General Molecule Tools

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Constitutional Isomer Example
What are examples of Constitutional Isomers? The picture below gives an example of Constitutional Isomers: Constitutional or Structure Isomers The molecule on the left is N-Butane, also known as Normal Butane, which is a flammable, colorless, mostly nontoxic gas with a natural gas odor. The molecule... 2020-07-07, 128👍, 0💬

Enantiomers Isomer Example
What are examples of Enantiomers Isomers? The picture below gives an example of Enantiomers Isomers: Stereoisomers > Enantiomers (Mirror Images) The molecule on the left is (R)-Lactic Acid with a chiral C in (R)-configuration, or right-hand configuration, or clockwise configuration. The molec... 2020-07-07, 120👍, 0💬

What Is Isomer
What is Isomer? An Isomer is molecule that has the same the same chemical formula as another molecule, but with a different molecule structure than the other molecule. There are several types of isomers: 1. Constitutional Isomers - Isomers that differ in connectivity are called constitutional isomer... 2020-07-07, 118👍, 0💬

What Is Radical Molecule
What is Radical Molecule? A Radical molecule, also called free radical, is molecule that has one or more radical centers. A Radical center is an atom in a molecule that has an unpaired valence electron, or odd number of valence electrons (including both bounded and unbound electrons). When writing t... 2020-07-07, 117👍, 0💬

Rotamers Example
What are examples of Rotamers? The picture below gives an example of Rotamers: Stereoisomers > Diastereomers > Conformational > Rotamers   ⇒ Molecule Online Tools ⇐ Enantiomers Isomer Example ⇑ Introduction to Molecules ⇑⇑ Molecule FAQ 2020-07-07, 117👍, 0💬

Molecule FYI-1000156
Molecule Summary: ID: FYI-1000156 SMILES: CC.CC Received at FYIcenter.com on: 2020-06-17 2020-07-07, 107👍, 0💬

Molecule FYI-1000155
Molecule Summary: ID: FYI-1000155 SMILES: CC Received at FYIcenter.com on: 2020-06-17 2020-07-07, 107👍, 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, 161👍, 0💬

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, 159👍, 0💬

Substructure Search with Wildcard Atom "*"
How to use Wildcard Atom in a substructure search using "babel" commands? You can use "*" in a SMARTS string as a wildcard atom to represent "ANY" atom in a substructure search using "babel" commands. Here are some examples of substructure matching with a wildcard atom "*" in the molecule pattern: f... 2020-06-08, 148👍, 0💬

"babel -s ..." Command - Substructure Search
How to use "babel -s ..." command to do substructure search? You can do substructure search using the "-s ..." option of the "babel" command with the following syntax: babel input_section output_section -s smarts_string The smarts_string specifies a SMARTS string that represents a molecule pattern. ... 2020-06-08, 145👍, 0💬

What Are SMARTS Expressions
What are SMARTS expressions? SMARTS expressions are divided into 3 types: 1. Atom Expressions - An expression that can be evaluated to an atom pattern using atom operations on atoms and atom expressions. An atom expression must be enclosed in square bracktes, if it is not a single simple atom symbol... 2020-06-08, 143👍, 0💬

What Are Valence Electrons
What Are Valence Electrons of an Atom? Valence Electrons of an Atom are electrons located on the most outer shell of the atom. The number of Valence Electrons of an atom is very important chemical property of the atom. There is no easy way to calculate the number of Valence Electrons of an atom. But... 2020-05-29, 148👍, 0💬

peter-ertl.com/jsme - JSME (JavaScript Molecule Editor)
What IS JSME, Molecule Editor in JavaScript? JSME, Molecule Editor in JavaScript is a free molecule editor created by Peter Ertl and Bruno Bienfait. It can be used as an integrated online Web tool. JSME features are described in its documentation as: "JSME supports drawing and editing of molecules a... 2020-05-29, 146👍, 0💬

What Is Ion
What Is Ion? An ion is a molecule that has a net electrical charge. Since the charge of the electron (considered negative by convention) is equal and opposite to that of the proton (considered positive by convention), the net charge of an ion is non-zero due to its total number of electrons being un... 2020-05-29, 145👍, 0💬

What Is Formal Charge
What is Formal Charge of an atom in a molecule? And what is the total formal charge of a molecule? The formal charge of an atom in a molecule is defined by the formula below: Fc (Formal charge) of atom = Ve - Ue - Be/2 where: Ve = number of valence electrons Ue = number of unbonded electrons Be = nu... 2020-05-29, 145👍, 0💬

"babel -i fs ... -s query_file" - Exact Match Search
How to perform exact match in fastsearch index file using a "babel" command? If you want to perform an exact match search using the fastsearch index file, you can use the following "babel" command syntax: babel -i fs index_file output_section -s query_file In the above command: "-i fs index_file" - ... 2020-05-25, 157👍, 0💬

"babel -i fs ... -s query_file" - Substructure Search
Why am I getting no results with "babel -i fs ... -s query_file" command? It should perform a substructure search in a fastsearch index file. According to the "babel -H fs" help document, you can perform a substructure search in a fastsearch index file with the query molecule stored in a file in any... 2020-05-25, 156👍, 0💬

"babel -i fs ... -s SMILES" - Substructure Search with Index
How to perform a substructure search using the fastsearch index file with the "babel" command? If you want to perform a substructure search using the fastsearch index file, you can use the following "babel" command syntax: babel -i fs index_file output_section -s SMILES In the above command: "-i fs ... 2020-05-25, 155👍, 0💬

Install Open Babel Binary Package on macOS
How to Install Open Babel binary package on macOS computers? The easiest option to install Open Babel on macOS computers is to install the Open Babel pre-compiled binary package as shown in this tutorial. 1. Go to Open Babel download Website at SourceForge.net. 2. Click to open "Files > openb... 2020-05-24, 164👍, 0💬

Understanding "babel" Command Line Syntax
Where to find FAQ (Frequently Asked Questions) on understanding "babel" Command Line Syntax? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on understanding "babel" Command Line Syntax. What Is "babel" Command "babel" Command - Input Data Source ... 2020-05-24, 162👍, 0💬

Open Babel File Location on macOS
Where are Open Babel files located on my macOS computers? If you install Open Babel 2.3.1 with the pre-compiled binary package on a macOS computer, you can find its program file location with the "which" command: fyicenter$ which babel /usr/local/bin/babel fyicenter$ ls -l /usr/local/bin/babel -rwxr... 2020-05-24, 155👍, 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, 154👍, 0💬

Open Babel Tutorials
Where to find FAQ (Frequently Asked Questions) on Open Babel, Chemistry Toolbox? I want to learn more about Open Babel. Here is a large collection of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Open Babel, Chemistry Toolbox: Introduction to Open Babel What I... 2020-05-21, 165👍, 0💬

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General Molecule Tools