Abstract

Ramadhar Sharma, S. N. Sharma* and P. K. Ambastha*

Stable Iron (II) derivatives of monobasic/dibasic bidentate/tridentate triazene-1-oxides (TH, TH2) are described. Iron (II) complexes of triazene-1-oxides have been prepared by using (1) MOhr's salt, as starting material and (2) freshly prepared iron(II) compounds. Aqueous-ethnolic Fe (II) compounds were reacted with TH, TH2 under inert atmosphere deaerated water. Light green and grassy green derivatives were obtaoned after refluxing the aqueous-ethnolic solution of iron (II) compounds with ethnolic solution of TH, TH2. Complexes were characteriesed by (i) elemental analysis (ii) conductance measurements, (iii) magnetic moment values (iv) electronic spectra, (v) moleculer weights in freezing benzene and (vi) i.r. spectral studies in the range 200-4000cm-1 Csl discs. The iron (II) derivatives of TH and TH2 conform to the stoichiometries (FeT2.2L and Fe T.L) in case of monobasic and dibasic triazene-1-oxides. (L=monodenate N-and O-donor ligands such as ammonia, 10 amino, 20 amine, pyridine, pyridine N-orthophenan thro(ine). On the basis of physical measurement data octahedral sterochemistry in case of (Fe T2. 2L or FeT2 L) (dipy, O-phen) have been assigned and tetrahdral stereochemistry in case of Fe T.L (L= monodentate ligand) and five coordinate in case of dibasic triazene-1-oxides (TH2) and bidentate (dipy and O-phen). All iron (II) derivatives were found tobe monomeric in freezing benzene and non electrolyte in nitromethene, I.R. spectra indicate involvement of both N- and O- donors atom engaged in bonding with iron (II) magnetic moment values and electronic spectra suggest d2sp3 hybridization of Fe (II) complexes.

triazene-1-oxides; TH, TH2; characteriesed; O- donors atom; sugges

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