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Read Stereoinformation from Input
How stereoinformation is being read from input data by Open Babel? Most molecule data files store stereoinformation in 3 ways: 0D, 2D, and 3D. 0D: Stereoinformation in 0 dimension is defined by parity (or chirality) at atom level. 2D: Stereoinformation in 2 dimension is defined by bond style as wedg...
2022-11-16, 734🔥, 0💬

What Is Stereochemistry
What Is Stereochemistry? Stereochemistry is the study of stereoisomers, which are molecules having same atoms and same connectivities, but with different spatial arrangements. Here are some stereoisomers listed in the picture below: Example of Stereoisomers You can do stereochemistry with Open Babel...
2022-11-09, 937🔥, 0💬

"obminimize" - Optimize Geometry/Energy of Molecule
What Is "obminimize" command? How to use it to optimize the geometry and minimize the energy for a given molecule? "obminimize" command is a command line tool provided in the Open Babel package that allows you to optimize the geometry and minimize the energy for a given molecule. Here is the user ma...
2022-08-27, 6310🔥, 2💬

💬 2022-08-20 FYIcenter.com: @Nathjanan, Yes. Your command is correct.

💬 2022-08-17 Nathjanan: Hello, How can I optimize small molecues? obminimize -ff MMFF94 -n 1000 *.mol2 Is this command correct? Thanks

Hash Bond with Solid Line
Why Hash Bond with a Solid Line used by Open Babel? Sometimes, when a hash bond is located on a ring structure, Open Babel adds a solid line to the hash bond. Here is an example SDF/Mol file, Hash-with-Solid-Line.sdf, that has 4 stereo centers on a ring structure. Hash-with-Solid-Line FYICenter.com ...
2022-07-26, 748🔥, 0💬

Stereochemistry with Open Babel
Where to find FAQ (Frequently Asked Questions) on doing Stereochemistry with Open Babel? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on doing Stereochemistry with Open Babel. What Is Stereochemistry Read Stereoinformation from Input Stereo Per...
2022-05-31, 1023🔥, 0💬

Structure Display Command on Open Babel GUI
How to change the display command on Open Babel GUI? By default, Open Babel GUI uses Firefox to display molecule structure. If you don't have Firefox installed, you will get an error: Obgui Error: Execution of command "firefox ..." failed. System cannot find the file. To fix the problem, you can cha...
2022-05-31, 1016🔥, 0💬

Custom Wedge/Hash with SVG output
How to create a molecule structure with custom wedge/hash bonds? I don't like the default presentation of wedge/hash bonds. As shown in the previous tutorial, Open Babel has its own algorithm to detect stereo centers and decide which bond to presented as a wedge or hash bond. The resulting wedge/has...
2021-12-02, 1561🔥, 0💬

R/S (Right/Left) Hand Stereo Centers
Right/Left Hand Stereo Centers? In chemstry study, a stereo center a labeled as R (Rectus, Right in Latin) Hand or S (Sinister, Left in Latin) according to the following rules. 1. Assign precedence ranks to its 4 neighboring branches, as #1, #2, #3, and #4. Neighboring branch with #1 has the highest...
2021-12-02, 1475🔥, 0💬

"babel -i sdf -o svg" - Custom Atom Positions
How to create a molecule structure with custom atom positions? You can create a molecule structure with custom atom positions using "obabel -i sdf -o svg" command as shown below. 1. Create a SDF file for your molecule structure. Take the L-Alanin-2D.sdf file used in other tutorials as an example. 2....
2021-12-01, 1395🔥, 0💬

JSME Molecule Editor at FYIcenter.com
What is JSME Molecule Editor at FYIcenter.com? FYIcenter.com maintains a version of JSME Molecule Editor. You can use it to create a new molecule, or edit an existing molecule. JSME, Molecule Editor in JavaScript is a free molecule editor created by Peter Ertl and Bruno Bienfait. It can be used as a...
2021-08-13, 882🔥, 0💬

"babel" vs. "obabel" Commands
What are the differences between "babel" and "obabel" commands? "babel" and "obabel" commands are two commands of the same Open Babel chemical data conversion program with slightly different command line syntaxes. You can see the syntax differences between "babel" and "obabel" commands by running th...
2021-07-19, 1979🔥, 0💬

"obabel ... -o svg" Command - Generate SVG from SMILES
How to generate a molecule SVG picture from a SMILES string? The easiest way to generate a molecule SVG picture from a SMILES string is to use the the "babel ... -o svg" command. For example, the following command generate a SVG picture of the tyrosine molecule from a SMILES string: fyicenter$ obabe...
2021-07-19, 1137🔥, 0💬

"babel ... -o svg" - Generating SVG Pictures
Where to find FAQ (Frequently Asked Questions) on using Open Babel to generate SVG Pictures from molecule input data? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on using Open Babel to generate SVG Pictures from molecule input data. "babel -o ...
2021-07-19, 794🔥, 0💬

"babel" Command - Input Data Source and Format
How to specify Input Data Source and Format for a "babel" command? "babel" command arguments and options are organized into 3 sections as shown in the following syntax to convert chemical data from input to output with specified options. babel input_section output_section option_section You use inpu...
2021-07-19, 768🔥, 0💬

"babel -o svg" Command - SVG Generation Options
What options can I use when generating SVG pictures from molecule input data? You can see a list of options supported by Open Babel when generating SVG pictures from molecule input data by running the "babel -H svg" command: fyicenter$ babel -V Open Babel 2.4.1 fyicenter$ babel -H svg svg SVG 2D dep...
2021-07-19, 731🔥, 0💬

"babel -... --..." Command - Generic Conversion Options
What are generic conversion options that I can use on "babel" commands for all input and output formats? "babel" commands supports a number of generic conversion options that applies all input and output formats as listed below: --addtotitle Append text to the current molecule title --addformula App...
2021-07-19, 722🔥, 0💬

"babel" Command - From STDIN To STDOUT
Can I use "babel" to convert chemical data from "stdin" to "stdout" without input and output files? Yes, you can use "babel" to convert chemical data from "stdin" to "stdout" without input and output files. Just use "-i ..." and "-o" flags to specify input data format and output data format. For exa...
2021-07-19, 696🔥, 0💬

"babel" Command - Output Data Destination and Format
How to specify Output Data Destination and Format for a "babel" command? "babel" command arguments and options are organized into 3 sections as shown in the following syntax to convert chemical data from input to output with specified options. babel input_section output_section option_section You us...
2021-07-19, 674🔥, 0💬

"babel" Command - Use "-o ..." as Output Delimiter
How to use "-o ..." flag as a delimiter to separate output file from input files in a "babel" command? The "-o ..." flag is optional, since "babel" command can implicitly determine the output data format from the file extension of output file name. However, it is important to use the "-o ..." flag a...
2021-07-19, 660🔥, 0💬

Run Open Babel GUI on Windows
How to run OpenBabelGUI on Windows computers? Open Babel GUI is the graphical user interface for Open Babel. You can use Open Babel GUI to open a molecule file in any supported format and convert it to any other format. Here is how to Open Babel GUI on Windows. 1. Search for "Open Babel GUI" in "Sta...
2021-03-07, 3251🔥, 0💬

Install Open Babel Binary Package on Windows
How to Install Open Babel binary package on Windows computers? The easiest option to install Open Babel on Windows computers is to install the Open Babel pre-compiled binary package as shown in this tutorial.: 1. Go to GitHub Website for Open Babel 3.0.0 . 2. Click to download "OpenBabel-3.0.0.exe" ...
2021-02-17, 2864🔥, 0💬

Running Open Babel on Windows
Where to find FAQ (Frequently Asked Questions) on running Open Babel on Windows? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on running Open Babel on Windows. Install Open Babel Binary Package on Windows Run Open Babel GUI on Windows Structure...
2021-02-17, 1034🔥, 0💬

"babel ... -o svg -xi" - Show Atom Indices in SVG
How to show atom indices in a molecule SVG picture? I want to see in what order each atom is listed in the SMILES string. The SMILES string list each atom a molecule is a specific sequence. You can use the "-xi" option when generating the SVG file to show the index of each atom corresponding to the ...
2021-02-04, 901🔥, 0💬

Substructure Search with SMARTS Expressions
How to use SMARTS expressions in a substructure search using "babel" commands? You can use SMARTS expressions in the "-s ..." option in "babel" commands to filter molecules that match given SMARTS expressions. Here are some examples: # C, C and O connected with single bonds fyicenter$ obabel "-:c1cc...
2021-01-09, 962🔥, 0💬

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