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Tautomer energy comparison

using model chemistry: HSEh1PBE/6-31+G**

17 10 12 10 46
formula sketch Energy (kJ mol-1) Name difference
A B calculated experiment A B
C3H4 sketch of allene sketch of propyne 12 -7 allene propyne 18
C4H6 sketch of 1,2-Butadiene sketch of 1,3-Butadiene -42 -51 1,2-Butadiene 1,3-Butadiene 9
C4H6 sketch of 1,2-Butadiene sketch of 2-Butyne -7 -17 1,2-Butadiene 2-Butyne 10
C4H6 sketch of Cyclobutene sketch of 1,3-Butadiene -38 -49 Cyclobutene 1,3-Butadiene 11
C4H6 sketch of 1-Methylcyclopropene sketch of 1,2-Butadiene -69 -82 1-Methylcyclopropene 1,2-Butadiene 13
C4H6 sketch of Methylenecyclopropane sketch of 1-Methylcyclopropene 49 42 Methylenecyclopropane 1-Methylcyclopropene 7
C3H4O2 sketch of 2-Propenoic acid sketch of β–Propiolactone 27 29 2-Propenoic acid β–Propiolactone -2
C4H6S sketch of Thiophene, 2,5-dihydro- sketch of Thiophene, 2,3-dihydro- -1 4 Thiophene, 2,5-dihydro- Thiophene, 2,3-dihydro- -6
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,4-Pentadiene 35 25 1,3-Pentadiene, (E)- 1,4-Pentadiene 10
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,2-Pentadiene 60 64 1,3-Pentadiene, (E)- 1,2-Pentadiene -5
C5H8 sketch of 1,2-Butadiene, 3-methyl- sketch of 1,3-Butadiene, 2-methyl- -43 -52 1,2-Butadiene, 3-methyl- 1,3-Butadiene, 2-methyl- 9
C5H10 sketch of 1-Butene, 2-methyl- sketch of 2-Butene, 2-methyl- -11 -5 1-Butene, 2-methyl- 2-Butene, 2-methyl- -6
C5H10 sketch of Cyclopropane, 1,1-dimethyl- sketch of 1-Butene, 2-methyl- -12 -29 Cyclopropane, 1,1-dimethyl- 1-Butene, 2-methyl- 17