Synthesis, Structural Characterization, and Antimicrobial Activity Evaluation of New Binuclear Niobium(V) Tartrate Complexes with Biologically Important Drugs

Table 3

Characteristic IR bands (cm⁻¹) of the ligands and their niobium(V) complexes.

Ligands/complex	ν(N–CH3)	ν(N–CH2) Hetero	ν as(OCO)	𝜈s(OCO)	ν as(Nb–O)	𝜈s(Nb–O)	ν(Nb–N)	ν(C–S)
DMH	ν(NH–CH3); 2830	2915	—	—	—	—	—	—
1	—	—	1710	1400	620	470	370	—
IMH	2655	2923	—	—	—	—	—	—
2	—	—	1690	1390	618	466	390	—
IPH	2560	2905	—	—	—	—	—	740
3	—	—	1705	1405	610	460	380	740
FPH	2585	2895	—	—	—	—	—	760
4	—	—	1695	1395	622	475	375	760
TMT	2530	2850	—	—	—	—	—	755
5	—	—	1705	1385	625	485	390	755