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Related Concept Videos

Ladder Diagrams: Complexation Equilibria01:07

Ladder Diagrams: Complexation Equilibria

Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
Valence Bond Theory02:42

Valence Bond Theory

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...
Phase Diagrams of Ternary Systems01:28

Phase Diagrams of Ternary Systems

Consider a ternary system, which is composed of three components: water (W), ethanoic acid (E), and trichloromethane (T). Here, Ethanoic acid (E) is fully miscible with both water (W) and trichloromethane (T), meaning it can mix entirely with either of them. However, water and trichloromethane have partial miscibility, meaning they can only mix to a certain extent, beyond which two separate phases will form.The phase diagram of a ternary system is represented as an equilateral triangle, where...
Molecular Models02:00

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
pV-Diagrams01:18

pV-Diagrams

The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.

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Related Experiment Video

Updated: Jun 28, 2026

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
09:33

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis

Published on: October 15, 2019

Diagrams for complete representation of binary mononuclear complex systems.

I Nagypál1, M T Beck

  • 1Institute of Inorganic and Analytical Chemistry, L. Kossuth University, H-4010 Debrecen, Hungary.

Talanta
|June 1, 1982
PubMed
Summary
This summary is machine-generated.

This study simplifies chemical equilibrium calculations for mononuclear complexes. A novel diagrammatic approach eliminates complex iterative procedures, directly presenting all essential chemical and solubility data.

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Area of Science:

  • Chemical Thermodynamics
  • Solution Chemistry
  • Computational Chemistry

Background:

  • Calculating solution equilibria typically involves complex iterative methods to solve mass balance and mass action equations.
  • Existing methods for determining chemical information, including solubility, can be computationally intensive.

Purpose of the Study:

  • To develop a simplified method for calculating solution equilibria in systems with mononuclear complex formation.
  • To represent complex chemical information, including solubility, in a single, easily interpretable diagram.
  • To avoid the need for iterative procedures in equilibrium calculations.

Main Methods:

  • Formulating the system of equations based on mass balance and the law of mass action.
  • Developing a novel diagrammatic representation for mononuclear complex formation.
  • Calculating necessary data for diagram construction directly, bypassing iterative solutions.

Main Results:

  • A single diagram can encapsulate all critical chemical information for mononuclear complex formation.
  • The proposed method allows for direct calculation of data, eliminating the need for iterative procedures.
  • Solubility equilibria are integrated into the comprehensive diagrammatic representation.

Conclusions:

  • The diagrammatic approach offers a significant simplification for calculating and visualizing solution equilibria.
  • This method provides a direct and efficient way to obtain chemical and solubility data for mononuclear complexes.
  • The findings present a valuable tool for researchers in solution chemistry and chemical thermodynamics.