INFRARED SPECTRA OF THIOSACCHARINATES OF CADMIUM AND LEAD COMPARISON WITH THE ANALOGOUS METAL SACCHARINATES

Gligor Jovanovski, Adnan Kahil, Orhideja Grupče

Abstract


A b s t r a c t: The Fourier transform (FT) infrared spectra of thiosaccharinates of cadmium and lead in the 4000–400 cm–1 region were studied. Although the observed resemblance between the spectra recorded in KBr pellets suggests a possible similarity between their structures as well, the powder X-ray diagrams show that these two compounds are not isomorphous. The presence of broad and intense bands in the region of the HOH stretchings shows that thiosaccharinate of cadmium is a crystalline hydrate and the spectral picture in the region of the O-D stretchings of the isotopically isolated HOD molecules in the partially deuterated analogue indicates that present in its structure are at least two types of crystallographically different water molecules involved in the formation of weak hydrogen bonds. The room temperature (RT) spectrum of lead thiosaccharinate in the region of the ν(HOH) modes differs significantly from the spectrum recorded at the boiling temperature of liquid nitrogen (LNT), which may perhaps be interpreted as an indication that a phase transition is taking place on lowering the temperature. The spectrum of lead thiosaccharinate was recorded in a Nujol mull as well. While the KBr and Nujol spectra are essentially identical in the region below 1600 cm–1, no bands are observed in the HOH stretching region of the mull spectra. In fact, it was shown that the appearance of the spectra of lead thiosaccharinates depends on the emulsion preparation rate. A comparison of the spectral characteristics of the thiosaccharinates of cadmium and lead with those of the corresponding saccharinates (their crystal structures are known) was made, special attention being paid to the analysis of the SO2 stretching region in the saccharinate and thiosaccharinate compounds.


Keywords


cadmium; lead; thiosaccharinates; saccharinates; IR spectra

Full Text:

PDF

References


O. Grupče, M. Penavić, G. Jovanovski, J. Chem. Crystallogr., 24, 581 (1994).

M. Penavić., G. Jovanovski, O. Grupče, Acta Crystallogr., C46 , 2341 (1990).

M. Penavić, O. Grupče, G. Jovanovski, Acta Crystallogr., C47, 1821 (1991).

O. Grupče, G. Jovanovski, B. Šoptrajanov, J. Mol. Struct., 267, 197 (1992).

O. Grupče, G. Jovanovski, B. Šoptrajanov, J. Mol. Struct., 293, 113 (1993).

O. Grupče, G. Jovanovski, Anal. Labor., 7, 9 (1998).

A. Kahil, G. Jovanovski, O. Grupče, Bull. Chem. Technol. Macedonia, 19, 9 (2000).

B. Kamenar, G. Jovanovski, Cryst. Struct. Comm., 11, 257 (1982).

S. Z. Haider, K. M. A. Malik, S. Das, Acta Crystallogr., C40, 1147 (1984).

G. Jovanovski, A. Hergold-Brundić, B. Kamenar, Acta Crystallogr., C44, 63 (1988).

G. Jovanovski, B. Šoptrajanov, J. Mol. Struct., 143, 159 (1986).

S. Tančeva, G. Jovanovski. B. Šoptrajanov, Spectrosc. Lett., 25, 927 (1992).

G. Jovanovski, S. Tančeva. B. Šoptrajanov, Spectrosc. Lett., 28, 1095 (1995).

Y. I. Binev, C. T. Petkov, Lj. Pejov, Spectrochim. Acta A59, 1949 (2000).

Y. Okaya, Acta Crustallogr., B25, 2257 (1969).




DOI: http://dx.doi.org/10.20903/csnmbs.masa.2006.27.1-2.10

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.



Contact details

Bul. Krste Misirkov br.2
1000 Skopje, Republic of Macedonia
Tel. ++389 2 3235-400
cell:++389 71 385-106
mail: manu@manu.edu.mk
About the journal

CSNMBS is a part of the MASA Contribution series. Published by the Section Natural, Mathematical and Biotechnical Sciences.
About this site

Maintained by the Researh center for Materials and Enviroment - MANU/MASA.
Site (including the theme) set, adapted by MASA - CSIT.