Synthesis, Spectroscopy, Theoretical, and Electrochemical Studies of Zn(II), Cd(II), and Hg(II) Azide and Thiocyanate Complexes of a New Symmetric Schiff-Base Ligand

Table 1

FT-IR (cm⁻¹) and UV-visible (nm) spectral data of the Schiff base and their complexes.

Compounds	𝜈CHarom.	𝜈CHaliph.	𝜈CHimin	𝜈C=Nasymm	𝜈C=Nsymm	𝜈(NO2)asymm	𝜈(NO2)symm	–SCN/–N3	𝜆max(𝜀, cm^−1, M^−1)
Ligand	3067 (w)	2935 (w)	2843 (w)	1635 (s)	1615 (m)	1522 (vs)	1345 (s)	—	298 (6927); 326 (sh) (7582)
ZnL(NCS)2	3062 (w)	2935 (w)	2863 (w)	1633 (s)	1610 (m)	1520 (vs)	1343 (s)	2065	323 (8737); 303 (sh) (8179)
ZnL(N3)2	3057 (w)	2918 (w)	2850 (w)	1633 (vs)	1611 (s)	1518 (vs)	1347 (s)	2062	293 (3566); 330 (sh) (2625)
CdL(SCN)(NCS)	3059 (w)	2917 (w)	2844 (w)	1632 (vs)	1612 (s)	1518 (vs)	1339 (s)	2058; 2097	339 (12697)
CdL(N3)2	3052 (w)	2924 (w)	2854 (w)	1636 (vs)	1616 (s)	1520 (vs)	1342 (s)	2046	333 (8840)
HgL(SCN)2	3057 (w)	2924 (w)	2854 (w)	1626 (vs)	—	1520 (vs)	1346 (s)	2117	335 (10494)
HgL(N3)2	3057 (w)	2921 (w)	2854 (w)	1632 (vs)	—	1520 (vs)	1343 (s)	2034	331 (10660)