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Tautomer energy comparison

using model chemistry: MP3=FULL/6-31+G**

17 10 12 10 46
formula sketch Energy (kJ mol-1) Name difference
A B calculated experiment A B
C4H6 sketch of 1,2-Butadiene sketch of 1,3-Butadiene -53 -51 1,2-Butadiene 1,3-Butadiene -1
C4H6 sketch of 1,2-Butadiene sketch of 1-Butyne 9 3 1,2-Butadiene 1-Butyne 6
C4H6 sketch of Cyclobutene sketch of 1,3-Butadiene -51 -49 Cyclobutene 1,3-Butadiene -2
C4H6 sketch of 1-Methylcyclopropene sketch of 1,2-Butadiene -75 -82 1-Methylcyclopropene 1,2-Butadiene 7
C4H6 sketch of Methylenecyclopropane sketch of 1-Methylcyclopropene 48 42 Methylenecyclopropane 1-Methylcyclopropene 6
C3H6O sketch of Oxetane sketch of Propanal -107 -110 Oxetane Propanal 3
C4H8 sketch of cyclobutane sketch of 1-Butene -27 -33 cyclobutane 1-Butene 6
C4H6S sketch of Thiophene, 2,5-dihydro- sketch of Thiophene, 2,3-dihydro- -1 4 Thiophene, 2,5-dihydro- Thiophene, 2,3-dihydro- -5
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,4-Pentadiene 25 25 1,3-Pentadiene, (E)- 1,4-Pentadiene 0
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,2-Pentadiene 65 64 1,3-Pentadiene, (E)- 1,2-Pentadiene 1
C5H8 sketch of 1,2-Butadiene, 3-methyl- sketch of 1,3-Butadiene, 2-methyl- -52 -52 1,2-Butadiene, 3-methyl- 1,3-Butadiene, 2-methyl- -0
C5H10 sketch of 1-Butene, 2-methyl- sketch of 2-Butene, 2-methyl- -6 -5 1-Butene, 2-methyl- 2-Butene, 2-methyl- -0
C5H10 sketch of Cyclopropane, 1,1-dimethyl- sketch of 1-Butene, 2-methyl- -21 -29 Cyclopropane, 1,1-dimethyl- 1-Butene, 2-methyl- 8