Vanadium complexes with quadridentate Schiff bases

Yaul, A. R.; Pethe, Gaurav B.; Deshmukh, Rajesh D.; Aswar, A. S.

doi:10.1007/s10973-012-2745-0

Cited by 20 publications

(13 citation statements)

References 25 publications

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“…The frequencies for O=V=O bonds in all tridentate complexes were nearly similar which is an indication that all tridentate complexes have VO2 + groups. These are well within the range expected for dioxovanadium(V) compounds and in agreement with the other results [27]. v) The IR spectrum of tridentate ligands (Lg-Lh) exhibit ν(C-O) (phenolic) stretches at 1645 and 1580 cm -1 .…”

Section: Infrared Spectrasupporting

confidence: 91%

“…This is further supported by the presence of a new low frequency band in the region 491-531 cm -1 in the IR spectra of the vanadium complexes assigned to ν(V-N) [25,26]. iii) The spectra of the bidentate complexes show a sharp strong band in the range 949-979 cm -1 indicative of the presence of ν(V=O) stretch [27]. iv) Two strong bands identified in the vanadium complexes with tridentate ligands spectra in the range 949-968 and 968-979 cm -1 can be assigned to symmetrical ν(O=V=O) and asymmetrical ν(O=V=O) stretching vibrations, respectively [28].…”

Section: Infrared Spectramentioning

confidence: 61%

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Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Zabin

Abdelbaset

2016

Eur. J. Chem.

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Vanadium complexes containing Schiff base ligands are of great importance and have numerous applications. A series of Schiff base ligands derived from 4-amino-5-mercapto-3phenyl-1,2,4-triazole and different aldehydes were synthesized and combined with ammonium metavanadate in 2:1 and 1:1 molar ration to yield oxo-and dioxo-vanadium(V) complexes NH4[VO(La-f)2] and NH4[VO2(Lg-h)2], respectively. The structure of the synthesized compounds was confirmed by elemental analysis, UV, IR, NMR, MS and TGA. Complexes with bidentate and tridentate ligands were expected to possess a distorted square-pyramidal structure. The ligands and their complexes have been examined for antimicrobial activity against six types of bacteria and one kind of fungus that widely distributed in Albaha region, Kingdom of Saudi Arabia. The results indicate that some of the complexes were active against C. albicans fungus when used as powder, and no sound activity were shown against any type of tested bacteria.

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Section: Infrared Spectrasupporting

confidence: 91%

Section: Infrared Spectramentioning

confidence: 61%

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Zabin

Abdelbaset

2016

Eur. J. Chem.

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“…Different peaks in the region (880-831) cm -1 and (744-765) cm -1 which could be assigned to rocking and wagging modes of aqua complexes (12,13), respectively. The loss of water molecules at relatively high temperature suggest that these are coordinated and not lattice held (14).In the low frequency region, spectra of metal (II) complexes exhibit new bands which are not present in the spectra of ligand, these bands are located at (484-584) cm -1 and (427-504)cm -1 which are attributed to ν(M-O) and (M-N) (13,15,16), respectively. The coordination of chloride could not be inferred from the infrared spectra of the complexes because the band occurred beyond the range of our infrared spectrophotometer but was tested by AgNO 3 analysis.…”

Section: Ir Spectramentioning

confidence: 98%

Preparation and Study of Some New Schiff Base Complexes of Co(II), Ni(II) and Cu(II)

Chemistry¹

2013

J.Edu.Sci.

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‫اﻟﺧﻼﺻﺔ‬ : ‫اﻟﺑﺣث‬ ‫ﻫذا‬ ‫ﯾﺗﺿﻣن‬ ‫ﺗﺣﺿﯾر‬ ‫اﻟﻠﯾﻛﺎﻧد‬ ) ‫ا‬ ‫ﺑﺎر‬ -‫ﯾﻠﯾدﯾن‬ ‫ﺑﻧز‬ ‫ﻓﻧﯾل‬ ‫ﻫﯾدروﻛﺳﻲ‬ ( ‫ﻗﺎﻋدة‬ ‫ﻧوع‬ ‫ﻣن‬ ‫ا‬ ‫ﺑﺎر‬ ‫ﺑﯾن‬ ‫اﻟﺗﻛﺛﯾف‬ ‫ﺗﻔﺎﻋل‬ ‫ﻣن‬ ‫ﺷﯾف‬ -‫ﻣﻔﺎﻋﻠﺗﻪ‬ ‫ﺑﻌد‬ ‫ﻣﻌﻘدات‬ ‫ﻣﻧﻪ‬ ‫وﺣﺿرت‬ ‫ﻟدﯾﻬﺎﯾد،‬ ‫اﻟﺑﻧز‬ ‫و‬ ‫ﻓﯾﻧول‬ ‫أﻣﯾﻧو‬ ‫ﺑﻧﺳﺑﺔ‬ ‫اﻟﺛﻧﺎﺋﯾﺔ‬ ‫اﻟﻧﺣﺎس‬ ‫و‬ ‫اﻟﻧﯾﻛل‬ ‫و‬ ‫اﻟﻛوﺑﻠت‬ ‫ﯾدات‬ ‫ﻛﻠور‬ ‫ﻣﻊ‬ ) ١:١ ( ‫اﻟﻘﺎﻋدي‬ ‫و‬ ‫اﻟﻣﺗﻌﺎدل‬ ‫اﻟوﺳط‬ ‫ﻓﻲ‬ . ‫اﻟﻣﺣﺿ‬ ‫اﻟﻣﻌﻘدات‬ ‫ﺷﺧﺻت‬ ‫وﻗد‬ ‫ﻣﻧ‬ ‫اﻟﻣﺧﺗﻠﻔﺔ‬ ‫اﻟﻛﯾﻣﯾﺎﺋﯾﺔ‬ ‫و‬ ‫ﯾﺎﺋﯾﺔ‬ ‫اﻟﻔﯾز‬ ‫ﺑﺎﻟطرق‬ ‫ة‬ ‫ر‬ ‫ﻬﺎ‬ ‫ﻗﯾﺎس‬ ‫اء‬ ‫اﻟﺣﻣر‬ ‫ﺗﺣت‬ ‫اﻷﺷﻌﺔ‬ ‫ﻗﯾﺎﺳﺎت‬ ‫اﻟﻣﻐﻧﺎطﯾﺳﯾﺔ،‬ ‫اص‬ ‫اﻟﺧو‬ ‫ﺑﺎﺋﻲ،‬ ‫اﻟﻛﻬر‬ ‫اﻟﺗوﺻﯾل‬ ‫اﻟﻔﻠز،‬ ‫ﻣﺣﺗوى‬ ‫اﻻﻟﻛﺗروﻧﯾﺔ‬ ‫اﻷطﯾﺎف‬ ‫و‬ . ‫اﻟﺻﯾﻐﺔ‬ ‫ذات‬ ‫اﻟﻣﻌﻘدات‬ ‫ﻋﻠﻰ‬ ‫اﻟﺣﺻول‬ ‫وﺗم‬ [M 2 (LH) 2 (H 2 O) 4 Cl 4 ] ‫اﻟوﺳط‬ ‫ﻓﻲ‬ ‫اﻟﻣﻌﻘدات‬ ‫ﻋﻠﻰ‬ ‫اﻟﺣﺻول‬ ‫ﺗم‬ ‫ﺣﯾن‬ ‫ﻓﻲ‬ ‫اﻟﻣﺗﻌﺎدل،‬ ‫اﻟﺻﯾﻐﺔ‬ ‫ذات‬ [M 2 (L) 2 (H 2 O) 6 Cl 2 ] ‫ﻓﻲ‬ ‫ﺣﯾث‬ ‫اﻟﻘﺎﻋدي‬ ‫اﻟوﺳط‬ ‫أن‬ : M =Cu(II), Ni(II), Co(II), LH =C 13 H 11 NO, L =C 13 H 10 NO ‫ﻓﻲ‬ ‫اﻟﺳن‬ ‫ﺛﻧﺎﺋﻲ‬ ‫ﺑﺷﻛل‬ ‫ﯾﻌﻣل‬ ‫اﻟﻠﯾﻛﺎﻧد‬ ‫ﺑﺄن‬ ‫اء‬ ‫اﻟﺣﻣر‬ ‫ﺗﺣت‬ ‫اﻷﺷﻌﺔ‬ ‫اﺳﺎت‬ ‫در‬ ‫ﻣن‬ ‫وﺟد‬ ‫وﻟﻘد‬ ‫اﻟوﺳط‬ ‫اﻟﻣﺗﻌﺎدل‬ ‫ذ‬ ‫ﺧﻼل‬ ‫ﻣن‬ ‫ﺗﺑط‬ ‫ﯾر‬ ‫ﺣﯾث‬ ‫اﻟﻘﺎﻋدي،‬ ‫اﻟوﺳط‬ ‫ﻓﻲ‬ ‫اﻟﻘﺎﻋدة‬ ‫أﺣﺎدي‬ ‫و‬ ‫ﻓﻲ‬ ‫اﻟﻧﺗروﺟﯾن‬ ‫ة‬ ‫ر‬ ‫اﻷ‬ ‫زوﻣﯾﺛﺎ‬ ‫ﯾ‬ ‫اﻟﻔﯾﻧوﻟﯾﺔ‬ ‫اﻷوﻛﺳﺟﯾن‬ ‫ة‬ ‫وذر‬ ‫ن‬ . ‫اﻟﺣﺳﺎﺳﯾﺔ‬ ‫و‬ ‫اﻻﻟﻛﺗروﻧﯾﺔ‬ ‫اﻷطﯾﺎف‬ ‫ﻗﯾم‬ ‫ﺧﻼل‬ ‫ﻣن‬ ‫اﺗﺿﺢ‬ ‫وﻗد‬ ‫اﻟﻣﻌﻘدات‬ ‫ﺑﺄن‬ ‫اﻟﻣﻐﻧﺎطﯾﺳﯾﺔ‬ ‫ذات‬ ‫اﻟﺗﻧﺎﺳق‬ ‫ﺳدﺳﺎﯾﺔ‬ ‫اﻟﻣﺗﺟﺎﻧﺳﺔ‬ ‫اﻟﻧوى‬ ‫ﺛﻧﺎﺋﯾﺔ‬ ‫اﻟﺳطوح‬ ‫ﺛﻣﺎﻧﻲ‬ ‫ﺑﻧﯾﺔ‬ ‫اﺣﺗﻣﺎﻻ‬ ‫اﻷﻛﺛر‬ ً . Abstract:The ligand (LH) [P-hydroxy phenyl benzilidene] derived from a condensation product of p-hydroxy aniline and benzaldehyde and its complexes with Cobalt(II), Nickel(II) and Copper(II) has been synthesized and characterized by metal analysis molar conductance, magnetic moments, Infrared Spectra. The complexes were observed to Preparation and Study of Some New Schiff Base Complexes of Co(II), Ni(II) ... 2have an octahedral geometry around central metal ion in both neutral and basic media. The stoichiometry reaction between the metal (II) ion and synthesized ligand in molar ration of M: L (1:1) in both neutral and basic media. In neutral media forms the metal complexes of type of [M 2 (LH) 2 (H 2 O) ٤ Cl ٤ ] while in basic media forms type [M 2 (L) 2 (H 2 O) 6 Cl 2 ] (where M= Co(II), Ni(II), or Cu(II), LH=C 13 H 11 NO, L= C 13 H 10 NO) respectively. The infrared spectra of free ligand and all complexes reveal that the ligand has been coordinated to metal ion through the nitrogen of azomethine group and oxygen atom of phenol group in neutral media but in alkaline medium acts as mono basic. In all these complexes the metal ions are hexacoordinate with most probable octahedral structure. Introduction:Schiff bases are considered as a very important class of organic compounds, which have wide applications in many biological aspects [1]. Transition metal complexes of Schiff base are one of the most adaptable and thoroughly studied systems. These complexes have also application in clinical, analytical and industrial in addition to their important roles in catalysis and organic synthesis [2]. Studies of a new kind of chemotherapeutic Schiff bases are now attracting t...

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“…There are many studies investigating the anti-inflammatory, anticancer, analgesic, antioxidant and antimicrobial effects of Schiff base ligands. [1][2][3][4][5] These ligands and their metal complexes have many application fields such as coordination chemistry, industry, pharmacology, medicine, chemical and biological processes since they have donor atoms such as O, N, S. [6][7][8][9][10] Bibenzyl of isoquinoline alkaloids is an important component of some drugs, and widely used in the synthesis of products such as synthetic agents and opioid analgesics as pointed out elsewhere. 11,12 Examination of the theoretical properties of the ligands has recently attracted the attention of scientists.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this study was to investigate the synthesis and theoretical properties of Schiff base ligands derived from bibenzyl. The ligands were synthesized by Schiff base condensation method 8,9 of thiophene-2carbaldehyde and 4-methylthiophene-2-carbaldehyde with 4,4'-(ethane-1,2-diyl)dianiline, respectively. Ligand 1 has been synthesized in a slightly different way than our study, but its physical geometrical, optical and electronic properties have not been calculated.…”

Section: Introductionmentioning

confidence: 99%

EXPERIMENTAL AND THEORETICAL ANALYSIS OF N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(THIOPHEN-2-YL)METHANIMINE) AND N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(4-METHYLTHIOPHEN-2-YL)METHANIMINE) SCHIFF BASE LIGANDS

Uluçam

Yentürk

2019

J. Chil. Chem. Soc.

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N,N'-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(thiophen-2-yl)methanimine) and N,N'-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(4-methylthiophen-2-yl) methanimine) ligands are formed by diamine and two aromatic aldehyde using Schiff base condensation method. Ligands are characterised by fourier transform infrared spectroscopy (FT-IR), 1 Hand 13 C-nuclear magnetic resonance spectroscopy (1 Hand 13 C-NMR) and mass spectroscopy (LC ESI/MS) methods. Furthermore, geometric properties such as bond lenghts, bond angles, dihedral angles, electronic properties, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies are calculated by using Gaussian 09w program. Experimental and theoretical spectrum datas are compared.

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Vanadium complexes with quadridentate Schiff bases

Cited by 20 publications

References 25 publications

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Preparation and Study of Some New Schiff Base Complexes of Co(II), Ni(II) and Cu(II)

EXPERIMENTAL AND THEORETICAL ANALYSIS OF N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(THIOPHEN-2-YL)METHANIMINE) AND N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(4-METHYLTHIOPHEN-2-YL)METHANIMINE) SCHIFF BASE LIGANDS

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Vanadium complexes with quadridentate Schiff bases

Cited by 20 publications

References 25 publications

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Preparation and Study of Some New Schiff Base Complexes of Co(II), Ni(II) and Cu(II)

EXPERIMENTAL AND THEORETICAL ANALYSIS OF N,N&#8217;-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(THIOPHEN-2-YL)METHANIMINE) AND N,N&#8217;-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(4-METHYLTHIOPHEN-2-YL)METHANIMINE) SCHIFF BASE LIGANDS

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EXPERIMENTAL AND THEORETICAL ANALYSIS OF N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(THIOPHEN-2-YL)METHANIMINE) AND N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(4-METHYLTHIOPHEN-2-YL)METHANIMINE) SCHIFF BASE LIGANDS