Titanium(IV) Complexes of Unsymmetrical Schiff Bases Derived from Ethylenediamine and o-Hydroxyaldehyde/Ketone and Their Anti-microbial Evaluation
作者:Mohammad Nasir Uddin、D. A. Chowdhury、Kamrul Hossain
DOI:10.1002/jccs.201200169
日期:2012.12
The titanium(IV) complexes of the unsymmetrical Schiff base ligands (L) of ethylenediamine and salicylaldehyde, o‐hydroxyacetophenone, o‐hydroxynapthaldehyde have been prepared and characterized when unsymmetrical ligands are synthesized through in situ partial displacement of the symmetrical bis‐Schiffbases. Compounds have been characterized by elemental analysis, electronic, (Infra‐red) IR, 1H NMR
Uranyl Schiff base complexes as new heterogeneous catalysts for halogen exchange reactions between alkyl halides and elemental halogens
作者:H. Naeimi、Z. S. Nazifi
DOI:10.1007/s11172-015-1076-2
日期:2015.8
Mild and effective procedure for the halogenexchangereaction of alkyl halides with elemental iodine and bromine catalyzed with uranyl Schiff base complexes in various aprotic solvents was developed. Corresponding alkyl bromides and iodides were obtained with high yields within 20—70 min. The structures of the target products were confirmed by physical and spectroscopic data.
Evaluation of the kinetic and thermodynamic parameters for the thermal decomposition of bis(η5-cyclopentadienyl)titanium(IV) N,N'-bis(2-hydroxynaphthalene-1-carbaldene)alkenediamines
作者:Virendra Joshi、S.K. Jain、N.K. Kaushik
DOI:10.1016/0040-6031(92)85206-b
日期:1992.7
of the thermal degradation of (η5-C5H5)2Ti(SB) complexes (SB, Schiff base) has been investigated using thermogravimetric (TG) and differential thermal analysis (DTA) techniques. The order of reaction and activation energy were calculated from the TG curves and the enthalpy change was calculated from the DTA curve. From the evaluated kinetic parameters, a mechanism was suggested for the thermal degradation
Mononitrosyl derivatives of iron and cobalt complexes of quadridentate ligands from 2-hydroxy-1-naphthaldehyde and ethylenediamine, o-phenylenediamine, and 4-methyl-o-phenylenediamine
作者:Leslie F. Larkworthy、Soumitra K. Sengupta
DOI:10.1016/s0020-1693(00)85872-7
日期:1991.1
2-hydroxy-1-naphthaldehyde and ethylenediamine (naphth-enH2), o-phenylenediamine (naphth-phH2), and 4-methyl-o-phenylenediamine (naphth-mphH2) form with cobalt(II) acetate and iron(II) perchlorate in methanol under nitric oxide the tetragonal pyramidal mononitrosyls [M(NO)(naphth-en)], [M(NO)(naphth-ph)] and [M(NO)(naphthmph)], where M=Co or Fe. The ironcomplexes have temperature-independent magnetic moments corresponding
New tetradentate Schiff bases, their oxovanadium(IV) complexes, and some complexes of bidentate Schiff bases with vanadium(III)
作者:Nosheen Choudhary、David L. Hughes、Uwe Kleinkes、Leslie F. Larkworthy、G.Jeffery Leigh、Michael Maiwald、Celine J. Marmion、J.Roger Sanders、Gallenius W. Smith、Claas Sudbrake
DOI:10.1016/s0277-5387(96)00436-6
日期:1997.1
Abstract New vanadyl(IV) complexes of tetradentate Schiff-base dianions containing one, two or three carbon atoms between the two iminato-nitrogen atoms are described. The compounds are either mononuclear or polymeric, as shown by the value of v(V=O), and depending upon the Schiff-base dianion. There is no evidence for electron delocalization along the polymeric chains. Some vanadium(III) complexes