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Related Concept Videos

Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
Newman Projections02:06

Newman Projections

Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
Fischer Projections02:18

Fischer Projections

Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
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...
Lewis Symbols and the Octet Rule02:36

Lewis Symbols and the Octet Rule

Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.

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Related Experiment Video

Updated: Jul 11, 2026

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
08:49

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

Published on: December 1, 2023

Wiswesser Line Notation: Simplified Techniques for Converting Chemical Structures to WLN.

D A Koniver, W J Wiswesser, E Usdin

    Science (New York, N.Y.)
    |June 30, 1972
    PubMed
    Summary

    New computer-aided techniques generate Wiswesser Line Notations (WLN) without needing manual rule knowledge or programming skills. Chemical structures drawn on a tablet are automatically converted into WLN by a connected computer.

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    Published on: May 27, 2020

    Area of Science:

    • Chemical Informatics
    • Computational Chemistry
    • Cheminformatics

    Background:

    • Wiswesser Line Notation (WLN) is a standardized method for representing chemical structures textually.
    • Manual conversion of chemical structures to WLN can be complex and time-consuming, requiring expertise in specific rules.
    • Existing computational methods may necessitate programming knowledge or complex software operation.

    Purpose of the Study:

    • To develop a user-friendly method for generating Wiswesser Line Notations (WLN).
    • To eliminate the need for users to learn WLN conversion rules or possess computer programming skills.
    • To streamline the process of obtaining WLN for chemical compounds.

    Main Methods:

    • Development of novel computer-aided techniques for WLN generation.
    • Integration of a graphics tablet for inputting chemical structures.
    • Utilizing a programmed computer system to process structural drawings and output WLN.

    Main Results:

    • Successful generation of Wiswesser Line Notations (WLN) directly from drawn chemical structures.
    • Elimination of the requirement for manual rule application or programming expertise.
    • Simplified and efficient WLN creation process.

    Conclusions:

    • The developed technique offers an accessible approach to WLN generation.
    • This method significantly lowers the barrier to entry for chemical structure representation.
    • It provides a practical tool for researchers and chemists needing WLN representations.