نتایج جستجو برای: type schiff base extractants

تعداد نتایج: 1572069  

Journal: :Communications, Faculty Of Science, University of Ankara Series B Chemistry and Chemical Engineering 1992

2008
Ming-Qian Feng Jing Li Wen-Jie Wei Chang-Hong Liu

The title complex, [Fe(C(12)H(9)ClNO(2))(3)], is a mononuclear Schiff base iron(III) compound. The Fe atom is six-coordinated by three phenolic O and three imine N atoms from three Schiff base ligands in an octa-hedral geometry.

ژورنال: طلوع بهداشت یزد 2013
احرامپوش, محمدحسن, امرالهی, محسن , جمشیدی, بهزاد , طباطبایی, معصومه , عسکر شاهی, محسن , قانعیان, محمدتقی ,

  Background: The heavy metals are the most important pollutants their concentration of which in the environment is increasing in connection with cities and industrials development. One of these metals is chromium which, in the trivalent and Hexavalent oxidation state, is used in industries such as electroplating, glass, ceramic, tannery and leather. Hexavalent Chromium has proven several healt...

Journal: :Australian Journal of Chemistry 1966

Journal: :Journal of The Japan Petroleum Institute 1979

2011
N. Padma Priya S. Arunachalam V. Chinnusamy C. Jayabalakrishnan

An octahedral ruthenium(II) Schiff base complexes of the type [Ru(CO)(Py)L] (L = dianion of the Schiff bases derived from acetoacetanilide with o-phenylenediamine and salicylaldehyde/ohydroxyacetophenone/o-vanillin/2-hydroxy-1-naphthaldehyde) have been synthesized from the reactions of equimolar ratio of [Ru(CO)(PPh3)2(Py)] and Schiff bases in benzene. The formation of the Schiff base ligands a...

2010
Long-Wei Lei Yin-Zhi Jiang Yang Zou

The ligand N-(2-hydr-oxy-3-methoxy-benzyl-idene)glycylglycine (H(3)L), a Schiff base derived from glycylglycine and 3-methoxy-salicylaldehyde, was used in the synthesis of a new organic-inorganic coordination complex, [Mn(H(2)O)(6)][Cu(C(12)H(11)N(2)O(5))](2)·6H(2)O. The Mn(II) atom is located on an inversion center and is coordinated to six water mol-ecules in a slightly distorted octa-hedral ...

Journal: :Acta crystallographica. Section D, Biological crystallography 2014
Samuel H Light George Minasov Mark-Eugene Duban Wayne F Anderson

The Bürgi-Dunitz angle (αBD) describes the trajectory of approach of a nucleophile to an electrophile. The adoption of a stereoelectronically favorable αBD can necessitate significant reactive-group repositioning over the course of bond formation. In the context of enzyme catalysis, interactions with the protein constrain substrate rotation, which could necessitate structural transformations du...

2006
Mark J. MacLachlan

Shape-persistent conjugated macrocycles are challenging synthetic targets with interesting properties and potential for a number of applications. In contrast to the standard kinetic approaches to macrocycles, reversible Schiff-base condensation offers a one-step, thermodynamic route to large macrocycles. These macrocycles, which feature “salen”-type coordination environments and an interior tha...

2010
S. Prasad R. Rajavel

Complexes of Cu(II), Ni(II) and Mn(II) containing a novel homotrinuclear Schiff base metal complexes were synthesized by using 2,3-pentanedione, p-phenylenediamine and 2-aminobenzaldehyde. The complexes of the type [LM 3 Cl 6 ]. The characterization and nature of bonding of the trinuclear complexes have been deduced from elemental analysis, molar conductivity, FT-IR, UV-visible, magnetic and EP...

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