Synthesis and spectroscopic studies of new organotin(IV) complexes with tridentate N- and O-donor Schiff bases

Sedaghat, Tahereh; Shokohi-pour, Zahra

doi:10.1080/00958970903180103

Cited by 39 publications

(13 citation statements)

References 37 publications

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“…investigations [141]. New organotin(IV) complexes with empirical formula Sn(SNNNS)R 2 , where SNNNS is the dianionic form of 2,6-diacetylpyridine Schiff bases of S-methyldithiocarbazate (H 2 dapsme) or S-benzyldithiocarbazate (H 2 dapsbz) and R¼Ph or Me, have been prepared and characterized.…”

Section: The Organotin(iv) Complexes [N-bu 2 Sn(c 9 H 8 N 3 O 3 )(H 2mentioning

confidence: 99%

Cadmium and tin complexes of Schiff-base ligands

Manju

Kishore

Kumar

2011

Journal of Coordination Chemistry

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Section: The Organotin(iv) Complexes [N-bu 2 Sn(c 9 H 8 N 3 O 3 )(H 2mentioning

confidence: 99%

Cadmium and tin complexes of Schiff-base ligands

Manju

Kishore

Kumar

2011

Journal of Coordination Chemistry

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“…The shifts in νC-N and νN-O modes to higher wavenumbers may be ascribed to electron delocalization due to resonance within the chelate ring resulting in more double bond character for C-N bond and strengthening of N-O bond. The presence of bands due to both ν sym Sn-C and ν asym Sn-C modes in (I) and (II) are consistent with a nonlinear Me-Sn-Me and n-Bu-Sn-n-Bu configuration [51][52][53] compared to the occurrence of only one νSn-C mode in trans arrangement of organic groups around tin. [54,55] The new bands observed in (I) and (II) at 492, 482 and 430, 444 cm −1 (not present in free ligand) assigned to νSn-O and νSn O modes respectively have further substantiated their formation.…”

Section: Ir Spectramentioning

confidence: 63%

Synthesis, characterization, thermal, computational and biological activity studies of new potential bioactive diorganotin (IV) nitrosubstitutedhydroxamates‐A comparative study

Choudhary

Bhatt

Dash

et al. 2020

Applied Organom Chemis

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The new diorganotin (IV) complexes of composition [Me2SnCl(3,5‐(NO2)2C6H2(OH)CONHO)] (I) and [n‐Bu2SnCl(3,5‐(NO2)2C6H2(OH)CONHO)] (II) have been synthesized by the reactions of Me2SnCl2 and n‐Bu2SnCl2 with potassium 3,5‐dinitrosalicylhydroxamate [3,5‐(NO2)2C6H2(OH)CONHOK]‐ a ligand of biological significance bearing –NO2 and –OH substituents presumed to yield complexes with efficient bioactivity. The complexes have been characterized by elemental analyses, IR, 1H, 13C and 119Sn NMR and mass spectrometry in order to study the ligational behavior and probale geometry around tin as the ligand might show different bonding modes and geometry in complexes. The geometries of (I) and (II) have been computed using B3LYP/6–31 + G(d,p) set by DFT method and the vibrational frequencies, 1H and 13C NMR spectra compared with the experimental data. A comparison of computed bond lengths (C=O, C‐N, and N‐O) of (I) and (II) with that of free ligand, the Sn‐O bond lengths, bond angles coupled with 119Sn NMR and IR spectral data have suggested coordination through carbonyl and hydroxamic oxygens (O, O coordination) displaying five‐coordinate distorted trigonal‐bipyramidal geometry around tin. The thermal behavior of (I) and (II) has been studied by thermogravimetric techniques (TGA, DTG, DTA) and various kinetic parameters have been calculated. The electrochemical behavior of ligand, (I) and (II) studied by cyclic voltammetric technique has shown ligand centered redection. The HOMO‐LUMO energies and orbitals, global reactivity descriptors, various thermodynamic parameters and dipole moment (μ) have been computed to determin the molecular properties of complexes. The in vitro antimicrobial activity assay against bacteria and fungi by MIC method has indicated higher potency of (I) than (II). The in vitro cytotoxicity on human muscle rhabdomyosarcoma (RD) by MTT method and the antioxidant potential by DPPH free radical scavenging showed higher inhibitory effect of complexes than ligand.

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“…These complexes play an important role either for assessing their performance as PVC stabilizers [14], biocides [15], antitumor agents [10,16,17], and anion-recognition agents [18], or for investigating different reactions, such as transesterification [19], acetylation of alcohols [20], and dehydration of alcohols [21]. In particular, diorganotin(IV) complexes derived from ligands containing nitrogen and oxygen donors have attracted much attention [4,[22][23][24][25][26][27][28][29]. In general, their biological activity is determined by the structures of the resulting molecules and, consequently, by the coordination number around the central tin [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and biological activity of trinuclear seven-coordinated tin(IV) complexes derived from tridentate ligands and trimesic acid

Chans

Muñoz-Hurtado

Hernández‐Ortega

et al. 2015

Journal of Coordination Chemistry

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2015): Synthesis and biological activity of trinuclear seven-coordinate tin(IV) complexes derived from tridentate ligands and trimesic acid, Journal of Coordination Chemistry, The synthesis of trinuclear Sn(IV) complexes 5a−h, prepared in a one-pot reaction of 2-amino-4-R-phenol (R = H, Me, Cl, NO 2 ), 2-pyridine-carboxaldehyde, 1,3,5-benzenetricarboxylic acid (trimesic acid, H 3 BTC) and dibutyl-and dioctyltin oxides, is described. These compounds were characterized by elemental analysis, mass spectrometry, IR and multinuclear NMR spectroscopy. The structures of 5a and 5b were also determined by single-crystal X-ray analysis. The trinuclear tin system is formed by bridges through the carboxylate moieties. The metal centers are seven-coordinate and the coordination polyhedron of tin can be depicted as distorted pentagonal-bipyramidal (PBP), where the equatorial plane consists of three oxygens and two nitrogens and the organic groups occupy the axial positions. The work presented here combines the useful properties of Schiff bases and H 3 BTC ligands in formation of organotin(IV) complexes and investigates the likely antioxidant (DPPH and TBARS) and antiinflammatory activity (TPA) of the new substances.

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Synthesis and spectroscopic studies of new organotin(IV) complexes with tridentate N- and O-donor Schiff bases

Cited by 39 publications

References 37 publications

Cadmium and tin complexes of Schiff-base ligands

Cadmium and tin complexes of Schiff-base ligands

Synthesis, characterization, thermal, computational and biological activity studies of new potential bioactive diorganotin (IV) nitrosubstitutedhydroxamates‐A comparative study

Synthesis and biological activity of trinuclear seven-coordinated tin(IV) complexes derived from tridentate ligands and trimesic acid

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