Preparation, characterisation and thermal reactivity of transition metal complexes of hydrazine with citric acid

Yasodhai, S.; Sivakumar, T.; Govindarajan, S.

doi:10.1016/s0040-6031(99)00192-6

Cited by 46 publications

(23 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the pH range 1-2, two peaks of asymmetric carboxyl groups are evident for the Ti-CA resin (TC) spectra; one at 1724 and the other at 1635 cm -1 referent to as(COOH) and as(COO -), respectively. Symmetric stretching frequencies occurred at 1445 and 1389 cm -1 for the same carboxyl groups [31,32]. BCT resin spectra do not display a unionized carboxyl group in the region close to 1720 cm -1 , indicating that all carboxyl groups were ionized in ph ~8.5 [33].…”

Section: Characterization Of the Precursor Solutionmentioning

confidence: 90%

“…BCT resin spectra do not display a unionized carboxyl group in the region close to 1720 cm -1 , indicating that all carboxyl groups were ionized in ph ~8.5 [33]. In the BCT spectra, two bands belonging to asymmetric and symmetric stretching are attributed, according to Rajendran et al [31] and Yasodhai et al [32], to the presence of a mixed-metal CA complex in BCT, which creates different types of carboxyl groups. In all complexes, the carbonyl asymmetric and symmetric stretching frequencies were in the range of 1665-1565 cm -1 and 1445-1389 cm -1 , respectively.…”

Section: Characterization Of the Precursor Solutionmentioning

confidence: 91%

“…In all complexes, the carbonyl asymmetric and symmetric stretching frequencies were in the range of 1665-1565 cm -1 and 1445-1389 cm -1 , respectively. The difference between the asymmetric (νas) and symmetric (νs) COO stretching modes ((νas-νs)) of the coordinated carboxyl groups varied from 220 to 176 cm -1 , suggesting that the carboxyl groups present an unidentate coordination in these resins [31,32]. If the carboxyl groups were involved in bridging in the chelation of CA complex, the value for ν would be expected to be lower than (νas-νs) ~ 170 cm -1 [32].…”

Section: Characterization Of the Precursor Solutionmentioning

confidence: 99%

“…The difference between the asymmetric (νas) and symmetric (νs) COO stretching modes ((νas-νs)) of the coordinated carboxyl groups varied from 220 to 176 cm -1 , suggesting that the carboxyl groups present an unidentate coordination in these resins [31,32]. If the carboxyl groups were involved in bridging in the chelation of CA complex, the value for ν would be expected to be lower than (νas-νs) ~ 170 cm -1 [32]. In the region below 1000 cm -1 a broad band that was attributed to stretching of the bond M-O appears, where M is Ti, Ba or Ca [34].…”

Section: Characterization Of the Precursor Solutionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of Ba1-xCaxTiO3 by Complex Polymerization Method (CPM)

Motta¹,

Marques²,

Paskocimas³

et al. 2012

Polymerization

View full text Add to dashboard Cite

Synthesis of Ba1-xCaxTiO3 by Complex Polymerization Method (CPM) 275provokes degeneracy and destabilization in the localized states of the atoms acting as electron-hole pairs and supporting the broad PL band phenomena and electronic levels are fundamental to understanding the order-disorder process in the solid state. These optical properties exhibited by disordered BCT20 suggest that this material is a highly promising candidate for photoluminescent applications.

show abstract

Section: Characterization Of the Precursor Solutionmentioning

confidence: 90%

Section: Characterization Of the Precursor Solutionmentioning

confidence: 91%

Section: Characterization Of the Precursor Solutionmentioning

confidence: 99%

Section: Characterization Of the Precursor Solutionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Ba1-xCaxTiO3 by Complex Polymerization Method (CPM)

Motta¹,

Marques²,

Paskocimas³

et al. 2012

Polymerization

View full text Add to dashboard Cite

show abstract

“…Hydrazine is the simplest diamine and forms salt with mineral and carboxylic acids [1][2][3][4][5]. The monoprotonated hydrazine, the hydrazinium cation still retains a basic site and hence capable of coordination with various metal ions.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Analytical, IR Spectral, and Thermal Studies of Some New Hydrazinium Carboxylates

Manimekalai¹,

Sinduja²,

Kalimuthu³

2012

International Journal of Inorganic Chemistry

View full text Add to dashboard Cite

Hydrazinium salts of 2,4-dichlorophenylacetic acid, phenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, diphenylacetic acid, cinnamic acid, and picolinic and nicotinic acids have been prepared by accomplishing neutralization of aqueous hydrazine hydrate with the respective acids. Formation of these hydrazinium salts has been confirmed by analytical, IR spectral, and thermal studies. IR spectra of the salts register N-N stretching frequencies of N 2 H 5 + ion in the region 963-951 cm −1 and the frequencies of N 2 H 6 2+ ion in the region 1047-1026 cm −1 . Thermal decomposition studies show that the hydrazinium salts undergo melting followed by endothermic decomposition into carbon residue as the endproduct.

show abstract

Design, synthesis, characterization and antibacterial properties of copper(II) complexes with chromone‐derived compounds

Chohan

Iqbal

Aftab

2009

Applied Organom Chemis

View full text Add to dashboard Cite

A new series of six chromone-derived compounds and their Cu(II) complexes was synthesized and characterized by their physical, spectral and analytical data The elemental analysis data of the complexes agree well with the proposed composition of the compounds, which were found to be dimeric in nature with two hydrazine molecules bridging the two copper atoms through coordination. The ligands and their Cu(II) complexes were screened for their in-vitro antibacterial activity against four Gram-negative (Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Shigella flexneri) and two Gram-positive (Bacillus subtilis, Staphylococcus aureus) bacterial strains by the agar-well diffusion method. The ligands were found to exhibit either no or low to moderate activities against one or more of the bacterial species, whereas all the metal complexes exhibited moderate to high activities against different bacterial species. The ligands which were inactive before complexation turned active and less active ones became more active upon coordination with copper ions. Overall, the complexes 7-12 showed comparatively much higher activities than the ligands.

show abstract

Preparation, characterisation and thermal reactivity of transition metal complexes of hydrazine with citric acid

Cited by 46 publications

References 24 publications

Synthesis of Ba1-xCaxTiO3 by Complex Polymerization Method (CPM)

Synthesis of Ba1-xCaxTiO3 by Complex Polymerization Method (CPM)

Preparation, Analytical, IR Spectral, and Thermal Studies of Some New Hydrazinium Carboxylates

Design, synthesis, characterization and antibacterial properties of copper(II) complexes with chromone‐derived compounds

Contact Info

Product

Resources

About