strains.
- Good selectivity was achieved, with reduced toxicity towards normal HEK293T cells.
Conclusions:
- Novel ruthenium and osmium half-sandwich complexes with hydrazinocurcuminoid ligands have been successfully synthesized and characterized.
- These complexes exhibit favorable physicochemical properties, including water solubility and stability.
- The compounds show potent and selective anticancer activity, representing a promising new class of metallodrugs.
More Related Videos
Related Concept Videos
02:51Metal-Ligand Bonds
20.6K
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...
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...
20.6K
02:34Structural Isomerism
19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K
02:42Valence Bond Theory
8.5K
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...
8.5K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.0K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.0K
02:54Coordination Compounds and Nomenclature
21.2K
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...
21.2K
01:20Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
1.9K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
1.9K