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"babel --append ..." Command - Calculate Molecule Properties
How to use "babel --append ..." command to calculate Molecule Properties? The "--append ..." option of the "babel" command can be used to copy existing molecule properties from the input data source, and append them to the "title" field of output molecules. But the "--append ..." option can also be ...
2020-12-26, 2583🔥, 0💬

contentWindow.ketcher - Access "ketcher" Object
How to access the "ketcher" object when Ketcher is loaded in an HTML "iframe" element? As mentioned in the last tutorial, if Ketcher is loaded in an HTML "iframe" element, you can access the "ketcher" object with the follow JavaScript code: lst = document.getElementsByTagName( "iframe");frm = lst[0]...
2025-09-24, 2580🔥, 2💬

💬 2025-09-24 FYIcenter.com: @Robert, Can you share your entire HTML code including the JavaScript here?

💬 2025-09-19 Robert Grossman: I downloaded the Ketcher standalone Jsvascript code from your site and copied your suggested code here onto a Web page in the ke...

Substructure Search with Wildcard Bond "~"
How to use Wildcard Bond in a substructure search using "babel" commands? You can use "~" in a SMARTS string as a wildcard bond to represent "ANY" bond in a substructure search using "babel" commands. Here are some examples of substructure matching with a wildcard bond "~" in the molecule pattern: f...
2020-06-08, 2570🔥, 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, 2568🔥, 0💬

Loading JSME JavaScript in "body"
Can I load JSME JavaScript code in HTML "body" element instead of "head"? Yes, you can load JSME JavaScript code in HTML "body" element instead of "head" 1. Create a new HTML document, load-JSME-in-body.html, with JSME loaded in the "body" element: &lt;html&gt; &lt;head&gt; &lt;t...
2020-05-18, 2560🔥, 0💬

Install JSME on Apache Web Server
How to install JSME on an Apache Web server? If you want to install JSME on a Web server for others to try it remotely, you can follow this tutorial to install it an an Apache Web server. 1. Follow the previous tutorial to download and install JSME on your local computer in the "./JSME_nnnn-nn-nn" s...
2020-05-18, 2531🔥, 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, 2470🔥, 0💬

Introduction to JSME
Where to find FAQ (Frequently Asked Questions) on basic understanding of JSME, Molecule Editor in JavaScript? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on basic understanding of JSME, Molecule Editor in JavaScript. What IS JSME - Molecule Ed...
2020-05-18, 2422🔥, 0💬

"DNF/YUM search" - Open Babel Binary Packages
Is there any Open Babel binary packages ready to be installed with DNF/YUM on CentOS systems? The answer is yes and no, depending on which release of CentOS you are running. If you are running CentOS 8.0, Open Babel binary packages are available: fyicenter$ more /etc/system-release CentOS Linux rele...
2020-10-20, 2403🔥, 0💬

ketcher.getMolfile() - Export Molecule in Molfile Format
How to export the molecule structure in Molfile format from the Ketcher with the ketcher.getMolfile() method? To export the molecule structure in Molfile format from the Ketcher, you can use the getMolfile() method provided by the Ketcher API as shown in below: 1. Load the Ketcher editor in an "ifra...
2024-03-17, 2401🔥, 0💬

"obfit" - Superimpose Two Molecules
What Is "obfit" command? How to use it to Superimpose Two Molecules? "obfit" command is a command line tool provided in the Open Babel package that allows you to Superimpose Two Molecules. Here is the user manual of the "obfit" command. NAME obfit -- superimpose two molecules based on a pattern SYNO...
2020-11-11, 2401🔥, 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, 2383🔥, 0💬

Open Babel History and Releases
When Open Babel was first developed? And how many Open Babel releases are there? The original Babel was written by Pat Walters and Matt Stahl in 2001, based on the "convert" program by Ajay Shah. The original Babel is a remarkable chemistry file conversion tool. Pat Walters and Matt Stahl rewrote Ba...
2020-09-15, 2349🔥, 0💬

"obconformer" - Generate Best Conformer
What Is "obconformer" command? How to use it to generate the best conformer from a base molecule? "obconformer" command is a command line tool provided in the Open Babel package that allows you to generate the best conformer from a base molecule. Here is the user manual of the "obconformer" command....
2020-11-22, 2333🔥, 0💬

"babel ... -o svg -xP300" Bug - width="px" height="px"
Why "babel ... -o svg -xP300" command is not able scale a molecule SVG image? The "babel ... -o svg -xP300" command has a code bug that results incorrect attributes, width="px" height="px", in the top level "svg" element. in both Open 2.3 and 2.4 releases. However, "obabel ... -o svg -xP300" command...
2020-07-22, 2332🔥, 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, 2322🔥, 0💬

Substructure Search with Open Babel
Where to find FAQ (Frequently Asked Questions) on Substructure Search with Open Babel? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Substructure Search with Open Babel. "babel -s ..." Command - Substructure Search Substructure Search with Wi...
2020-06-08, 2285🔥, 0💬

Install Ketcher on Apache Web Server
How to install Ketcher on an Apache Web server? If you want to install Ketcher on a Web server for others to try it remotely, you can follow this tutorial to install it an Apache Web server. 1. Follow the previous tutorial to download and install Ketcher on your local computer in the "./standalone" ...
2024-10-14, 2271🔥, 0💬

"babel ... -o svg -xX" - Hide Implicit H in SVG
How to hide those H symbols (Hydrogen symbols) implicitly added to non-carbon terminal atoms in SVG with the "babel" command? If you want to hide those Hydrogen symbols implicitly added to non-carbon terminal atoms in SVG format, you can use the "-o svg -xX" option with the "babel" command. Here is ...
2020-07-22, 2242🔥, 0💬

Open Babel Command Files on macOS
What are Open Babel commands and files installed by the macOS binary package? If you install Open Babel 2.3.1 with the pre-compiled binary package on a macOS computer, you will get a number of Open Babel commands. All Open Babel command files are located in the /usr/local/bin directory: fyicenter$ l...
2020-05-24, 2209🔥, 0💬

What Is "babel" Command
What Is "babel" Command? How to get command line help for Open Babel? "babel" Command is the command to invoke Open Babel different functionalities by specifying different command options. You can use "babel -H" command to get help information on Open Babel command: fyicenter$ babel -H Open Babel co...
2020-09-15, 2168🔥, 0💬

"obrotate" - Rotate Dihedral Angles with SMARTS
What Is "obrotate" command? How to use it to batch-rotate dihedral angles matching SMARTS patterns? "obrotate" command is a command line tool provided in the Open Babel package that allows you to batch-rotate dihedral angles matching SMARTS patterns. Here is the user manual of the "obrotamer" comman...
2020-10-26, 2164🔥, 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, 2152🔥, 0💬

Ketcher User Interface Menu Icons
What are Ketcher user interface menu icons? Ketcher user interface menu icons are organized into 4 toolbars: 1. Action toolbar - Displayed horizontally at the top of the window, the main toolbar contains the following buttons to perform different actions: Clear canvas - Removes everything in the edi...
2023-11-06, 2125🔥, 0💬

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