Related Experiment Video
Updated: Jul 2, 2025
10:42
Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
10.7K
Metal Complexes Containing Homoleptic Diorganoselenium(II) Ligands: Synthesis, Characterization and Investigation of
Darius Dumitraș1, Emese Gal2, Cristian Silvestru1
1Supramolecular Organic and Organometallic Chemistry Centre, Department of Chemistry, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Str. Arany Janos 11, RO-400028 Cluj-Napoca, Romania.
Molecules (Basel, Switzerland)
|February 24, 2024
Summary
New organoselenium ligands and their metal complexes were synthesized and characterized. These complexes display interesting solid-state structures and photophysical properties, influenced by ligand design.
Area of Science:
- Coordination Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Organoselenium compounds are versatile ligands in coordination chemistry.
- The electronic and structural properties of ligands influence metal complex behavior.
- Oxazolone moieties can impart unique characteristics to organic molecules and their complexes.
Purpose of the Study:
- To synthesize and structurally characterize novel organoselenium ligands (L1, L2) containing oxazolone groups.
- To explore the coordination chemistry of these ligands with silver (Ag), gold (Au), and zinc (Zn) metal centers.
- To investigate the solid-state structures, electronic properties, and supramolecular interactions of the resulting metal complexes.
Main Methods:
- Synthesis of diarylselenium ligands with oxazolone substituents.
- Preparation and characterization of various metal complexes using techniques like X-ray diffraction.
- Spectroscopic analysis (UV-Vis) to determine photophysical properties.
- Electrolyte conductivity measurements in solution.
Main Results:
- Successful synthesis of two diarylselenium ligands (L1, L2) and their corresponding Ag, Au, and Zn complexes.
- Structural elucidation revealed diverse coordination modes and supramolecular assemblies, including a tetranuclear silver complex with bridging ligands.
- Complexes exhibited similar photophysical properties, with UV-Vis spectra showing a bathochromic shift attributed to ligand structure.
- Solution studies indicated ionic behavior for some silver complexes, contrasting with their solid-state structures.
Conclusions:
- The position of the oxazolone ring on the phenyl substituent influences the structural and electronic properties of the organoselenium ligands and their metal complexes.
- The synthesized metal complexes exhibit rich supramolecular chemistry and tunable photophysical characteristics.
- These findings contribute to the understanding of organoselenium ligand design and their applications in coordination chemistry and materials science.
Related Concept Videos
02:52Stereoisomerism
11.9K
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...
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...
11.9K
02:51Metal-Ligand Bonds
20.8K
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...
20.8K
02:34Structural Isomerism
19.2K
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...
19.2K
03:02Colors and Magnetism
11.7K
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...
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...
11.7K
01:23Properties of Organometallic Compounds
996
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.
996
01:19Complexation Equilibria: The Chelate Effect
515
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...
515