132995-05-2Relevant articles and documents
A polymer-bound oxidovanadium(IV) complex prepared from an L-cysteine-derived ligand for the oxidative amination of styrene
Maurya, Mannar R.,Kumar,Correia, Isabel,Adao, Pedro,Pessoa, Joao Costa
, p. 577 - 587 (2008)
The ligand H2sal-cys (I) derived from salicylaldehyde and Lcysteine has been covalently bonded to chloromethylated polystyrene cross-linked with 5% divinylbenzene. Upon treatment with [VO(acac)2] in dimethylformamide (DMF) the polystyrene-bound ligand PS-H2sal-cys (II) gave the oxidovanadium(IV) complex, PS-[VO(sal-cys)·DMF] (1). The corresponding neat complex, [VO(sal-eta)]2 (2), has also been prepared similarly in methanol. These complexes have been characterised by IR, electronic, EPR spectroscopic studies, magnetic susceptibility measurements and thermal as well as scanning electron micrographs studies. Complex [VO-(sal-eta)]2 exhibits a medium intensity band at 980 cm -1 in the IR spectrum due to ν(V=O) stretch. Broad features of the EPR spectrum for the neat complex along with magnetic susceptibility studies suggest the presence of antiferromagnetic exchange interaction between two vanadium centers in close proximity. Both complexes catalyze the oxidative amination of styrene, in mild basic conditions, with secondary amines (diethylamine, imidazole, and benzimidazole) and gave a mixture of two aminated products in good yields. Amongst the two aminated products, the anti-Markovnikov product is favored over the Markovnikov one due to the steric hindrance posed by the secondary amines. The polymeranchored heterogeneous catalyst is free from leaching during catalytic action and recyclable. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
Molybdenum(VI) Complexes of Schiff Bases Derived from Salicylaldehyde and 2-Aminoethanethiol (Cysteamine)
Goh, Wai-Kah,Lim, Meng-Chay
, p. 2235 - 2242 (1984)
The reaction of salicylaldehyde and 2-aminoethanethiol (cysteamine) in methanol results in two distinct products: a yellow oil, 2-(2"-mercaptoethyliminomethyl)phenol, and a yellow crystalline solid, 2,2'-bisphenol, which is an oxidation product of the former.The latter compound may also be prepared from salicylaldehyde and 2,2'-dithio-bis(ethylamine)(cystamine)in methanol. 2-(2"-Mercaptoethyliminomethyl)phenol reacts with MoO2(acac)2 (acac=pentane-2,4-dionate) in methanol to yield a red crystalline solid with empirical formula MoO2(mep) .This red solid exists as a dimer in the solid state.It forms adducts with dimethyl sulfoxide, hexamethylphosphoric acid triamide and pyridine. 2,2'-bisphenol reacts with MoO2(acac)2 to yield a pale yellow solid.It is a monomeric compound whose formula is MoO2(dbp) bisphenolate>.It does not form an adduct and is decomposed by an excess of tetramethylammonium hydroxide in methanol.
Some quantum chemical study on the structural properties of three unsymmetrical Schiff base ligands
Sheikhshoaie, Iran,Saheb, Vahid,Iranmanesh, Parisa
, p. 265 - 270 (2014/06/24)
In this studythree Schiff base ligands derived of 2-hydroxybenzaldehyde: H2L1, H2L2 and H2L 3 have been subjected to theoretical studies by using density functional theory (DFT) calculation
N,S,O-Containing organic ligands based on salicylaldehyde and 2-thiosubstituted ethylamines and their complexes with CoII, Ni II, and CuII
Beloglazkina,Majouga,Chernysheva,Rakhimov,Zyk
, p. 1374 - 1379 (2008/09/18)
The reaction of 2,2'-di(2-hydroxybenzaliminoethyl) disulfide (H 2L1) and 2-[(2-thioethyl)iminomethyl]phenol (H 2L2) with MCl2?xH2O (M = Co, Ni, Cu) afforded the [M2(L1
