BUTENES, ALL ISOMERS

Molecular formula: C₄H₈

STRAIGHT CHAIN-BUTENES [mixture of 1- and 2-butene]

Synonyms: Butene; n-Butene; n-Butylene

1-BUTENE

CAS number: 106-98-9

Synonyms: a-Butene; But-1-ene; a-Butylene; 1-Butylene; Ethylethylene

Chemical formula: CH₃CH₂CH=CH₂

Structure:

2-BUTENE [mixture of trans- and cis-]

CAS number: 107-01-7

Synonyms: b-Butene; b-Butylene; Dimethylethylene; Pseudobutylene

Chemical formula: CH₃CH=CHCH₃

cis-2-BUTENE

CAS number: 590-18-1

Synonyms: 2-Butene; cis-Butene; cis-Butene-2; b-cis-Butylene; cis-1,2-Dimethylethylene

Structure:

trans-2-BUTENE

CAS number: 624-64-6

Synonyms: 2-Butene, (E)-; trans-Butene; 2-trans-Butene; b-trans-Butylene; trans-1,2-Dimethylethylene

Structure:

ISOBUTENE

CAS number: 115-11-7

Synonyms: ¡-Butylene; 1,1-Dimethylethene; 1,1-Dimethylethylene; asymmetric Dimethylethylene; Isobutylene; Isopropylidenemethylene; 2-Methylpropene (MP); 2-Methyl-1-propene; 2-Methylpropene; 2-Methylpropylene; 1-Propene, 2-methyl-

Chemical formula: CH₂=C(CH₃)₂

Structure:

Mixture of all four butene isomers

CAS number: 25167-67-3

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