A spectroscopic study of tin(IV) complexes with bidentate Schiff bases

Biradar, N.S.; Kulkarni, V.H.

doi:10.1016/0022-1902(71)80220-8

Cited by 89 publications

(13 citation statements)

References 10 publications

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“…In the 1 H NMR spectra of the ligands obtained in DMSO, two singlet peaks appear at 13.98 and 13.84 ppm for the protons of L 1 H 2 and L 2 H 2 , respectively. These two singlets disappear upon addition of D 2 O and are assigned to phenolic groups [21]. In the 1 H NMR spectra of L 1 H 2 and L 2 H 2 , the chemical shifts observed at 8.90 and 8.95 ppm are assigned to the protons of azomethine [22].…”

Section: Resultsmentioning

confidence: 98%

Synthesis, spectral characterization and electrochemical studies of copper(II) and cobalt(II) complexes with novel tetradentate salicylaldimines

Taş

Aslanoğlu

Ulusoy

et al. 2004

Journal of Coordination Chemistry

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Several new complexes of Schiff bases obtained by the condensation of 1,2-bis( p-aminophenoxy)ethane and 1,2-bis(m-aminophenoxy)ethane with 3,5-di-tert-butyl-2-hydroxybenzaldehyde have been synthesized, and characterized by elemental analyses, FT-IR, UV-VIS, 1 H NMR spectroscopy, magnetic susceptibility measurements and cyclic voltammetry. The metal to ligand ratios of the Co(II) and Cu(II) complexes were found to be 1 : 1. The coordination of the Schiff base appears to occur through the two azomethine nitrogens and two o-OH groups. Electrochemical data suggest the existence of copper(II)/copper(I) and cobalt(II)/cobalt(I) redox couples in DMSO along with an irreversible oxidation peak assigned to the oxidation of ligands for all of the complexes.

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Section: Resultsmentioning

confidence: 98%

Synthesis, spectral characterization and electrochemical studies of copper(II) and cobalt(II) complexes with novel tetradentate salicylaldimines

Taş

Aslanoğlu

Ulusoy

et al. 2004

Journal of Coordination Chemistry

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“…The strong bands at ,-1650 cm -1 and 1610 cm -1 are assignable to coordinated v(COO) and v(C= N) [1,[4][5][6][7][8] while the aromatic C~C bands appear at ~ 1550 cm -~ [8]. The band at 1300 cm -1 is evidence of a strong bonding of the metal ion with phenolic oxygen [9]. The presence of coordinated water molecules were confirmed by infrared spectra and were compared with the spectra of nickel(II), cobalt(II), manganese(II), and magnesium(II) complexes.…”

Section: Resultsmentioning

confidence: 98%

Zinc(II) complexes of salicylidene amino acids

Ray

Kauffman²

1989

Journal of Thermal Analysis

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Several zinc(II) complexes of tridentate dibasic salicylidene amino acids have been prepared and characterized. All of them possess dimeric pseudo-oclahedral structures, which were established on the basis of thermogravimetric analysis and superimposable infrared spectra of these complexes with those of manganese(II), cobalt(II), nickel(II), and magnesium(I1) complexes.Manganese(II), cobalt(II), nickel(II), and magnesium(II) complexes of salicylideneglycine (salglyH/H2) (I) have dimeric pseudo-octahedral structures (II) through coordination of water molecules in the trans apical sites [14]. The salicylideneleucine Schiff base complex of manganese(II) favoured a four-coordinated anhydro dimeric structure (III) [1]. Bis(salicylideneglycinato)zinc(II) and other related complexes have been synthesized and characterized. Dimeric structures of these complexes have been established by thermogravimetric analyses and superimposable infrared spectra of the related complexes. ExperimentalTo a warm solution of salicylaldehyde (0.5 g in 10 ml of ethanol) a hot aqueous solution of glycine (0.3 g in 5 ml of water) was added and the solution refluxed for 30 minutes on a steam bath. To this clear solution an ethanolic solution of zinc(II) acetate (0.75 g in 20 ml of ethanol) was added with stirring, and the resulting solution was refluxed, whereupon white crystals began to separate. After 30 minutes of refluxing the crystals were collected by filtration, triturated with hot

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“…The thermodynamic properties of these complexes have been studied extensively [4][5][6][7]. In our last work, the relationships between the steric and the electronic effects on the stability of the salen Schiff base pentacoordinate complexes were reported [8,9].…”

Section: Introductionmentioning

confidence: 98%