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Tautomer energy comparison

using model chemistry: LSDA/6-31G**

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 -22 -51 1,2-Butadiene 1,3-Butadiene 30
C4H6 sketch of 1,2-Butadiene sketch of 1-Butyne 33 3 1,2-Butadiene 1-Butyne 30
C4H6 sketch of 1,2-Butadiene sketch of 2-Butyne -3 -17 1,2-Butadiene 2-Butyne 14
C4H6 sketch of Cyclobutene sketch of 1,3-Butadiene -1 -49 Cyclobutene 1,3-Butadiene 48
C4H6 sketch of 1-Methylcyclopropene sketch of 1,2-Butadiene -58 -82 1-Methylcyclopropene 1,2-Butadiene 24
C4H6 sketch of Methylenecyclopropane sketch of 1-Methylcyclopropene 47 42 Methylenecyclopropane 1-Methylcyclopropene 6
C4H6S sketch of Thiophene, 2,5-dihydro- sketch of Thiophene, 2,3-dihydro- -4 4 Thiophene, 2,5-dihydro- Thiophene, 2,3-dihydro- -9
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,4-Pentadiene 44 25 1,3-Pentadiene, (E)- 1,4-Pentadiene 18
C5H8 sketch of 1,3-Pentadiene, (E)- sketch of 1,2-Pentadiene 55 64 1,3-Pentadiene, (E)- 1,2-Pentadiene -9
C5H10 sketch of Cyclopropane, 1,1-dimethyl- sketch of 1-Butene, 2-methyl- -0 -29 Cyclopropane, 1,1-dimethyl- 1-Butene, 2-methyl- 29
C5H10 sketch of 1-Butene, 2-methyl- sketch of 2-Butene, 2-methyl- -17 -5 1-Butene, 2-methyl- 2-Butene, 2-methyl- -12