Thermal behavior of the saccharinates of K+, Na+, Rb+, Cs+ and NH4 +: Structural inferences

Pance Naumov, Gligor Jovanovski, Sabina Abbrent, Lars Erik Tergenius

Research output: Contribution to journalArticle

Abstract

Four alkali saccharinates: K3(sac)3·2H2O (KSac, ’sac’ denotes saccharinato ion, C7H4NO3S-), triclinic Na3(sac)3·2H2O (NaSac), Rb2(sac)2·H2O (RbSac), Cs(Hsac)(sac)·H2O (CsSac)) and ammonium saccharinate (AmmSac) were synthesized and their thermal decompositions were investigated in the temperature interval 293-873 K by means of thermogravimetric methods (TG, DTG, DTA) in static atmosphere of helium and by DSC in a flow of nitrogen. The thermal and the infrared spectroscopic data of NaSac and AmmSac were correlated with the corresponding structural data, whereas data for KSac, RbSac and CsSac were used to make inferences about their crystal structures. Excluding the anhydrous AmmSac, all compounds were dehydrated prior to the decomposition of the deprotonated saccharinato species. The decomposition temperature of the saccharinato ion is about 130 K higher than the one of pure saccharin. There are two types of water molecules in molar ratio 2:1 in KSac, the overall structure being similar to but not identical with that of NaSac. Coordination properties rather than the hydrogen bonding are responsible for the stronger bonding of the water in the former salt. The existence of molecular saccharin in CsSac is confirmed.

Original languageEnglish (US)
Pages (from-to)123-130
Number of pages8
JournalThermochimica Acta
Volume359
Issue number2
DOIs
StatePublished - Aug 28 2000

Fingerprint

Ammonium Compounds
inference
Saccharin
Decomposition
decomposition
Ions
Differential thermal analysis
water
thermal decomposition
Helium
Water
alkalies
Hydrogen bonds
thermal analysis
ions
Pyrolysis
Crystal structure
helium
Alkalies
Salts

Keywords

  • Ammonium
  • Saccharinates
  • Structure
  • Thermal decomposition

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Thermal behavior of the saccharinates of K+, Na+, Rb+, Cs+ and NH4 + : Structural inferences. / Naumov, Pance; Jovanovski, Gligor; Abbrent, Sabina; Tergenius, Lars Erik.

In: Thermochimica Acta, Vol. 359, No. 2, 28.08.2000, p. 123-130.

Research output: Contribution to journalArticle

Naumov, Pance ; Jovanovski, Gligor ; Abbrent, Sabina ; Tergenius, Lars Erik. / Thermal behavior of the saccharinates of K+, Na+, Rb+, Cs+ and NH4 + : Structural inferences. In: Thermochimica Acta. 2000 ; Vol. 359, No. 2. pp. 123-130.
@article{6fee4c8e96ac4801af0b0e6b3ad093aa,
title = "Thermal behavior of the saccharinates of K+, Na+, Rb+, Cs+ and NH4 +: Structural inferences",
abstract = "Four alkali saccharinates: K3(sac)3·2H2O (KSac, ’sac’ denotes saccharinato ion, C7H4NO3S-), triclinic Na3(sac)3·2H2O (NaSac), Rb2(sac)2·H2O (RbSac), Cs(Hsac)(sac)·H2O (CsSac)) and ammonium saccharinate (AmmSac) were synthesized and their thermal decompositions were investigated in the temperature interval 293-873 K by means of thermogravimetric methods (TG, DTG, DTA) in static atmosphere of helium and by DSC in a flow of nitrogen. The thermal and the infrared spectroscopic data of NaSac and AmmSac were correlated with the corresponding structural data, whereas data for KSac, RbSac and CsSac were used to make inferences about their crystal structures. Excluding the anhydrous AmmSac, all compounds were dehydrated prior to the decomposition of the deprotonated saccharinato species. The decomposition temperature of the saccharinato ion is about 130 K higher than the one of pure saccharin. There are two types of water molecules in molar ratio 2:1 in KSac, the overall structure being similar to but not identical with that of NaSac. Coordination properties rather than the hydrogen bonding are responsible for the stronger bonding of the water in the former salt. The existence of molecular saccharin in CsSac is confirmed.",
keywords = "Ammonium, Saccharinates, Structure, Thermal decomposition",
author = "Pance Naumov and Gligor Jovanovski and Sabina Abbrent and Tergenius, {Lars Erik}",
year = "2000",
month = "8",
day = "28",
doi = "10.1016/S0040-6031(00)00519-0",
language = "English (US)",
volume = "359",
pages = "123--130",
journal = "Thermochimica Acta",
issn = "0040-6031",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Thermal behavior of the saccharinates of K+, Na+, Rb+, Cs+ and NH4 +

T2 - Structural inferences

AU - Naumov, Pance

AU - Jovanovski, Gligor

AU - Abbrent, Sabina

AU - Tergenius, Lars Erik

PY - 2000/8/28

Y1 - 2000/8/28

N2 - Four alkali saccharinates: K3(sac)3·2H2O (KSac, ’sac’ denotes saccharinato ion, C7H4NO3S-), triclinic Na3(sac)3·2H2O (NaSac), Rb2(sac)2·H2O (RbSac), Cs(Hsac)(sac)·H2O (CsSac)) and ammonium saccharinate (AmmSac) were synthesized and their thermal decompositions were investigated in the temperature interval 293-873 K by means of thermogravimetric methods (TG, DTG, DTA) in static atmosphere of helium and by DSC in a flow of nitrogen. The thermal and the infrared spectroscopic data of NaSac and AmmSac were correlated with the corresponding structural data, whereas data for KSac, RbSac and CsSac were used to make inferences about their crystal structures. Excluding the anhydrous AmmSac, all compounds were dehydrated prior to the decomposition of the deprotonated saccharinato species. The decomposition temperature of the saccharinato ion is about 130 K higher than the one of pure saccharin. There are two types of water molecules in molar ratio 2:1 in KSac, the overall structure being similar to but not identical with that of NaSac. Coordination properties rather than the hydrogen bonding are responsible for the stronger bonding of the water in the former salt. The existence of molecular saccharin in CsSac is confirmed.

AB - Four alkali saccharinates: K3(sac)3·2H2O (KSac, ’sac’ denotes saccharinato ion, C7H4NO3S-), triclinic Na3(sac)3·2H2O (NaSac), Rb2(sac)2·H2O (RbSac), Cs(Hsac)(sac)·H2O (CsSac)) and ammonium saccharinate (AmmSac) were synthesized and their thermal decompositions were investigated in the temperature interval 293-873 K by means of thermogravimetric methods (TG, DTG, DTA) in static atmosphere of helium and by DSC in a flow of nitrogen. The thermal and the infrared spectroscopic data of NaSac and AmmSac were correlated with the corresponding structural data, whereas data for KSac, RbSac and CsSac were used to make inferences about their crystal structures. Excluding the anhydrous AmmSac, all compounds were dehydrated prior to the decomposition of the deprotonated saccharinato species. The decomposition temperature of the saccharinato ion is about 130 K higher than the one of pure saccharin. There are two types of water molecules in molar ratio 2:1 in KSac, the overall structure being similar to but not identical with that of NaSac. Coordination properties rather than the hydrogen bonding are responsible for the stronger bonding of the water in the former salt. The existence of molecular saccharin in CsSac is confirmed.

KW - Ammonium

KW - Saccharinates

KW - Structure

KW - Thermal decomposition

UR - http://www.scopus.com/inward/record.url?scp=0034726506&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034726506&partnerID=8YFLogxK

U2 - 10.1016/S0040-6031(00)00519-0

DO - 10.1016/S0040-6031(00)00519-0

M3 - Article

AN - SCOPUS:0034726506

VL - 359

SP - 123

EP - 130

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

IS - 2

ER -