Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Relative enthalpies of isomers - Comparison of 298.15K enthalpies (kJ mol^-1)

Isomers of C₄H₇Cl

index	Species	CAS number	Name	Relative experimental enthalpy (kJ mol-1)	sketch
a	CH2ClCHCHCH3	591979	2-Butene, 1-chloro-	0.0
b	CH2CHCHClCH3	563520	1-Butene, 3-chloro-	3.8
c	CH3CClCHCH3	4894615	2-Butene, 2-chloro-, (E)-	6.3
d	CH3CClCHCH3	4628211	2-Butene, 2-chloro-, (Z)-	11.7
e	CH2CClCH2CH3	2211703	1-Butene, 2-chloro-	20.1
f	CH2CHCH2CH2Cl	927731	1-Butene, 4-chloro-	20.5
g	CHClCHCH2CH3	7611861	(Z)-1-Chloro-1-butene	30.1
h	CHClCHCH2CH3	7611872	(E)-1-Chloro-1-butene	32.8