ACD/Name

What's New

Version 4.5 to 5.0

1. Spiro compounds with polycyclic components
2. Preferred names of tautomeric forms
3. Improved stereo configuration analysis
4. Expanded possibilities to name salts
5. Save and load user preferences

New Features in Illustrated Detail

1. Spiro compounds with polycyclic components

Systematic names for polyspiro compounds with polycyclic components can now be generated. Previously, ACD/Index Name refused to name this class of structures. For example, in the following systematic name of Griseofulvin, the name of the parent spiro system is shown in bold:

2. Preferred names of tautomeric forms

ACD/Index Name 5.0 can now recognize possible tautomeric forms of structures and, depending on preferences, can generate names for the drawn form or for the preferred (in the nomenclature sense) form.

This option will help you avoid assignment of different names to different presentations of the same compound.

Preference: Name preferred tautomeric form
Yes	3,4-dihydro-2H-pyrrol-5-amine	3,4-dihydro-2H-pyrrol-5-amine
No	2-pyrrolidinimine

3. Improved stereo configuration analysis

Stereo isomeric forms of allenes and other polyenes can be distinguished by assignment of stereodescriptors. Additional procedures have been incorporated, to recognize previously unsupported types of stereoisomers.

For example, the name of the following chiral allene now includes stereodescriptors (shown in bold):

4. Expanded possibilities to name salts

As soon as CAS index nomenclature had to deal with salts in the neutral form, the previous versions of ACD/Index Name refused to name most salts drawn in charged form. Now, in version 5.0, both charged and neutral forms of salts can be named.

For example, the name of the following structure includes several salt terms shown in bold:

5. Save and load user preferences

ACD/Index Name allows you to change various naming options. Version 5.0 now allows you to choose the most convenient set of preferences, save and load them.