Table 1 B3LYP/6-31G* - SCIPCM (including ZPE corrections, gas phase values in parentheses) and PM3 - SCRF computed energies (in kJmol-1) of tautomers A, (E)-B, (Z)-B, and C for compounds 7 and 8

Table 1 B3LYP/6-31G* - SCIPCM (including ZPE corrections, gas phase values in parentheses) computed energies (in kJmol-1) of tautomers A, (E)-B, (Z)-B, and C for compounds 1 and 2.^a

compound	1	2
A	0.0 (0.0)	0.0 (0.0)
*(E)-B*	-1.2 (-2.4)	34.5 (25.2)
*(Z)-B*	-6.9 (-7.8)	—^b(41.1)
C	-5.3 (-2.4)	59.1 (47.4)

^aTotal B3LYP/6-31G* - SCIPCM energies including ZPE corrections (in au) are: -631.037062 (1A) and -650.438330 (2A) .^bnot converged^.