COMPLEX COMPOUNDS OF LANTANOIDS WITH 4 - [(2,4-DIMETOXYBENZYL) AMINO] BENZOIC ACID.

The synthesis of complex compounds of 4 - [(2,4-dimethoxybenzyl) amino] benzoic acid (HL) with ions of samarium (III), europium (III), terbium (III), gadolinium (III) and dysprosium (III). According to the data of elemental analysis and thermogravimetry, the obtained complexes are hydrates of the composition LnL3 · nH2O, where n = 0-2. The area of their thermal stability is in the range from 100 ° С to 150 ° С. Electronic and infrared absorption spectra of the ligand and complexes with rare-earth metal ions have been measured. According to the IR spectra, the coordination of the ligand with the metal ion occurs at the carboxyl group. The carboxyl group is bidentate coordinated. To excite luminescence, a line of a mercury lamp with a wavelength of 248 nm was used. The highest luminescence intensity is observed for the coordination compounds Eu3 +, Tb3 +, Sm3 +, and Dy3 +.

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SYNTHESIS, STRUCTURE AND PROPERTIES OF COMPLEX COMPOUNDS OF ANTHANOIDS WITH 4 - [(3,4-DIMETOXYBENZYL) AMINO] BENZOIC ACID

EurasianUnionScientists ◽

10.31618/esu.2413-9335.2020.6.76.940 ◽

2020 ◽

Vol 6 (7(76)) ◽

pp. 28-31

Author(s):

Medina Humaidovna Shamsutdinova ◽

Zara Sultanovna Ilkhaeva ◽

Alet Ilyasovna Khasaeva

Keyword(s):

Benzoic Acid ◽

Coordination Compounds ◽

Metal Ion ◽

Earth Metal ◽

Complex Compounds ◽

Carboxyl Group ◽

Structure And Properties ◽

Mercury Lamp ◽

Infrared Absorption Spectra ◽

Amino Benzoic Acid

The synthesis of complex compounds of 4 - [(3,4-dimethoxybenzyl) amino] benzoic acid (HL) with ions of samarium (III), europium (III), terbium (III), gadolinium (III) and dysprosium (III). According to the data of elemental analysis and thermogravimetry, the obtained complexes are hydrates of the composition LnL3 · nH2O, where n = 0-2. The area of their thermal stability is in the range from 100 ° С to 150 ° С. Electronic and infrared absorption spectra of the ligand and complexes with rare-earth metal ions have been measured. According to the IR spectra, the coordination of the ligand with the metal ion occurs at the carboxyl group. The carboxyl group is bidentate coordinated. To excite luminescence, a line of a mercury lamp with a wavelength of 248 nm was used. The highest luminescence intensity is observed for the coordination compounds Eu3 +, Tb3 +, Sm3 +, and Dy3 +.

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SYNTHESIS, STRUCTUREAND PROPERTIES OF COMPLEX COMPOUNDS OF LANTANOIDES WITH 2-(METHYLAMINO) BENZOIC ACID

National Association of Scientists ◽

10.31618/nas.2413-5291.2020.3.55.224 ◽

2020 ◽

Vol 3 (28(55)) ◽

pp. 46-49

Author(s):

M.H. Shamsutdinova ◽

N.R. Tashligov ◽

L.E. Ilyasova

Keyword(s):

Thermal Stability ◽

Rare Earth ◽

Benzoic Acid ◽

Rare Earth Metal ◽

Coordination Compounds ◽

Metal Ion ◽

Earth Metal ◽

Complex Compounds ◽

Carboxyl Group ◽

Stability Ranges

Synthesis of complex compounds of 2-(methylamino) benzoic acid (L) with ions of samarium (III), europium (III), terbium (III), gadolinium (III) and dysprosium (III). According to elemental analysis and thermogravimetry, the complexes obtained are hydrates of the composition LnL3 • nH2O, where n = 1-5. The area of their thermal stability ranges from 100 ° C to 240 ° C. Electronic and infrared absorptionspectra of the ligand and complexeswith rare-earth metal ions were measured. According to the IR spectra, coordination of the ligand with the metal ion is carried out on the carboxyl group. The carboxyl group is coordinated bidentately. A mercury lampwith a wavelength of 248 nm was used to excite the luminescence. The highest luminescence intensity is observed for the coordination compounds Eu3 +, Tb3 +, and Dy3 +

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4-[(2-Carboxyethyl)amino]benzoic acid monohydrate

Acta Crystallographica Section E Structure Reports Online ◽

10.1107/s1600536812009518 ◽

2012 ◽

Vol 68 (4) ◽

pp. o1098-o1098 ◽

Cited By ~ 1

Author(s):

Chunman Jia ◽

Shangwen Chen ◽

Wenbing Yuan

Keyword(s):

Hydrogen Bonds ◽

Benzoic Acid ◽

Title Compound ◽

Organic Molecule ◽

Organic Molecules ◽

Carboxyl Groups ◽

Water Molecules ◽

Carboxyl Group ◽

Compound C ◽

Amino Benzoic Acid

In the title compound, C10H11NO4·H2O, the carboxyl group is twisted at a dihedral angle of 6.1 (3)° with respect to the benzene ring. In the crystal, the organic molecules are linked by pairs of O—H...O hydrogen bonds involving both carboxyl groups, forming zigzag chains propagating along theb-axis direction. The water molecules form [100] chains linked by O—H...O hydrogen bonds. The organic molecule and water chains are cross-linked by N—H...Owaterand Owater—H...O hydrogen bonds, generating (001) sheets.

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A series of Zn(ii) and Cd(ii) coordination compounds based on 4-(4H-1,2,4-triazol-4-yl)benzoic acid: synthesis, structure and photoluminescence properties

CrystEngComm ◽

10.1039/c5ce01815c ◽

2016 ◽

Vol 18 (1) ◽

pp. 130-142 ◽

Cited By ~ 13

Author(s):

Li-Bo Yang ◽

Hong-Can Wang ◽

Xiao-Dan Fang ◽

Si-Jin Chen ◽

Quan-Qing Xu ◽

...

Keyword(s):

Thermal Stability ◽

Benzoic Acid ◽

Coordination Compounds ◽

Acid Synthesis ◽

Photoluminescence Properties ◽

Bifunctional Ligand

Seven d10 coordination compounds based on a triazolate–carboxylate bifunctional ligand have been synthesized and structurally characterized. Their thermal stability and photoluminescence properties were also investigated.

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Synthesis, characterization, thermal stability, conductivity and band gap of oligo-4-[(2-hydroxybenzylidene)amino]benzoic acid

Synthetic Metals ◽

10.1016/j.synthmet.2006.04.008 ◽

2006 ◽

Vol 156 (9-10) ◽

pp. 736-744 ◽

Cited By ~ 35

Author(s):

İsmet Kaya ◽

Ali Bilici

Keyword(s):

Thermal Stability ◽

Benzoic Acid ◽

Band Gap ◽

Amino Benzoic Acid

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Studies on complex compounds. V. Coordination compounds of mercury and biologically active amines

Canadian Journal of Chemistry ◽

10.1139/v68-442 ◽

1968 ◽

Vol 46 (16) ◽

pp. 2685-2691 ◽

Cited By ~ 3

Author(s):

C. H. Misra ◽

Surendra S. Parmar ◽

S. N. Shukla

Keyword(s):

Absorption Spectra ◽

Coordination Compounds ◽

Complex Compounds ◽

Biologically Active ◽

Mercury Complexes ◽

Infrared Absorption Spectra ◽

The Difference ◽

Methyl Amphetamine

Five mercury complexes were synthesized by condensation of mercuric chloride with different biologically active amines. In the present study D-amphetamine, L-amphetamine, DL-amphetamine, methyl-amphetamine, ephedrine, and tyramine were used where a stereoisomeric effect was observed during the formation of the mercury complexes. The complex compound synthesized from DL-amphetamine was found to be a mixture of the mercury complexes of D-amphetamine and L-amphetamine, and the difference in their solubilities was utilized for their separation. The estimation of the carbon, hydrogen, and nitrogen content, the determination of the amount of chlorine and mercury, and measurements of the infrared absorption spectra at 700–3500 cm−1 indicated the ratio of 2:1 for amine to mercury in these coordination compounds. Further characterization of these mercury complexes was done by ultraviolet absorption spectra and conductance measurements.

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Hydrogenation of benzoic acid derivatives over Pt/TiO2 under mild conditions

Communications Chemistry ◽

10.1038/s42004-021-00489-z ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Miao Guo ◽

Xiangtao Kong ◽

Chunzhi Li ◽

Qihua Yang

Keyword(s):

Electron Transfer ◽

Benzoic Acid ◽

High Efficiency ◽

Carboxyl Groups ◽

Carboxyl Group ◽

Benzoic Acids ◽

Catalyst Poisoning ◽

Benzoic Acid Derivatives ◽

Mild Conditions ◽

Transfer Direction

AbstractHydrogenation of benzoic acid (BA) to cyclohexanecarboxylic acid (CCA) has important industrial and academic significance, however, the electron deficient aromatic ring and catalyst poisoning by carboxyl groups make BA hydrogenation a challenging transformation. Herein, we report that Pt/TiO2 is very effective for BA hydrogenation with, to our knowledge, a record TOF of 4490 h−1 at 80 °C and 50 bar H2, one order higher than previously reported results. Pt/TiO2 catalysts with electron-deficient and electron-enriched Pt sites are obtained by modifying the electron transfer direction between Pt and TiO2. Electron-deficient Pt sites interact with BA more strongly than electron-rich Pt sites, helping the dissociated H of the carboxyl group to participate in BA hydrogenation, thus enhancing its activity. The wide substrate scope, including bi- and tri-benzoic acids, further demonstrates the high efficiency of Pt/TiO2 for hydrogenation of BA derivatives.

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