Mithlesh Agrawal

MIXED LIGAND COMPLEXES OF ALKALINE EARTH METALS: PART-X. Mg(II), Ca(II), Sr(II) and Ba(II) COMPLEXES WITH 5-BROMOSALICYLALDEHYDE AND b-DIKETONES

Magnesium(II), calcium(II), strontium(II) and barium(II) complexes of the type [MLL¢(H2O)2] (where HL = 5-bromosalicylaldehyde and HL¢ = pentane-2,4-dione, 1-phenylbutane-1,3-dione or 1,3-diphenylpropane-1,3-dione) have been synthesized by 1:1:1 molar reactions of metal chlorides with 5-bromosalicylaldehyde and b-diketones. The resulting complexes have been characterized by elemental analyses, TLC, IR and 1H NMR spectra

Doudle Isopropoxides of Lanthanons with Aluminum: Tris(Diisopropoxoaluminiumdi-μ-isopropoxo) LN(III)

Methods of preparation for double isopropoxides of a number of lanthanons (La, Ce(III), Pr, Nd, Sm, Gd, Dy, Ho, Er, Yb and Lu) as well as yttrium and scandium with aluminium have been described.

Aluminium Complexes with Sulphur Containing Ligands

Abstract Reactions of Al(OPri)3 with some sulphur containing Schiff bases having or donor system have been investigated in different molar ratios. The reaction products from equimolar (M:L) ratios are dimeric, whereas 2:3 (M:L) ratios yield monomeric reaction products in boiling benzene. Based on elemental analysis, U.V., I.R. and NMR spectral studies possible structures have been indicated for the resulting compounds.

Mixed aldimine derivatives of aluminium

Abstract 1:1:1 Molar reactions of Al(OPr i ) 3 with monofunctional bidentate and bifunctional tridentate Schiff bases have yielded mixed Schiff base derivatives of the type (S′B′)Al(SB) (where S′B′ 2− and SB − are the anions of bifunctional tridentate and monofunctional bidentate Schiff bases respectively). If these complexes are monomeric, the central aluminium atom will be pentacoordinated, and this is suggested by the addition reaction with pyridine. Structures based on IR and NMR spectra have been suggested.

Alkali-metal hexa-alkoxides of niobium and of tantalum

Reactions of niobium and tantalum penta-alkoxides with corresponding alkali-metal alkoxides have been studied and a number of double alkoxides of the type MM′(OR)6 have been isolated (M = Li, Na, or K; M′= Nb or Ta; and R = Me, Et, Pri, or But). Tantalum derivatives can be purified by sublimation in a few cases whereas the niobium ones decompose to penta-alkoxides. Conductivities have been measured and molecular weights determined.

Mixed‐Ligand Complexes of Ni(II), Cu(II), and Zn(II) with 5‐Chlorosalicylaldehyde and β‐Diketones

Abstract Mixed‐ligand complexes of the types M(5‐Clsal)L and Ni(5‐Clsal)L(H2O)2 (where M = copper(II) or zinc(II), 5‐ClsalH = 5‐chlorosalicylaldehyde and HL = 2,4‐pentanedione, 1‐phenyl‐1,3‐butanedione, or 1,3‐diphenyl‐1,3‐propanedione) have been synthesized by 1:1:1 molar reactions of metal chlorides with 5‐chlorosalicylaldehyde and β‐diketones. The resulting complexes have been characterized by elemental analyses, TLC, conductances, thermal analysis, magnetic moments, IR, electronic, and 1H NMR spectra.

MIXED-LIGAND COMPLEXES OF ALKALINE EARTH METALS. IX. Mg(II), Ca(II), Sr(II), AND Ba(II) COMPLEXES WITH 5-BROMOSALICYLALDEHYDE AND SALICYLALDEHYDE, 2-HYDROXYACETOPHENONE, OR 2-HYDROXYPROPIOPHENONE

ABSTRACT Magnesium(II), calcium(II), strontium(II) and barium(II) complexes of the type MLL′(H2O)2 (where HL=5-bromosalicylaldehyde and HL′=salicylaldehyde, 2-hydroxyacetophenone or 2-hydroxypropiophenone) have been synthesized by 1:1:1 molar reactions of metal chlorides with 5-bromosalicylaldehyde and hydroxyaromatic aldehydes or ketones. The resulting complexes have been characterized by elemental analyses, TLC, IR and 1H NMR spectra.