Ni(II), Cu(II), Mn(II), and Fe(II) Metal Complexes Containing 1,3-Bis(diphenylphosphino)propane and Pyridine Derivative: Synthesis, Characterization, and Antimicrobial Activity

Table 2

The infrared spectral data (cm⁻¹) of the ligand and their complexes.

Assignment	DPPP	APY	Ni(II) complex	Cu(II) complex	Mn(II) complex	Fe(II) complex
υO-Hlattice water	—	—	3488-	—	—	3496-
υO-Hcoordinated water			3320	3315	3338	3360
υC=C	—	1617	1615	1624	1622	1608
υC=N	—	1473	1479	1482	1478	1480
P-PH	1440	—	1434	1433	1430	1430
υC-Nin ring	—	1028	1026	1030	1024	1027
ρOH2	—	—	738	739	734	736
P-C	690	—	694	691	687	681
M-O	—	—	510	504	505	507
M-N	—	—	482	470	474	476
M-P	—	—	448	440	432	434

υ: stretching and ρ: rocking.