Table 3: IR and NMR data for the reported complexes.


Complex IR data (cm−1) 1H NMR data (ppm)

υ(OH) υ(C=N) υ(C=C) υ(NO2)

[Co(L)2(H2O)2]3,436 (m,b)1,605 (s)1,539 (m)
1,454 (m)
1,404 (m)
1,239 (m)
[Ni(L)2(H2O)2]3,437 (m,b)1,606 (s)1,539 (m)
1,484 (m)
1,403 (m)
1,237 (m)
[Cu(L)(H2O)]CH3COO3,436 (m,b)1,611 (s)1,545 (m)
1,506 (m)
1,402 (m)
1,239 (m)
[Zn(L)(H2O)]CH3COO3,431 (m,b)1,611 (s)1,543 (sh)
1,474 (m)
1,407 (m)
1,238 (m)
 9.54 s (HC=N), 8.89–8.05 m (quinoline ring),
 7.90–6.68 (phenyl ring)
[Pd(HL)Cl2]3,133 (m,b)1,601 (s)1,544 (m)
1,505 (m)
1,385 (m)
1,232 (m)
 12.20 b,s (OH), 10.23 s (HC=N), 8.43–7.92 m
 (quinoline ring), 7.72–6.92 (phenyl ring)

m, medium; s, strong; b, broad; sh, shoulder.