Complex

$d_{\text{C-O}},\text{s}$ (Å)

${d^{\prime }}_{\text{C-N}}\text{s}$ (Å)

${d^{\prime }}_{{\text{C}}_{\text{ring}}\text{-C}}\text{s}$ (Å)

${{\theta }^{\prime }}_{\text{COO}}\text{s}$ (deg.)

${\theta }_{{\text{NH}}_2}$ (deg.)

Na₂ATA

1.276

1.379

1.502

122.32

118.30

Na₃ATA

1.268

1.438

1.509

123.17

108.32

Na₄ATA

1.290

1.426

1.511

122.90

108.73