Synthesis, Characterization, Theoretical Crystal Structure, and Antibacterial Activities of Some Transition Metal Complexes of the Thiosemicarbazone (Z)-2-(pyrrolidin-2-ylidene)hydrazinecarbothioamide

Table 2

Infrared absorption frequencies (cm⁻¹) of Co(II), Ni(II), and Cu(II) complexes.

Compounds	ν(N–H)	ν(C=N)	ν(C–N)	ν(N–N)	ν(C=S)	ν(M–N)	v(M–S)	v(M–Cl)
Ligand	3395 s, 3275 s	1600 s	1330 s, 1200 m	1035 m	855 s, 770 s	—	—	—
C1	3330 m, 3265 m	1570 s	1380 s, 1240 m	1075 m	850 s, 780 m	525 m	440 m	350 w
C2	3320 m, 3260 m	1565 s	1380 s, 1235 m	1070 m	835 s, 780 m	535 m	420 m	355 w
C3	3385 m, 3275 m	1575 s	1365 s, 1240 m	1060 m	840 s, 795 m	520 m	430 m	360 m