Table 2 Bader charge.

Bader charge change in the three structures.

StructureNa2C6H2O4Na3C6H2O4Na4C6H2O4
AtomValue charge (e)Bader charge (e)Bader charge (e)Bader charge (e)
O167.16587.21987.2390
O267.16477.19587.2449
C144.07994.16064.1575
C243.27583.36973.5519
C343.25223.31723.4727