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

Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

47.5K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
47.5K
Formation of Complex Ions03:45

Formation of Complex Ions

18.8K
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...
18.8K
Ionic Crystal Structures02:42

Ionic Crystal Structures

18.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
18.0K
Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

63.2K
Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
63.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.4K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.4K
Metallic Solids02:37

Metallic Solids

16.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
16.4K

You might also read

Related Articles

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

Sort by
Same author

Impact of Bipyridine and Phenanthroline Incorporation into the Macropa Scaffold on Ba(II)/Ra(II) Chelation.

Inorganic chemistry·2026
Same author

Evaluating the Incorporation of Picolinamide Pendants into the Macropa Scaffold for Pb(II)- and Bi(III)-Based Radiopharmaceuticals.

Inorganic chemistry·2026
Same author

Isomerism and Relaxation Properties of Lanthanide(III) Complexes of a Ditopic Ligand with Two DO3A Units Bridged by a Methylene-bis(phosphinate) Spacer.

Inorganic chemistry·2026
Same author

Manganese-Templated Nontrivial Structures for MRI and Therapy.

Journal of the American Chemical Society·2026
Same author

Revisiting NHC-Metal Bonding: π-Donation in Mid- to High-Valent Iron Nitrido Complexes Stabilizes the Fe(VI) Oxidation State.

Journal of the American Chemical Society·2026
Same author

A Structurally Authenticated Closed-Shell Iron(IV) Oxo Ferryl Complex: Synthesis, Properties, and Reactivity.

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Apr 28, 2026

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

1.9K

Secrets of solid state and aqueous solution structures of [Ni(tmdta)](2-).

Roland Meier1, Carlos Platas-Iglesias, Frank W Heinemann

  • 1Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstrasse 1, 91058 Erlangen, Germany.

Inorganic Chemistry
|June 12, 2014
PubMed
Summary

This study reveals a conformational equilibrium between half-chair (hc) and twist-boat (tb) forms of trimethylenediaminetetraacetate (tmdta) in aqueous nickel(II) complexes. This equilibrium influences spectral properties and complex stability, providing insights into ligand design.

More Related Videos

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.0K
Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
08:44

Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate

Published on: February 23, 2016

8.6K

Related Experiment Videos

Last Updated: Apr 28, 2026

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

1.9K
Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.0K
Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
08:44

Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate

Published on: February 23, 2016

8.6K

Area of Science:

  • Coordination Chemistry
  • Computational Chemistry
  • Spectroscopy

Background:

  • Nickel(II) complexes with chelating ligands are crucial in various chemical applications.
  • Understanding ligand conformation is key to predicting complex behavior and stability.
  • Trimethylenediaminetetraacetate (tmdta) is a versatile ligand with potential for diverse coordination geometries.

Purpose of the Study:

  • To determine the molecular structures of nickel(II)-tmdta complexes in the solid state.
  • To investigate the conformational equilibrium (twist-boat vs. half-chair) of the tmdta ligand in aqueous solution.
  • To correlate structural conformations with spectroscopic properties and complex stability.

Main Methods:

  • X-ray crystallography for solid-state structure determination.
  • Density Functional Theory (DFT) computations for spectral simulations.
  • Raman, IR, and UV-Vis spectroscopy for solution studies.
  • Temperature-dependent 13C NMR for kinetic analysis.

Main Results:

  • Solid-state structures revealed half-chair (hc) and twist-boat (tb) conformations of the tmdta ligand.
  • A tb ⇌ hc equilibrium was identified in aqueous solution with a ratio of approximately 2:3.
  • Spectroscopic data (Raman, IR, 13C NMR) strongly supported the proposed equilibrium.
  • Electronic spectra showed distinct intensity differences for the 10Dq band between hc and tb conformers.
  • Complex formation and protonation constants were determined, showing differences compared to ethylenediaminetetraacetate (edta) complexes.

Conclusions:

  • The tmdta ligand exhibits conformational flexibility in nickel(II) complexes, existing in an equilibrium between hc and tb forms in solution.
  • This conformational equilibrium significantly impacts the spectroscopic signatures and stability of the complexes.
  • Extending the diamine ring in tmdta compared to edta affects both complex and protolytic stability.