Table 2 Prominent IR Raman spectral bands observed in AH3 and AH7 (ν cm^-1)

3309 (s, NH and OH), 3062 (w, CH), 1649(w, NH), 1595 (s, 'aromatic ring'), 1444 (s, 'aromatic ring'), 1281 (s, OH), 1213 (w, CO), 1105 (w, CO), 1028 (ring stretch), 798 (m, CH), 687 (m, CH), 580 (w, Pt-N), 546 (m, Pt-N), 514 (m, Pt-N), 432 (m, pyridine ring)

3076 (m, NH), 2467 (m br, CH) 1603 (w, NH), 1030 (s, CH), 866 (m, CH), 664 (w, pyridine ring), 519 (w, Pt-N(NH₃)), 330 (m, Pt-N(3-hydroxypyridine)), 243 (w, Pt-N(2-hydroxypyridine)), 122 (s, Pt-N), 81 (m, lattice)

3192 (s br, NH and CH stretch), 1614 (m, NH bending), 1539 (s, aromatic ring stretch), 1371 (m, CH bending), 1302 (s, ring in-plane deformation), 1211 (m, CH in-plane bending of heterocyclic ring), 777 (w d, ring out-of-plane deformation), 496 (w, Pt-N stretch)

3562 (w, NH stretch), 3314 (s, NH stretch), 2806 (m, CH stretch), 2361 (m, ring stretch), 1537 (m, NH bending), 1030 (s, CH in-plane bending), 797 (m, ring out-of-plane deformation), 346 (m, Pt-Cl stretch), 95 (m, ring bending)