Cyclopentene TCI C1617

Chemical Identity

CAS No.: 142-29-0
PubChem: CID 8882·SID 87566612
Formula: C5H8
Molecular weight: 68.12 g/mol
Purity: >95.0%(GC)
Storage: 0-10°C
Reference databases: ChEBI·ChemSpider·ECHA·Wikipedia

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: cyclopentene
SMILES: C1CC=CC1
InChIKey: LPIQUOYDBNQMRZ-UHFFFAOYSA-N
MDL: MDL00001394

Rp 477.750,00

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TCI C1617 Cyclopentene (CAS 142-29-0) is a five-membered cyclic hydrocarbon with one carbon-carbon double bond inside its ring. It is a cycloalkene and one of the simplest non-heterocyclic building blocks used in organic synthesis. In the laboratory, cyclopentene is a starting material for building five-carbon ring frameworks. It is also a model substrate for studying addition reactions on alkenes and a monomer in polymerisation research. Because its structure is compact, it is widely used in teaching and research to show how cyclic alkenes typically behave.

Chemists choose cyclopentene because its reactive double bond sits inside a slightly strained ring. This makes it readily undergo electrophilic addition, epoxidation, dihydroxylation, hydroboration and ring-opening metathesis. The molecule is symmetrical, so its reaction products are relatively easy to predict and to analyse by NMR spectroscopy and gas chromatography. As a TCI product, the material offers consistent quality from lot to lot, so researchers can repeat experiments and compare the results. It is supplied as a liquid, which makes it easy to measure and transfer in routine synthetic work.

In Indonesian laboratories, cyclopentene is mainly used in university organic chemistry departments, in research groups working on synthetic methods, and in polymer science laboratories. Lecturers and students use it as a clear example of how cyclic alkenes react in practical classes and final-year research projects. Research teams use it as a starting material for five-membered carbocyclic targets, and as a reference substrate when they test new catalysts or reaction conditions before moving on to more complex molecules.

Related TCI products

Five-membered ring construction: cyclopentene gives a ready-made five-carbon ring framework, so chemists can add functional groups directly instead of forming the ring from scratch.
Alkene addition studies: the reactive double bond in a symmetrical ring makes it a good model substrate for studying electrophilic addition, hydroboration and the selectivity of these reactions.
Epoxidation and dihydroxylation: the slightly strained cyclic alkene reacts readily with oxidising reagents, which makes it useful for preparing cyclic epoxides and diols and for comparing oxidation methods.
Ring-opening metathesis polymerisation research: the ring strain and internal double bond let cyclopentene act as a monomer in studies of metathesis catalysts and polymerisation behaviour.
Teaching and analytical demonstrations: its simple, symmetrical structure gives products that are easy to predict and to analyse by NMR and gas chromatography, which suits instructional laboratories.

Brand	TCI (product code C1617)
CAS number	142-29-0
Molecular formula	—
Purity	—
Category	Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes	please check the available options on the product listing
Physical form	liquid
Storage	keep tightly closed in a cool, well-ventilated area away from ignition sources

Store cyclopentene in its original, tightly sealed container in a cool, dry and well-ventilated place, away from heat, sparks, open flames and other ignition sources. Keep it away from strong oxidising agents. As an organic liquid, it should be handled in a fume hood while wearing safety glasses, chemical-resistant gloves and a laboratory coat. Use only the amount needed for each experiment, close the container straight after use, and label any secondary containers clearly. Always read the supplier's Safety Data Sheet before use, and dispose of waste according to your institution's chemical waste procedures and local regulations.

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