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Tautomer energy comparison

using model chemistry: QCISD/6-31G(2df,p)

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 0
C4H6 sketch of 1,2-Butadiene sketch of 1,3-Butadiene -33 -51 1,2-Butadiene 1,3-Butadiene 19
C4H6 sketch of 1,2-Butadiene sketch of 1-Butyne 2 3 1,2-Butadiene 1-Butyne -1
C4H6 sketch of Cyclobutene sketch of 1,3-Butadiene -32 -49 Cyclobutene 1,3-Butadiene 18
C4H6 sketch of 1-Methylcyclopropene sketch of 1,2-Butadiene -76 -82 1-Methylcyclopropene 1,2-Butadiene 7
C4H6 sketch of Methylenecyclopropane sketch of 1-Methylcyclopropene 45 42 Methylenecyclopropane 1-Methylcyclopropene 4
C3H6O sketch of Oxetane sketch of Propanal -112 -110 Oxetane Propanal -1
C4H8 sketch of cyclobutane sketch of 1-Butene -20 -33 cyclobutane 1-Butene 13