Innere Komplexsalze der Aldimin‐ und Azoreihe

Pfeiffer, P.; Hesse, Th.; Pfitzner, Hans; Scholl, W.; Thielert, H.

doi:10.1002/prac.19371490801

Cited by 190 publications

(62 citation statements)

References 9 publications

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“…Pfeiffer et al (6) have reported that the Schiff bases (2) derived from salicylaldehyde or substituted salicylaldehyde and m-aminophenol do not form metal complexes, and we have also verified this for copper(ll) and oxovanadium(IV) in our laboratory. It would be interesting to see whether the Schiff bases of type (3) derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol will form metal complexes.…”

Section: Introductionsupporting

confidence: 79%

Syntheses of new oxovanadium(IV) complexes with some new Schiff bases derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol

Syamal

1978

Transition Met Chem

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SummaryThe syntheses of several new oxovanadium(IV) complexes of new Schiff bases derived from salicylaldehyde, 5-ch orosalicylaldehyde, 5-bromosalicylaldehyde, 5-nitrosalicylaldehyde, 4-methoxysalicylaldehyde, 2 -hydroxy-1-naphthaldehyde and 3-aminothiophenol are described. The complexes, which are of the VOL2 type, have been characterized on the basis of elemental analysis, i.r. and electronic absorption spectra, and magnetic susceptibility measurements. The Schiff bases behave as bidentate ligands and a five-coordinate square-pyramidal structure is suggested for the complexes which exhibit two or three spin-allowed d-d bands at ca. 12000, 17000 and 22000 cm -l. The u(V=O) vibration occurs in the 940-980 cm -1 range. The complexes exhibit normal magnetic moments (#eff = 1.71--1.73 B.M.) at room temperature.

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Section: Introductionsupporting

confidence: 79%

Syntheses of new oxovanadium(IV) complexes with some new Schiff bases derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol

Syamal

1978

Transition Met Chem

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“…The reagent H 2 SA 2 en and its copper(II), nickel(II), iron(III), and dioxouranium(VI) complexes were prepared as reported [35]. The reagent H 2 SA 2 en was prepared by simple condensation of salisylaldehyde with ethylenediamine in 2:1 molar ratio in ethanol.…”

Section: Chemicals and Equipmentsmentioning

confidence: 99%

“…1) has been exclusively studied as the complexing reagent for copper(II), nickel(II), palladium(II), platinum(II), iron(II), iron(III), cobalt(II), cobalt(III), manganese(II), oxovanadium(IV), oxochromium(V), dioxomolybdenum(VI), and dioxouranium(VI) [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. The uranyl complex of H 2 SA 2 en was reported as early as 1937 [35]. Pasini et al [24] and El-Sonbati [37] have reported the nature of uranyl complex with tetradentate shiff bases including H 2 SA 2 en.…”

Section: Introductionmentioning

confidence: 99%

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

2008

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An analytical procedure has been developed for the separation of dioxouranium(VI), iron(III), copper(II), nickel(II), cobalt(II), cobalt(III), palladium(II), and thorium(IV) by MEKC using N,N'-ethylene bis(salicylaldimine) (H(2)SA(2)en) as a complexing reagent with total runtime <4.5 min. SDS was used as micellar medium at pH 8 with sodium tetraborate buffer (0.1 M). An uncoated fused-silica capillary with an effective length of 50 cm x 75 microm id was used with an applied voltage of 30 kV with photodiode array detection at 231 nm. Linear calibrations were obtained within 0.111-1000 microg/mL of each element with LODs within 37-325 ng/mL. The developed method was tested for analysis of uranium ore samples indicating its presence within 103-1789 microg/g with RSD within 0.79-1.87%. Likewise copper, nickel, and iron in their combined matrix were also simultaneously determined with RSD 0.4-1.6% (n = 6).

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“…The ir spectra are consistent with the formation of H 4 L 1 and H 2 L 2 ligands. The vibrational assignments were aided by comparison with the vibrational frequencies of the related compounds, such as, the Schiff bases of salicylaldehyde [16,17]. The fundamental stretching mode of the azomethine moiety, m(-C=N-), is readily assigned by comparison with the infrared spectra of 4,6-diacetylresorcinol (DAR), o-aminophenol and ophenylenediamine.…”

Section: Schiff Base Ligandsmentioning

confidence: 99%

Synthesis and spectroscopic studies of new binuclear transition metal complexes of Schiff bases derived from 4,6-diacetylresorcinol

Emara

Adly

2007

Transition Met Chem

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Two new series of copper(II), nickel(II), cobalt(II), zinc(II), iron(III), chromium(III), vanadyl(IV) and uranyl(VI) complexes with two bifunctional tridentate Schiff base, H 4 L 1 and H 2 L 2 ; ligands have been prepared. The Schiff base, H 4 L 1 and H 2 L 2 , ligands were synthesized by the condensation of 4,6-diacetylresorcinol with o-aminophenol or o-phenylenediamine. The ligands are either di-or tetra-basic with two symmetrical sets of either OON or NNO tridentate chelating sites. The ligands and their metal complexes have been characterized by elemental analysis, 1 H-n.m.r., FT-IR, mass, electronic, esr spectra and thermal gravimetric analysis and magnetic susceptibility. With the exception of Co II ion with H 2 L 2 which afforded a trinuclear complex, a variety of binuclear complexes for the rest of the metal complexes were obtained with the ligands in its di-or tetra-deprotonated forms. The bonding sites are the azomethine and amino nitrogen atoms, and phenolic oxygen atoms. The metal complexes exhibit different geometrical arrangements such as square planar, tetrahedral, square pyramid and octahedral arrangement.

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Innere Komplexsalze der Aldimin‐ und Azoreihe

Cited by 190 publications

References 9 publications

Syntheses of new oxovanadium(IV) complexes with some new Schiff bases derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol

Syntheses of new oxovanadium(IV) complexes with some new Schiff bases derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

Synthesis and spectroscopic studies of new binuclear transition metal complexes of Schiff bases derived from 4,6-diacetylresorcinol

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