Sep 13 2018 Feedback.
Contents
 
Help Videos
Reference Guide
Getting Started
Protein Structure
Molecular Graphics
Slides & ActiveICM
Cheminformatics
 Read
 Save
 Chemical Spreadsheets
 Editor
 Chemical Search
 2D Interaction
 Fragments
 Find Bioisostere
 Molcart
 Calculate Properties
 Standardize Table
 Annotate
 Align/Color by 2D Scaffold
 Formal Charges
 Enumerate Formal Charge States
 Convert
 Predict
 Generate Tautomers
 Generate Stereoisomers
 Prodrug
 Ligand Energetics
 Cluster Set
 PCA Analysis
 Visualize Chemical Space
 Compare Two Sets
 Merge Two Sets
 Select Duplicates
 MPO
 Combinatorial Chemistry
 SAR Analysis
Tables and Plots
Local Databases
Tutorials
 
Index
PrevICM User's Guide
7.19 Generate Stereoisomers
Next

Available in the following product(s): ICM-Chemist-Pro | ICM-VLS

Theory

Isomers are molecules which have the same chemical formula and sometimes the same kind of bonds but in which the atoms are arranged differently.

Structural isomers have different atom-to-atom connections e.g. propanol (C3H8O or C3H7OH) has two isomers Propan-1-ol and Propan-2-ol.

Diastereomers are not mirror images and have different internal dimensions (e.g. dihedral angles and distances between non-bonded atoms). They can be configurational diastereomers (which can be interconverted only by breaking bonds or by changing the configurations of stereocenters) or conformational diastereomers (which can be interconverted by rotation about bonds - including chair flips or by lone pair inversion .

Enantiomers have identical internal dimensions, and are nonsuperimposable mirror images. Enantiomers can be configurational and conformational.

Enatiomers are distinguished based on the Latin terms for left (sinister) and right (rectus). In some cases where the handedness is unknown a chiral center can be labeled "RS"or unknown.

To enumerate and display in a separate table the stereoisomers of selected compounds.

  • Select the compound(s) in the molecular table. Selected compounds are highlighted in blue.
  • Right click in the table and select the option Chemistry/ Enumerate stereoisomers. Or select the Chemistry menu and choose Generate Stereoisomers. If you generate stereoisomers via the Chemistry menu you will get a dialog box whereby you can run the process in batch mode. There is also an option to color stereoisomers from the same compound with the same color.
  • Group Rows With Color option will color stereoisomers from the same compound with the same color to visually higlight them.
  • Skip if Number of Centers Greater than option can be used to filter out compounds which have a defined number of stereo centers. If you do not wish to filter just use the default No limit option.
  • The compounds will be displayed in a separate molecular table called STEREOISOMERS.

NOTE: Stereoisomer generation will keep pre-defined stereo centers and only enumerate racemic ones.

From the Chemistry Menu:

From a chemical spreadsheet:

NOTE: Only centers with unknown chirality will be enumerated.


Prev
Generate Tautomers
Home
Up
Next
Prodrug

Copyright© 1989-2018, Molsoft,LLC - All Rights Reserved.
This document contains proprietary and confidential information of Molsoft, LLC.
The content of this document may not be disclosed to third parties, copied or duplicated in any form,
in whole or in part, without the prior written permission from Molsoft, LLC.