# Salt and cocrystal:
\n4-dimethylanimopyridine maleic acid
(Last updated February 2026)
Figure . The molecular diagram of 4-dimethylaminopyridine maleic acid and 4-dimethylaminopyridinium maleate.
| REFCODE | UCLSMB |
|---|---|
| Formula | C7 H10 N2 - C4 H4 O4 |
| Common Name | 4-dimethylaminopyridine - butan-1,4-dioic acid |
| IUPAC Systematic Name | 4-dimethylaminopyridine - butan-1,4-dioic acid |
| Other Names | |
| CSD Refcodes | |
| Search Identifier | A |
| Scientist | Sharmarke Mohamed |
| Date | 2011 |
| Publication | Mohamed S, Tocher DA, Price SL 2011. Int J Pharm 218 DOI: Open paper (10.1016/j.ijpharm.2011.03.063) |
| Energy model | 1 |
| Study_ID | 20 |
| Programs | Rigid CrystalPredictor, DMACRYS (2.0.0) |
| Location on S Drive | \\CHEMISTRY_CPOSS\\SaltOrCocrystal-IntJPharm2011\\dimethylaminopyridinemaleicacid\\4dimethylaminopyridine-maleicacid |
| Potential Description | DMA(MP2 6-31(d,p)) + FIT + Theresa Beyer OH parameters |
| Intramolecular Description | MP2/6-31G(d,p) |
| REFCODE | GUKVUE |
| Formula | C7 H11 N2 - C4 H3 O4 |
| Common Name | 4-dimethylaminopyridinium - butan-1-carboxylate-4-carboxylic acid |
| IUPAC Systematic Name | 4-dimethylaminopyridinium - butan-1-carboxylate-4-carboxylic acid |
| Other Names | |
| CSD Refcodes | GUKVUE |
| Search Identifier | A |
| Scientist | Sharmarke Mohamed |
| Date | 2011 |
| Publication | Mohamed S, Tocher DA, Price SL 2011. Int J Pharm 218 DOI: Open paper (10.1016/j.ijpharm.2011.03.063) |
| Energy model | 1 |
| Study_ID | 20 |
| Programs | Rigid CrystalPredictor, DMACRYS (2.0.0) |
| Location on S Drive | \\CHEMISTRY_CPOSS\\SaltOrCocrystal-IntJPharm2011\\dimethylaminopyridinemaleicacid\\4dimethylaminopyridinium-maleate |
| Potential Description | DMA(MP2 6-31(d,p)) + FIT + Theresa Beyer OH parameters |
| Intramolecular Description | MP2/6-31G(d,p) |
Figure . Crystal energy landscape of 4-dimethylaminopyridine maleic acid and 4-dimethylaminopyridinium maleate from previous work.
Table . Crystallographic information for CSD entries for 4-dimethylaminopyridine maleic acid and 4-dimethylaminopyridinium maleate. Different polymorphs are coloured differently.
| REFCODE | space group | Z’ | a / Å | b / Å | c / Å | α / ° | β / ° | γ / ° | density / g cm-3 | Form |
|---|---|---|---|---|---|---|---|---|---|---|
| GUKVUE | P21/c | 1.0 | 13.127 | 7.599 | 12.576 | 90.0 | 114.23700 | 90.0 | 1.3833 | None |
Table . Experimental information for CSD entries for 4-dimethylaminopyridine maleic acid and 4-dimethylaminopyridinium maleate.
| REFCODE | space group | R factor | T / K | Year | Comments |
|---|---|---|---|---|---|
| GUKVUE | P21/c | 6.08 | at 150 K | 2009 | 10.1021/cg9001994 |
Make this table include whether polymorphs are solution-grown, sublimation grown, templated or otherwise. Add references.