Fig. 4

The optimized geometry, numbering system, vector of dipole moment of the newly synthesized compounds (2a (A), 7a (B) and 8 (C)) using B3LYP/6-311 +  + G (d, p) level of calculation
The optimized geometry, numbering system, vector of dipole moment of the newly synthesized compounds (2a (A), 7a (B) and 8 (C)) using B3LYP/6-311 +  + G (d, p) level of calculation