Study of uranyl complexes with new binucleating ligands involving amide and imine coordinating sites

Mixed ligand complexes of FeIII containing pseudohalides, nitrosyl and some mannich bases

“…This suggests high spin distorted octahedral geometry of iron(III) and strongly paramagnetic nature of these complexes. The magnetic moment values of [Fe(CN) 3 (Table 1) which corresponds to one unpaired electron depicting their paramagnetic behaviour. This suggests low spin distorted octahedral geometry of iron(III) in these complexes ( Table 2).…”

“…In complexes, [Fe(X) 3 (NO)(MBB)] where X = CN ) , NCO ) and N 3 ) , MBB = Morpholinobenzyl benzamide, the amide t(C=O) bands appeared at 1580-1590 cm )1 displaying substantial negative shifts with fairly low intensity indicating coordination through oxygen of amide moiety. The t(C-N-C) mode of morpholine appeared in the range 1080-1095 cm )1 , show a negative shift in complexes indicating the involvement of ring nitrogen (of morpholine entity present in the ligand) in coordination with iron.…”

“…In complexes, [Fe(X) 3 (NO)(PBB)] where X = CN ) , NCO ) and N 3 ) , PBB = Piperidinobenzyl benzamide, the amide t(C=O) band appeared at 1585-1595 cm )1 and t(C-N-C) of piperidine group appeared in the region 1105-1120 also show negative shift indicating coordination through the oxygen of amide moiety and nitrogen of piperidine ring. In all the complexes, t(N-H) band appeared in the region 3330-3425.…”

“…The proposed structure of the ligands (MBBH and PBBH) and one of the representative complex, [Fe(CN) 3 (NO)(MBB)] is as under: Table 6. Selected bond lengths (Å ) and bond angles (°) of [Fe(CN) 3 …”

“…The compounds containing the amide moiety have a strong tendency to form metal complexes and exhibit a wide range of biological activities [1][2][3][4]. The coordination chemistry of amide group has received much attention due to its diverse coordinating behaviour and the role it plays in biological processes [5].…”