99-22-9Relevant articles and documents
Steric influence on hapto interactions in supramolecularly linked thallium dithiocarbamates
Ramalingam, Kuppukkannu,Rizzoli, Corrado,Alexander, Nagarajan
, p. 1329 - 1334 (2013)
Spectral and structural characterization of diallyl and dibenzyl dithiocarbamates of thallium(I) indicated increased thalliocarbon hapto interactions in dibenzyl dithiocarbamate due to increased steric effects. Proton magnetic resonance spectra of the compounds showed that the protons in the vicinity of the thioureide nitrogen are highly deshielded and the corresponding 13C spectra showed large chemical shifts of the thioureide carbons due to decreased electron density. Cyclic voltammetry and bond valence calculations established that the oxidation number of thallium was +1. The Tl-S bond distances in both compounds did not vary significantly. η1-Tl···C(S2) supramolecular interactions were observed in both compounds. A nonclassical S···H bond (2.841 A) was also observed in the dibenzyl compound. Aside from the two noncovalent interactions mentioned, additional hapto interactions such as Tl(1)S2η1Cη 1Cη2C2 and Tl(2)S2η 1Cη3C3 were observed. Both compounds formed polymeric chains through hapto interactions.
Method for preparing tetraalkyl thiuram disulfide through photocatalytic oxidation
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Paragraph 0095; 0097; 0100; 0102; 0104; 0106; 0108; 0110, (2021/02/13)
The invention relates to a method for preparing tetraalkyl thiuram disulfide by photocatalytic oxidation. The method comprises the following steps: carrying out mixed reaction on secondary amine, carbon disulfide and a catalyst in a medium to generate an intermediate product; and carrying out catalytic oxidation reaction on the intermediate product under illumination to obtain tetraalkyl thiuram disulfide. According to the invention, the method is high in reaction speed and mild in condition, and energy conservation and efficiency improvement are achieved; the used medium and catalyst can be recycled, so that the resource utilization rate is improved; and the method does not produce inorganic salt by-products, and the product has high yield and high purity.
Synthesis and crystal structures of bis(dibenzyl dithiocarbamato)Cu(II) and Ag(I) complexes: Precursors for Cu1.8S and Ag2S nano-photocatalysts
Ajibade, Peter A.,Botha, Nandipha L.,Oluwalana, Abimbola E.,Omondi, Bernard,Sikakane, Berlinda M.
, (2020/07/06)
We report the synthesis and crystal structures of bis(dibenzyl dithiocarbamato) copper(II) and silver(I) complexes and their use as precursors to prepare Cu1.8S and Ag2S nanoparticles. Single crystal analysis of bis(dibenzyl dithiocarbamato)Cu(II) complex consist of a monomeric entity where the two dibenzyl dithiocarbamate ligands form a distorted square planar geometry around the Cu(II) ion. The bis(dibenzyl dithiocarbamato)Ag(I) formed hexameric coordination complex consisting of two distorted hexagonal Ag3S3 rings. The complexes were thermolysed at 220 °C to prepare copper sulphide and silver sulphide nanoparticles. Powder X-ray diffraction (p-XRD) patterns of the copper sulphide nanoparticles were indexed to digenite Cu1.8S, while silver sulphide nanoparticles were confirmed to be acathinite Ag2S. High-resolution transmission electron microscopy (HRTEM) images showed Ag2S nanoparticles with particle size in the range 11.4–27.4 nm while Cu1.8S nanoparticles are semi-spherical in shape with slightly agglomerated particles in the range 6.9–24.0 nm. The as-prepared nanoparticles were used as nano-photocatalysts for the degradation of methylene blue dye (MB) under UV light irradiation with degradation efficiency of 42.52% and 48.39% for Cu1.8S and Ag2S nanoparticles respectively.
