I Lab Services 

4.12 IUPAC Name 

This module generates the systematic name for general organic compounds, according to 

guidelines specified by the International Union of Pure and Applied Chemistry (IUPAC). 

Note that the IUPAC Name Free service (with a set of restrictions on naming) is also available for 

Public I Lab. 

When you choose this property from the menu, the dialog box appears where you can specify the 

options described in the following sections. 

4.12.1 Common Tab 

4.12.1.1  Use Retained Replacements 

This allows you to specify whether or not to replace pure systematic parts of the name by its 

commonly agreed upon name.  For example, for the two structures shown, highly different names 

can be generated: 

CH

3

CH

3

HO

O

O

OH

Yes 

toluene methylmalonic 

acid 

No 

methylbenzene methylpropanedioic 

acid 

4.12.1.2  Advanced Enclosing Marks 

This allows you to specify which enclosing marks should be used: just parentheses or 

parentheses, brackets, braces, etc. in nesting order.  The latter is preferred for clarity, but some 

text editors cannot handle these. 

For example: 

N

CH

3

O

S

Yes 

2 {[(methylsulfanyl)methyl]oxy}pyridine

No 

2 (((methylsulfanyl)methyl)oxy)pyridine 

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