Bismuth(III) Bis(N,N-diethyldithiocarbamato)alkylene Dithiophosphates: FAB⁺ Mass, Thermal Decomposition, and SEM Studies

Abstract

FAB⁺ mass, thermal decomposition, and scanning electron microscopy (SEM) studies have been carried out on the complexes [Bi{(C₂H₅)₂NCS₂}₂{S₂ POC (CH₃)₂C(CH₃)₂O}] and [Bi{(C₂H₅)₂NCS₂}₂{S₂{POCH₂C(C₂H₅)₂CH₂O}]. The structural composition, thermal properties, and microstructures of the complexes have been determined. FAB⁺ mass spectrometry coupled to thermal analysis allowed characterization of the structure, composition, and thermal properties of the complexes. In the FAB⁺ mass spectra, the base peak indicates a strong chelating tendency of dithiocarbamates as compared to the alkylene dithiophosphates, while the weak molecular ion peak indicates pyrolytic decomposition of the complex. Thermal studies indicate the formation of metal sulfide as a final decomposition product. In addition, SEM studies of the complexes show different types of topography and morphology of the complexes. Images obtained at various magnifications show the different texture of the complexes.

GRAPHICAL ABSTRACT

Keywords:

• FAB+ mass
• scanning electron microscopy
• TGA and DTA

Acknowledgements

Financial assistance from the University Grant Commission, New Delhi, is gratefully acknowledged. We also thank the Central Drug Research Institute (CDRI), Lucknow; CSMCRI, Bhavnagar; and UGC-DAE-CSR, Indore, for FAB+ mass spectrometric studies, thermal studies, and SEM studies, respectively.