Syntheses and Characterization of the Coordination Compounds of N-(2-hydroxymethylphenyl)-C-(3′-carboxy-2′-hydroxyphenyl)thiazolidin-4-one

Abstract

A dry benzene solution of the Schiff base N-(2-hydroxymethylphenyl)-3′-carboxy-2′-hydroxybenzylideneimine upon reacting with mercaptoacetic acid undergoes cyclization and forms N-(2-hydroxymethylphenyl)-C-(3′-carboxy-2′-hydroxyphenyl)thiazolidin-4-one, LH3 (I). A MeOH solution of I reacts with Co(II), Ni(II), Cd(II), Zr(OH)2(IV), and UO2(VI) ions and forms the monomeric coordination compounds, [M(LH)(MeOH)3] [where M = Co(II), Ni(II)], [M′(LH)(MeOH)] [here M′ = Cd(II), UO2(VI)] and [Zr(OH)2(LH)(MeOH)]. The coordination compounds have been characterized on the bases of elemental analyses, molar conductance, molecular weight, spectral (IR, NMR, and reflectance) studies, and magnetic susceptibility measurements. I behaves as a dibasic tridentate OOS donor ligand in these compounds. The compounds are nonelectrolytes (ΛM = 3.8–8.9 mho cm2 mol−1) in DMF. A tetrahedral structure for [Cd(LH)(MeOH)] and an octahedral structure for the remaining compounds are suggested.

Syntheses, Characterization, and Biological Activities of Metal Complexes of N-(2-Carbamoylthienyl)-C-(3′-carboxy-2′-hydroxyphenyl) Azetidin-2-one with Some Di-, Tetra-, and Hexavalent Metal Ions

“…The ](C-S)(thiophene) stretch [20] of the ligand shifts from 645 cm −1 to lower energy by 50 cm −1 in IV, while it remains unchanged in the rest of the compounds. The absence of a band in the region 835-955 cm −1 due to the ](Zr=O) stretch [21] 1135 cm −1 due to the (Zr-OH) bending mode [22] also support the proposed structure, V of the present Zr(OH) 2 (IV) compound. VI exhibits the ] (O=Mo=O) and ] as (O=Mo=O) stretches at 950 and 918 cm −1 , respectively, [22].…”

“…Copper(II) acetate monohydrate, zinc(II) acetate dihydrate (SD's Fine); cobalt(II) acetate tetrahydrate, hexadecaaquaoctahydroxotetrazirconium(IV) chloride (BDH); ammonium molybdate(VI) tetrahydrate, acetyl acetone, methanol, triethylamine, chloroacetyl chloride (Ranbaxy); thiophene-2-carboxylic acid hydrazide (Acros Organics (USA)) were used as supplied for the syntheses. Bis(acetylacetonato)dioxomolybdenum(VI), hexadecaaquaoctahydroxotetrazirconium(IV) acetate, and 3-formylsalicylic acid were synthesized by following the mehods as reported earlier [8].…”

Synthesis, Characterization, and Antimicrobial Activities of Coordination Compounds of Aspartic Acid

“…Much attention is being paid to coordination compounds as potential antimicrobial agents in recent times. This is due to the improved activity of drugs administered as complexes [1][2][3][4][5][6]. It has been suggested that ligands with nitrogen and oxygen donor systems might inhibit enzyme production.…”

Physicochemical, Spectral, and Biological Studies of Mn(II), Cu(II), Cd(II), Zr(OH)2(IV), and UO2(VI) Compounds with Ligand Containing Thiazolidin-4-one Moiety

“…II exhibits a strong band at 2855 cm −1 due to the intramolecular H-bonded OH groups of phenolic and/or carboxylic acid moieties [23]. The appearance of this band almost at the same energy in the coordination compounds of the Zr(OH) 2 (IV) and UO 2 (VI) ions is indicative of the noninvolvement of the The absence of a band in the region 835-955 cm −1 due to the ](Zr=O) stretch [29] [25]. The presence of a broadband at 3445 cm −1 due to coordinated OH group and the appearance of a new medium intense band at 1125 cm −1 due to the (Zr-OH) bending mode [25] also support the proposed structure of the present Zr(IV) compound.…”

“…exhibits the ] (O=U=O) stretch [31] at 920 cm −1 . The force constant ( U-O ) and U-O bond length in the present compound are 7.03 mdyn/Å and 1.73Å, respectively [25].…”