Infrared spectra of amino acids and their metal complexes. II.Geometrical isomerism in bis(amino acidato)copper(II) complexes

Herlinger, Albert W.; Wenhold, Sandra L.; Long, Thomas Veach

doi:10.1021/ja00725a015

Cited by 138 publications

(74 citation statements)

References 11 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The NH 2 deformation mode in both compounds was observed as a sharp band at 1580 cm-], located next to the intense stretching mode ~O of the ---C.,.,o-group at 1600 cm-1. Other characteristic bands of the infrared spectra were found for both complexes in accordance with references [6,7].…”

Section: Resultssupporting

confidence: 89%

Thermal decomposition of bis-(DL-valinato)copper(II) and bis-(DL-methioninato)copper(II)

Gili

Zarza

1986

Journal of Thermal Analysis

View full text Add to dashboard Cite

A kinetic study of the thermal decomposition of the complexes bis-(DL-valinato)copper(II) and bis-(DL-methioninato)copper(ll) was carried out using thermogravimetry in a dynamic regime, following the theoretical model of ~ttava and including the equation used by Johnson 1 and Gallagher: ---1 = kt. Kinetic parameters were calculated and are compared with those obtained previously for the complex bis-(L-tryptophanato)copper(! I). The sequence of thermal stability found is:Little has been published till now on the solid ~solid + gas reactions of the bis-(aminoacidato)Cu(II) complexes. Olafson and Byran [1] studied the thermal decomposition of some bis-(aminoacidato)Cu(II) complexes by differential scanning calorimetry, and Gili and de la Fuente [2] described the thermal decomposition of the complex bis-(L-tryptophanato)copper(II) using thermogravimetry.In this work we report for the first time a kinetic study of the thermal decomposition in the solid phase of the complexes bis-(DL-valinato)-copper(II) and bis-(DL-methioninato)copper(II) (abbreviated Cu(DL-Val)2 and Cu(DLMet)2, respectively). This study has been carried out using thermogravimetry in a dynamic regime following the theoretical model of gatava [3] and including the

show abstract

Section: Resultssupporting

confidence: 89%

Thermal decomposition of bis-(DL-valinato)copper(II) and bis-(DL-methioninato)copper(II)

Gili

Zarza

1986

Journal of Thermal Analysis

View full text Add to dashboard Cite

show abstract

“…The bands at 1730 and 3040 cm -1 do not appear in the IR spectrum of K 3 NTA where there is a broad band at 1650-1600 cm -1 and another one at 1420 cm -1 . The fact that the band at ~ 1430 cm -1 is present in the spectra of the three compounds and which was previously assigned to the symmetric stretching frequency of the COO- [9] suggests that H 3 NTA is present in the zwitterion form. in the spectra of H 3 NTA and H 2 KNTA justifies its previous assignment to the undissociated -COOH stretching vibration [10].…”

Section: Resultsmentioning

confidence: 61%

Studies On Some Acid Divalent-Metal Nitrilotriacetate Complexes

et al. 2000

View full text Add to dashboard Cite

show abstract

“…5. The IR spectra of the neat metal complexes were analyzed in comparison to that of their corresponding free ligands and crosschecked with the literature data [22][23][24]. The IR spectra of the complexes show changes in the positions and the profiles of some bands, as compared to those of the free amino acid ligands ( Table 1).…”

Section: Resultsmentioning

confidence: 99%

Single-site Biomimetic Amino Acid Complexes for the Benign Oxidation of Hydrocarbons and Alcohols

Dzierzak

Lefenfeld²,

Raja

2009

Top Catal

View full text Add to dashboard Cite

Zeolite encapsulated amino acid complexes such as Fe-proline, Fe-histidine and Cu-valine have shown significant promise in the selective oxidation of hydrocarbons such as cyclohexane and benzylic alcohols. This novel encapsulation procedure, which involves building a zeolite (host) around a pre-formed and structurally defined amino acid complex (guest), results in the generation of isolated single-sites for catalytic oxidations. IR and UV-Vis techniques were used for structure determination as well as establishing the integrity of the synthesised complexes. Preliminary results indicate that complexes were formed by coordination to the nitrogen atom of the amino group and the oxygen atom of the carboxylate group to the metal. The hydrophobic/hydrophilic nature of the zeolite, coupled with the high activity of the neat complex, generates highly active and selective single-site heterogeneous catalysts for the production of cyclohexanone, an important precursor to the production of commodity chemicals such as adipic acid and e-caprolactam.

show abstract

Infrared spectra of amino acids and their metal complexes. II.Geometrical isomerism in bis(amino acidato)copper(II) complexes

Cited by 138 publications

References 11 publications

Thermal decomposition of bis-(DL-valinato)copper(II) and bis-(DL-methioninato)copper(II)

Thermal decomposition of bis-(DL-valinato)copper(II) and bis-(DL-methioninato)copper(II)

Studies On Some Acid Divalent-Metal Nitrilotriacetate Complexes

Single-site Biomimetic Amino Acid Complexes for the Benign Oxidation of Hydrocarbons and Alcohols

Contact Info

Product

Resources

About