Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Valence Bond Theory02:42

Valence 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
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

1.8K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.8K
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

906
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
906
Structural Isomerism02:34

Structural 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...
19.1K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

2.7K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
2.7K
Metal-Ligand Bonds02:51

Metal-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...
20.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Long-Lived Photochromism in a Crystalline Hybrid Naphthalenediimide-Polyoxovanadate System.

Inorganic chemistry·2026
Same author

Hydrochlorides, hydrates, hydronitrate, and an unanticipated hydrolysis product of famotidine.

Acta crystallographica. Section C, Structural chemistry·2026
Same author

Exploration of a benzothiophene scaffold for use as adjuvants with β-lactam antibiotics against methicillin-resistant <i>Staphylococcus aureus</i>.

RSC medicinal chemistry·2026
Same author

The <i>Nitro-Chloro</i> Substitution on Two Quinolinone-Chalcones: From Molecular Modeling to Antioxidant Potential.

ACS omega·2026
Same author

Ultrafast Relaxation of MLCT Excited States in Manganese Tricarbonyl Complexes: Insights from Polarization-Resolved Femtosecond X-ray Absorption Spectroscopy at the Mn and Br K-Edges.

Journal of the American Chemical Society·2026
Same author

Sulfur insertion into group 12 metal dithiolate complexes: metal-dependent equilibria.

Dalton transactions (Cambridge, England : 2003)·2026

Related Experiment Video

Updated: Jun 4, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

9.6K

Tunability in Heterobimetallic Complexes Featuring an Acyclic "Tiara" Polyether Motif.

Joseph P Karnes1, Natalie M Lind1, Allen G Oliver2

  • 1Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States.

Inorganic Chemistry
|December 23, 2024
PubMed
Summary
This summary is machine-generated.

Acyclic "tiara" polyethers effectively bind metal cations, forming redox-active heterobimetallic complexes. These tiara-based complexes offer similar tunability to cyclic "crown" ethers but are easier to synthesize.

More Related Videos

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.3K
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
07:14

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

Published on: August 23, 2018

9.0K

Related Experiment Videos

Last Updated: Jun 4, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

9.6K
Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.3K
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
07:14

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

Published on: August 23, 2018

9.0K

Area of Science:

  • Coordination Chemistry
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Cyclic "crown" and acyclic "tiara" polyethers are known for metal cation binding.
  • Acyclic polyethers for heterobimetallic complexes are less explored than cyclic counterparts.
  • Redox-active metal complexes are crucial in various chemical applications.

Purpose of the Study:

  • To synthesize and characterize novel redox-active heterobimetallic complexes using acyclic "tiara" polyethers.
  • To investigate the structural and electronic properties of these tiara-based complexes.
  • To compare the utility of acyclic "tiara" motifs with cyclic "crown" motifs in multimetallic complex construction.

Main Methods:

  • Synthesis of eight heterobimetallic complexes pairing nickel with various secondary cations (K+, Na+, Li+, Sr2+, Ca2+, Zn2+, La3+, Lu3+).
  • X-ray diffraction analysis for structural determination of precursor and selected heterobimetallic adducts.
  • Spectroscopic and electrochemical studies (including titration data in acetonitrile) to assess stability and tunability.

Main Results:

  • Successful synthesis and characterization of eight redox-active heterobimetallic complexes.
  • Structural analysis confirmed cation binding in the tiara moiety, revealing greater conformational flexibility than analogous crown ethers.
  • Spectroscopic and electrochemical data indicated stability and cation-driven tunability comparable to crown-based systems.

Conclusions:

  • Acyclic "tiara" polyethers are effective ligands for constructing tunable heterobimetallic complexes.
  • Tiara motifs offer comparable performance to crown ethers with advantages in synthetic accessibility.
  • The findings suggest broad applicability of tiara motifs in designing ligands for multimetallic chemistry.