Results 221 to 230 of about 12,633 (256)

Lanthanide complexes of potentially heptadentate Schiff base ligands

Canadian Journal of Chemistry, 1982
The potentially heptadentate trianionic Schiff base ligands derived from tris(2-aminoethyl)amine and 3 mol of (substituted) salicylaldehyde react with lanthanide metal nitrates to form neutral 1:1 compounds of formula Ln(X-Saltren). Physicochemical measurements are described for the following complexes: Ln = La, Pr, Nd, Eu, Gd, Dy, Ho, Yb, X = 3,5-Cl2;
Elmer C. Alyea, Abdul Malek, Angelos E. Vougioukas   +2 more
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Two Schiff Base Ligands Derived from 1,2-Diaminoethane

Acta Crystallographica Section C Crystal Structure Communications, 1997
The structures of two Schiff base ligands, 2,2′-[(1,2-ethanediyl)bis(nitrilopropylidyne)]bisphenol, C20H24N2O2, (I) and 2,2′-{(1,2-ethanediyl)bis[nitrilo(phenyl)methylidyne]}bisphenol, C28H24N2O2, (II), are reported. The molecular structure of (I) is centrosymmetric and therefore has a trans conformation. The asymmetric unit for structure (II) contains
J. P. Corden, W. Errington, P. Moore, M. G. H. Wallbridge   +3 more
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Cobalt(III) Complexes Of Polydentate Schiff Base Ligands

Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1976
Abstract Cobalt(III) complexes incorporating polydentate Schiff base ligands have been prepared via iodine oxidation of a series of cobalt(II) precursors. Magnetic susceptibility and visible spectral measurements suggest that the materials are diamagnetic cobalt(III) complexes wherein the cobalt ion is in an octahedral or a pseudooctahedral environment.
J. H. Burness, J. G. Dillard, L. T. Taylor   +2 more
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Two Schiff Base Ligands Derived from 1,2-Diaminocyclohexane

Acta Crystallographica Section C Crystal Structure Communications, 1996
The crystal structures of the free ligands 2,2′-[(1,2-cyclohexanediyl)bis(nitrilomethylidyne)]bisphenol, C20H22N2O2, (I), and 2,2′-[(1,2-cyclohexanediyl)bis(nitriloethylidyne)]bisphenol, C22H26N2O2, (II), have been determined. In both molecules the N-O distances are indicative of intramolecular hydrogen bonding.
J. C. Cannadine, J. P. Corden, W. Errington, P. Moore, M. G. H. Wallbridge   +4 more
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ChemInform Abstract: An Enantiomerically Pure Schiff Base Ligand.

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. S. ABU‐SURRAH, T. V. LAINE, T. REPO, R. FAWZI, M. STEIMANN, B. RIEGER   +5 more
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Transition metal complexes of bidentate Schiff base ligands

Transition Metal Chemistry, 1999
New Schiff base ligands derived from vanillin (HL1), 4-dimethylaminobenzaldehyde (HL2) and 3,5-di-t-butyl-4-hydroxybenzaldehyde (HL3) with N-(pyridyl)-3-methoxy-4-hydroxy-5-aminobenzylamine (2) and their copper(II), cobalt(II), nickel(II), oxovanadium(IV) and zinc(II) transition metal complexes have been synthesized and characterized by elemental ...
Mehmet Tümer, Cumali Çelik, Hüseyin Köksal, Selahattin Serin   +3 more
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Thorium(IV) complexes with tetradentate Schiff base ligands

Transition Metal Chemistry, 1977
Some thorium(IV) complexes were synthesized with the tetradentate Schiff base ligands (N2O2 donor set) obtained by the condensation of ethylenediamine with salicylaldehyde (H2salen) or acetylacetone (H2 acacen). In all cases the neutral Schiff bases and not their anions are coordinated to the central thorium(IV) atom.
Kailash C. Dash, Hrudananda Mohanta
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Some cobalt complexes of binucleating Schiff base ligands

Inorganica Chimica Acta, 1980
Abstract The cobalt(II) complexes of three binucleating ligands have been prepared and characterized. The chemistry of these complexes has been examined, largely reactions in methanol solution. The dicobalt(II) complexes are readily oxidized to the di-cobalt(III) analogs, and these in turn are re-reduced to the parent complexes.
James H. Espenson, Garry W. Kirker
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METAL COMPLEXES OF NOVEL SYMMETRICAL SCHIFF BASE LIGANDS

Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 2001
Two novel symmetrical Schiff base ligands, H2L1 and H2L2, with tetradentate N2O2 and pentadentate N3O2 coordinating sites were prepared by the reaction of the aldehyde 2-methyl-7-formyl-8-hydroxy-quinoline with 1,3-diaminopropane or diethylenetriamine, respectively, in the molar ratio 2:1. Cu(II), Ni(II), Co(II), Mn(II), Fe(III) and VO(IV) complexes of
Kamal A. R. Salib, Shaker L. Stefan, Samy M. Abu El-Wafa, Hoda F. El-Shafiy   +3 more
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Copper(II) complexes of tridentate schiff base ligands

Inorganica Chimica Acta, 1982
Abstract Complexes of emperical formula CuLCl and CuL2 have been synthesized and characterized wherein L = the Schiff base formed from the condensation of selected salicylaldehydes (Z-SAL) with two polyamines, 2-aminomethylpyridine (AMP) and 2-(2-aminoethyl-pyridine (AEP).
Larry T. Taylor, W.M. Coleman (III)
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