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Tautomer energy comparison

using model chemistry: M06-2X/3-21G*

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 -6 -7 allene propyne 1
C4H6 sketch of 1,2-Butadiene sketch of 1,3-Butadiene -39 -51 1,2-Butadiene 1,3-Butadiene 13
C4H6 sketch of 1,2-Butadiene sketch of 2-Butyne -22 -17 1,2-Butadiene 2-Butyne -5
C4H6 sketch of Cyclobutene sketch of 1,3-Butadiene -50 -49 Cyclobutene 1,3-Butadiene -1
C4H6 sketch of 1-Methylcyclopropene sketch of 1,2-Butadiene -105 -82 1-Methylcyclopropene 1,2-Butadiene -23
C4H6 sketch of Methylenecyclopropane sketch of 1-Methylcyclopropene 62 42 Methylenecyclopropane 1-Methylcyclopropene 20
C3H6O sketch of Oxetane sketch of Propanal -98 -110 Oxetane Propanal 12
C4H8 sketch of cyclobutane sketch of 1-Butene -21 -33 cyclobutane 1-Butene 12
C3H4O2 sketch of 2-Propenoic acid sketch of β–Propiolactone 28 29 2-Propenoic acid β–Propiolactone -1
C4H6S sketch of Thiophene, 2,5-dihydro- sketch of Thiophene, 2,3-dihydro- -3 4 Thiophene, 2,5-dihydro- Thiophene, 2,3-dihydro- -7
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,4-Pentadiene 26 25 1,3-Pentadiene, (E)- 1,4-Pentadiene 1
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,2-Pentadiene 46 64 1,3-Pentadiene, (E)- 1,2-Pentadiene -18
C5H8 sketch of 1,2-Butadiene, 3-methyl- sketch of 1,3-Butadiene, 2-methyl- -41 -52 1,2-Butadiene, 3-methyl- 1,3-Butadiene, 2-methyl- 10
C5H10 sketch of 1-Butene, 2-methyl- sketch of 2-Butene, 2-methyl- -6 -5 1-Butene, 2-methyl- 2-Butene, 2-methyl- -1
C5H10 sketch of Cyclopropane, 1,1-dimethyl- sketch of 1-Butene, 2-methyl- -35 -29 Cyclopropane, 1,1-dimethyl- 1-Butene, 2-methyl- -6
C6H8 sketch of 1,4-Cyclohexadiene sketch of 1,3-Cyclohexadiene -2 -3 1,4-Cyclohexadiene 1,3-Cyclohexadiene 0