Some New Hexacoordinated Aluminium(III) Complexes of Sterically Hindered Heterocyclic ß-Diketones and N-Protected Amino Acids : Preparation And Structural Considerations Based Upon Spectral [IR And NMR (1Η, 13C and 27Al)] Studies

Gupta, Ritu; Jain, Asha; Saxena, Sanjiv

doi:10.1515/mgmc.2009.32.2.65

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…[1][2][3][4][5] It has been realized early on that the hybrid materials can exhibit superior properties 6-9 as compared to their pure counterparts. The possibility to develop multifunctional materials 10 has provided further impetus in the field of hybrid materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Antimicrobial Activity of Zirconium (IV) Complexes

Sharma¹,

Jain²,

Saxena³

2012

Journal of the Korean Chemical Society

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ABSTRACT. Heteroleptic complexes of zirconium (IV) derived from bulky Schiff base ligands containing a sulphur atom and oximes of heterocyclic β-diketones of the general formula ZrLL' (where LH 2 = , R=-C 6 H 5 , -C 6 H 4 Cl(p) and L'H 2 = , R' = -CH 2 CH 3 , -C 6 H 5 , -C 6 H 4 Cl (p) were prepared by the reactions of zirconium tetrachloride with disodium salts of Schiff bases (L Na 2 ) and oximes of heterocyclic β-diketones (L' Na 2 ) in 1:1:1 molar ratio in dry refluxing THF. The structures of these monomeric zirconium (IV) complexes were elucidated with the help of elemental analysis, molecular weight measurements, spectroscopic (IR, NMR and mass) studies. A distorted trigonal bipyramidal geometry may be suggested for these heteroleptic zirconium (IV) complexes. The ligands (bulky Schiff base ligands containing a sulphur atom and oximes of heterocyclic β-diketones) and their heteroleptic complexes of zirconium (IV) were screened against A. flavus, P. aeruginesa and E. coli.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Antimicrobial Activity of Zirconium (IV) Complexes

Sharma¹,

Jain²,

Saxena³

2012

Journal of the Korean Chemical Society

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“…Various potential organic ligands have been used for the synthesis of organic derivatives of organoboron(III) (Singh et al, 2005;Swami et al, 2009;Yadav et al, 2010). N-Protected amino acids are an important class of organic ligands which display a diversifi ed mode of bonding (Saxena et al, 1991(Saxena et al, , 1992Surana and Saxena, 1996;Verma et al, 2004;Joshi et al, 2005;Sharma et al, 2007;Gupta et al, 2009) and their metal complexes exhibit signifi cant biological activities (Saxena et al, 1991). In view of the interesting results obtained in our previous communications (Gupta et al, 2010a,b;Sharma et al, 2010) and as an extension of our ongoing research work concerning the synthesis of organic derivatives of some trivalent and tetravalent elements, it was considered relevant to study the ligating capability of N-protected amino acids towards PhB(OH) 2 .…”

Section: Introductionmentioning

confidence: 99%

Some new N-protected amino acid derivatives of phenylboronic acid: preparation, structural chemistry and insight into structural aspects based on spectroscopic studies

Gupta

Jain

Saxena

2011

Main Group Metal Chemistry

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Some new 1,3-dihydro-1,3-dioxo-α -substituted-2H-isoindole-2-acetic acid derivatives of phenylboronic acid of compo-and -CH(CH 3 )C 2 H 5 ] have been prepared by the reaction of phenylboronic acid with N-protected amino acids in 1:1 and 1:2 molar ratios in dry refl uxing benzene. Plausible structures of these newly synthesized N-protected amino acid derivatives of phenylboronic acid have been proposed on the basis of physicochemical and spectroscopic studies. 11 B NMR data reveal the presence of tetracoordinated boron centers in these N-protected amino acid derivatives of phenylboronic acid.

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Diorganotin(IV) complexes of flexible N-protected amino acids and ketoximes: preparation and structure – antimicrobial activity relationship

2016

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Diorganotin(IV) complexes of flexible N-protected amino acids and ketoximes having the compositions Me2Sn [[Formula: see text]CHRCOO][ON = C6H10] (where R = –CH2CH(CH3)2, –CH(CH3)C2H5,–CH2C6H5, –CH(CH3)2) and Me2Sn[[Formula: see text]CHRCOO][ON=CR′R″] (where R = –CH2CH(CH3)2, –CH(CH3)C2H5, –CH2C6H5, R′ = R″ = CH3; R = –CH(CH3)C2H5, –CH2C6H5, –CH(CH3)2, R′ = CH3, R″ = C6H5) were prepared by the reaction of dimethyltin(IV) dichloride with sodium salts of flexible N-protected amino acids and ketoximes in 1:1:1 molar ratio in refluxing dry benzene. The synthesized complexes were characterized by elemental analyses and IR, multinuclear NMR (1H, 13C, and 119Sn), and mass spectral studies. Plausible structures of these complexes have been suggested on the basis of molecular weight measurements and spectral data. 119Sn NMR spectral data indicate the presence of pentacoordinated tin centres in these complexes. Some of the synthesized complexes and their ligands were also screened for their in vitro antimicrobial activity.

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Some New Hexacoordinated Aluminium(III) Complexes of Sterically Hindered Heterocyclic ß-Diketones and N-Protected Amino Acids : Preparation And Structural Considerations Based Upon Spectral [IR And NMR (1Η, 13C and 27Al)] Studies

Abstract: A number of new sterically hindered heterocyclic ß-diketones and N-protected amino acids -modified Al(OPr') 3 products of composition either Al[RC0C:C(0)N(C 6 H 5 )N:CCH3]t0 2 CCH(R')iiC(0)C 6 H 4 t(0)] 2

Cited by 6 publications

References 25 publications

Synthesis, Characterization and Antimicrobial Activity of Zirconium (IV) Complexes

Synthesis, Characterization and Antimicrobial Activity of Zirconium (IV) Complexes

Some new N-protected amino acid derivatives of phenylboronic acid: preparation, structural chemistry and insight into structural aspects based on spectroscopic studies

Diorganotin(IV) complexes of flexible N-protected amino acids and ketoximes: preparation and structure – antimicrobial activity relationship

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