Limits...
Synthesis and spectroscopic properties of new bis-tetrazoles.

Pazik A, Skwierawska A - J Incl Phenom Macrocycl Chem (2012)

Bottom Line: Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described.The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu(2+) ion.The structure of ligand 2 has been deduced by X-ray crystallography.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Technology, Chemical Faculty, Gdansk University of Technology, 80-233 Gdańsk, Poland.

ABSTRACT
Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described. The complexing properties of these compounds towards metal cations (Fe(2+), Cu(2+), Zn(2+), Co(2+), Ni(2+)) were investigated by absorption and infrared spectroscopy. The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu(2+) ion. Changes in UV-Vis absorption spectra and IR spectra of compound 6 under various concentrations of Cu(2+) ion in methanol suggest formation of very unstable complex. The structure of ligand 2 has been deduced by X-ray crystallography.

No MeSH data available.


Related in: MedlinePlus

MIR spectra (film) of compound 6 (upper spectrum) and its complex
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3824287&req=5

Fig8: MIR spectra (film) of compound 6 (upper spectrum) and its complex

Mentions: Figure 7 shows the characteristic down-shifts of the tetrazoles C–H stretching vibration at 3129 cm−1 copper(II) coordination. The symmetry of ligand is observed in IR spectroscopy with one large signal deriving from two tetrazoles C–H stretching vibration. A reference spectrum was taken from pure ligand. Figure 8 compares the C–H tetrazole stretching vibrations of pure ligand with the vibrations observed of the new complex in MIR spectroscopy. Complexation can be observed in the loss of stretching vibration at 3129 and the new signals can be found below 3000 cm−1. The occurrences of the peaks of the pure ligand at 3065 cm−1 prove incomplete complexation.Fig. 8


Synthesis and spectroscopic properties of new bis-tetrazoles.

Pazik A, Skwierawska A - J Incl Phenom Macrocycl Chem (2012)

MIR spectra (film) of compound 6 (upper spectrum) and its complex
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3824287&req=5

Fig8: MIR spectra (film) of compound 6 (upper spectrum) and its complex
Mentions: Figure 7 shows the characteristic down-shifts of the tetrazoles C–H stretching vibration at 3129 cm−1 copper(II) coordination. The symmetry of ligand is observed in IR spectroscopy with one large signal deriving from two tetrazoles C–H stretching vibration. A reference spectrum was taken from pure ligand. Figure 8 compares the C–H tetrazole stretching vibrations of pure ligand with the vibrations observed of the new complex in MIR spectroscopy. Complexation can be observed in the loss of stretching vibration at 3129 and the new signals can be found below 3000 cm−1. The occurrences of the peaks of the pure ligand at 3065 cm−1 prove incomplete complexation.Fig. 8

Bottom Line: Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described.The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu(2+) ion.The structure of ligand 2 has been deduced by X-ray crystallography.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Technology, Chemical Faculty, Gdansk University of Technology, 80-233 Gdańsk, Poland.

ABSTRACT
Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described. The complexing properties of these compounds towards metal cations (Fe(2+), Cu(2+), Zn(2+), Co(2+), Ni(2+)) were investigated by absorption and infrared spectroscopy. The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu(2+) ion. Changes in UV-Vis absorption spectra and IR spectra of compound 6 under various concentrations of Cu(2+) ion in methanol suggest formation of very unstable complex. The structure of ligand 2 has been deduced by X-ray crystallography.

No MeSH data available.


Related in: MedlinePlus