1,2-Dimethylcyclopropane

Names

IUPAC name

Identifiers

CAS Number

2511-95-7^N

ChemSpider

92890^Y

Jmol interactive 3D

InChI=1S/C5H10/c1-4-3-5(4)2/h4-5H,3H2,1-2H3^Y
Key: VKJLDXGFBJBTRQ-UHFFFAOYSA-N^Y
InChI=1/C5H10/c1-4-3-5(4)2/h4-5H,3H2,1-2H3
Key: VKJLDXGFBJBTRQ-UHFFFAOYAK

SMILES

CC1CC1C

Properties

Chemical formula

C₅H₁₀

Molar mass

70.14 g·mol⁻¹

Density

cis: 0.6889 g/cm³
trans: 0.6648 g/cm³

Melting point

cis: -140 °C
trans: -149.6 °C

Boiling point

cis: 37 °C
trans: 28.2 °C

Refractive index (n_D)

cis: 1.3829 (20 °C)
trans: 1.3713 (20 °C)

Related compounds

cyclopropane, cyclopentane

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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Infobox references

1,2-dimethylcyclopropane is a cycloalkane consisting of a cyclopropane ring and two methyl groups. It has three geometric isomers: two (E-) and one (Z-), depending on the position of its two methyl groups. As with other cyclopropanes, ring tension results in a relatively unstable compound. One thing to note about this molecule is that there are two isomers of "trans"-1,2-dimethylcyclopropane, which are enantiomers.

1,2-dimethylcyclopropane is 1 of 10 structural isomers (cycloalkanes and aliphatic alkenes) which share the general formula of C₅H₁₀, the others being cyclopentane, methylcyclobutane, 1,1-dimethylcyclopropane, ethylcyclopropane, 1-pentene, 2-pentene, 2-methyl-1-butene, 3-methyl-1-butene, and 2-methyl-2-butene.

1,2-Dimethylcyclopropane

See also