In connection with the orientation of two carboxylate functional
groups, the inspection of related torsion angles reveals that
O(2)–C(1)–C(2)–N(1) and O(1)–C(1)–C(2)–N(1) are 1.8(4) and
178.4(3) while those of N(1)–C(6)–C(7)–O(4)and N(1)–C(6)–
C(7)–O(3) are 109.0(3) and 73.5(4), respectively. This clearly
suggests that the coordinated COO group is almost coplanar with
pyridine ring while the uncoordinated COO– is rotated by 73. To
verify if PdII atom is located in the pyridine plane, torsion angles
C5–C6–N1–Pd and C3–C2–N1–Pd were examined and found to
be 178.4(2) and 178.4(3), respectively