Related Experiment Video
Updated: Mar 24, 2026
04:51
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
Published on: June 23, 2023
4.4K
"Third-Generation"-Type Functional Tris(2-pyridyl)borate Ligands and Their Transition-Metal Complexes
So Yi Jeong1, Roger A Lalancette1, Huina Lin1
1Department of Chemistry, Rutgers University-Newark , 73 Warren Street, Newark, New Jersey 07102, United States.
Inorganic Chemistry
|March 19, 2016
Summary
We developed new functionalized Phenyltris(2-pyridyl)borates (Tpyb) ligands and their iron and ruthenium complexes. These advanced Tpyb ligands enable further chemical modifications for novel materials.
Area of Science:
- Coordination Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Phenyltris(2-pyridyl)borates (Tpyb) are versatile tripodal ligands.
- Tpyb ligands are valuable for creating transition-metal complexes with tunable properties.
- Existing Tpyb ligands offer limited scope for peripheral functionalization.
Purpose of the Study:
- To synthesize and characterize novel "third-generation" Tpyb ligands with diverse functional groups.
- To investigate the metal-ion complexation and reactivity of these new Tpyb ligands.
- To explore the potential of functionalized Tpyb complexes in developing advanced materials.
Main Methods:
- Synthesis and characterization of iodo- and trimethylsilyl-substituted Tpyb ligands.
- Complexation studies with iron(II) and ruthenium(II) ions.
- Electrochemical and absorption spectroscopy analyses.
- Sonogashira-Hagihara coupling and electrophilic borylation reactions.
Main Results:
- Successfully synthesized and characterized new Tpyb ligands with iodo and trimethylsilyl groups.
- Demonstrated high-yield Sonogashira-Hagihara coupling on iodo-Tpyb metal complexes.
- Observed complex borylation products in ruthenium(II) complexes, indicating reactivity at multiple aromatic sites.
Conclusions:
- The new functionalized Tpyb ligands offer enhanced synthetic versatility.
- Peripheral functionalization of Tpyb metal complexes is achievable through various coupling reactions.
- These findings open avenues for creating novel metallosupramolecular polymers and functional materials.
More Related Videos
Related Concept Videos
02:42Valence Bond Theory
11.6K
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...
11.6K
02:51Metal-Ligand Bonds
25.4K
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...
25.4K
02:57Coordination Number and Geometry
19.6K
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.
19.6K
02:58Crystal Field Theory - Octahedral Complexes
31.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.6K
03:02Colors and Magnetism
14.5K
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...
14.5K
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
951
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...
951