Molecule record

proline

C₅H₉NO₂

115.13 g/mol

Molecular properties

Formula: C₅H₉NO₂
Molar mass: 115.13 g·mol⁻¹
Exact mass: 115.0633 Da
: 2
: 2
: 3
: 49.30 Å²
: -2.5 (PubChem computed XLogP3-AA descriptor)
CAS: 147-85-3
PubChem CID: 145742

Interactions

Polarity: Often polar; exact polarity depends on size, substitution, and ionization state.
Acid-base behavior: Review ionizable groups and pKa data where available; ChemForge does not infer definitive acid-base state from identity alone.
Intermolecular forces: Assess dispersion, dipole interactions, hydrogen bonding, and ionic character from the functional groups shown.

Functional groups

Alcohol

Aromatic ring

Carboxylic acid

Phenol

Physical properties

Property	Value	Conditions	Source
Logp	-2.5	PubChem computed XLogP3-AA descriptor	PubChem(link only)

Common names and synonyms

(-)-(S)-Proline
(-)-2-Pyrrolidinecarboxylic acid
(-)-Proline
(2S)-pyrrolidine-2-carboxylic acid
(S)-2-Carboxypyrrolidine
(S)-2-Pyrrolidinecarboxylic acid
(S)-Proline
(S)-Pyrrolidine-2-carboxylic acid

Show all 23 synonyms

147-85-3
2-Pyrrolidinecarboxylic acid, (S)-
2-pyrrolidinecarboxylic acid
AI3-26710
CB 1707
FEMA No. 3319
L-(-)-Proline
L-Pro
L-Prolin
L-alpha-Pyrrolidinecarboxylic acid
L-proline
PRO (IUPAC abbreviation)
Prolinum
Prolinum [Latin]
prolina

Structure identifiers

Canonical SMILES: C1C[C@H](NC1)C(=O)O
Isomeric SMILES: C1C[C@H](NC1)C(=O)O
InChI: InChI=1S/C5H9NO2/c7-5(8)4-2-1-3-6-4/h4,6H,1-3H2,(H,7,8)/t4-/m0/s1
InChIKey: ONIBWKKTOPOVIA-BYPYZUCNSA-N
PubChem CID: 145742

Spectroscopy

Tabs appear only for spectra stored with clear provenance.

Open library

IR spectrum

ChemArche Original Educational Content(redistributable)

Simulated FTIR trace

Predicted FTIR / %T

4 cm^-1 resolution / deterministic instrument profile

Hover for cursor

ResolutionNoise

Peak assignments

3350 cm⁻¹broad O-H (simulated)

3000 cm⁻¹broad acid O-H (simulated)

1710 cm⁻¹C=O acid (simulated)

3030 cm⁻¹aromatic C-H (simulated)

1600 cm⁻¹aromatic C=C (simulated)

2960 cm⁻¹sp3 C-H (simulated)

Simulated NMR

On-demand educational prediction for proline; not experimental data.

Simulated EI mass spectrum

On-demand educational fragmentation for proline; not experimental data.

Sources

Molecule identity

Retrieved 8/7/2026. Reuse status is summarized by the badge; open the source for full details.

PubChem(link only)

simulated IR

ChemForge original educational simulation.

ChemArche Original Educational Content(redistributable)

Open source record