Syntheses, spectroscopic, and magnetic properties of polystyrene-anchored coordination compounds of tridentate ONO donor Schiff base

Syntheses, spectroscopic and magnetic properties of polystyrene-anchored coordination compounds of thiazolidinone

“…The formation of II is further supported by the appearance of a new band at 830 cm -1 due to the ν(C--S)(thiazolidinone ring) stretch [24]. II occurs in the keto-form [25] as evident by the presence of a strong band due to the ν(C=O)(amide) stretch at 1650 cm -1 . This band remains almost at the same energy in Fe(III) and UO 2 (VI) compounds indicating the noninvolvement of the keto O atom towards coordination.…”

“…The Cd(II), Mn(II) and Ni(II) compounds do not display the ν(C=O)(amide) stretch but show a new band between 1235-1260 cm -1 suggesting the conversion of -C(O)NH-moiety (keto-form) into -C(OH)=N-moiety (enolform) followed by the deprotonation of enolic OH group and subsequently involvement of enolic O atom towards coordination. The ν(C--O)ф stretch [25] of II occurs at 1535 cm -1 . This band remains unchanged in the Fe(III) and UO 2 (VI) compounds indicating the non-involvement of phenolic O atom towards coordination.…”

Preparation and Spectroscopic Characterization of Polymer-Supported Transition Metal Complexes

“…The coordinated DMF is completely lost on heating the compounds for 3 h. With the use of dilute acids the metal ions can be easily extracted from coordination compounds. The IR spectral bands of polystyrene-anchored Schiff base, PSCH2-LH2 (I) and its compounds are given in Table-2. 3-Formylsalicylic acid exhibits ν(C=O)(COOH) stretch [20] at 1660 cm -1 . LH2 exhibits this band at 1670 cm -1 .…”

“…Chloromethylated polystyrene, PSCH 2 -Cl (1 g of resin have 1.17 mmol of Cl and its crosslinking with divinylbenzene is 1 %) [Sigma Chemical Co] acetylacetone, propylenediamine [Sarabhai M. Chemicals], Other chemicals (AR grade) were procured from the sources mentioned in our published report [19].…”

“…Analytical measurements: The metal ions were leached from their polymer anchored complexes and estimated as per the procedures reported earlier [19].…”