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JournalISSN: 0037-9646

Bulletin des Sociétés Chimiques Belges 

Wiley
About: Bulletin des Sociétés Chimiques Belges is an academic journal. The journal publishes majorly in the area(s): Catalysis & Ring (chemistry). It has an ISSN identifier of 0037-9646. Over the lifetime, 4375 publications have been published receiving 26846 citations. The journal is also known as: Bulletin des Societes Chimiques Belges.


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Journal ArticleDOI
TL;DR: In this paper, the 13C NMR data of the thiocarbonyls of all thioketones are recorded and a function describing the relation between the chemical shifts of CS and CO is found: δCS1.57 δCO=71.45
Abstract: Substituted benzophenones, 2-benzoylthiophene, 3-benzoylpyridine, dicyclopropyl ketone, and camphor are converted into the corresponding thioketones after reaction with the dimer of p-methoxyphenylthionophosphine sulfide, 1. Except for the pyridine derivatives (2- and 4-benzoylpyridines, respectively, gave no thioketones) very high yields are found. Under the same conditions dibenzylketone gave 1,3-diphenylpropene-2-thiol and 1,9-benzanthr-10-one yielded the dimer of 1,9-benzanthr-10-thione. Aromatic thioketones are also obtained by reacting gem-dichlorides with 2-methyl-2-propane-thiol in the presence of catalytic amounts of CF3COOH (or AlCl3). A mechanism is suggested based on kinetic measurements. 13C NMR data of the thiocarbonyls of all thioketones are recorded and a function describing the relation between the chemical shifts of CS and CO is found: δCS1.57 δCO=71.45

320 citations

Journal ArticleDOI
TL;DR: In this article, the thiation properties of the dimer of p-methoxyphenylthionophosphine sulfide were investigated by performing reactions with a representative series of aliphatic and aromatic primary, secondary, and tertiary carboxamides in the temperature range 80-100 °C using HMPA as solvent.
Abstract: The thiation properties of the dimer of p-methoxyphenylthionophosphine sulfide, 1, has been investigated by performing reactions with a representative series of aliphatic and aromatic primary, secondary, and tertiary carboxamides in the temperature range 80-100 °C using HMPA as solvent. This new method seems to be superior to all others as in most cases quantitative yields are found. Salicylanilide, when reacted with 1, in HMPA, yields salicylthioanilide and a new type of phosphorus heterocycle, 3, whose structure has been determined by NMR-and X-ray analyses. 13C NMR data are tabulated for a series of thioamide carbons.

263 citations

Journal ArticleDOI
TL;DR: In this article, the synthesis and mechanistic aspects of 1,4-Diketopyrrolo[3,4c]pyrroles (DPP) are discussed.
Abstract: Syntheses and mechanistic aspects of formation of 1,4-Diketopyrrolo[3,4-c]pyrroles (DPP) are discussed. The chemical reactivity of this novel class of heterocycles is illustrated by specific electrophilic aromatic and N-substitution reactions, as well as by nucleophilic transformations of the bicyclic lactam carbonyl group. X-ray structural analysis of the diphenyl-DPP molecule reveals significant intermolecular hydrogen bonding and π-π interactions in the solid state.

158 citations

Journal ArticleDOI
TL;DR: In this article, the intrinsic structural, stereochemical and thermodynamic features of metal surfaces vis a vis those of discrete metal clusters are analyzed and compared for chemisorption and heterogeneous catalysis.
Abstract: An analysis of the intrinsic structural, stereochemical and thermodynamic features of metal surfaces vis a vis those of discrete metal clusters suggests that the clusters are attractive models of metal surfaces for chemisorption and heterogeneous catalysis. Chemical and catalytic properties of the two classes are compared.

158 citations

Journal ArticleDOI
TL;DR: In this paper, the structural and catalytic properties of Co-Mo/Al2O3 catalysts sulfided at different temperatures have been elucidated by means of high resolution electron microscopy (HREM), ir, XRD, and chemisorption of oxygen.
Abstract: The changes, which take place in the structural and catalytic properties of Co-Mo/Al2O3 catalysts sulfided at different temperatures, have been elucidated by means of high resolution electron microscopy (HREM), ir, XRD, and chemisorption of oxygen. It was observed that high temperature sulfiding induces a growth in the Co-Mo-S crystals which are MoS2-like with Co occupying edge positions. For all the catalysts, Co-Mo-S was found to be the most important feature in determining the HDS activity and it was found that the changes, which occur with the HDS activity, can be explained in terms of the changes in the total MoS2 edge area and its Co coverage. When saturation edge coverage is exceeded, segregation of excess Co in the form of Co9S8 takes place. Differences in the hydrogenation activity can be explained in terms of variations in the relative number of promoted vs. unpromoted MoS2 edge sites. Upon increasing the sulfiding temperature, the nature of the Co-Mo-S structure changes from a low temperature form (Type I Co-Mo-S) to a high temperature form (Type II Co-Mo-S). It is suggested that support interactions are less important for Type II Co-Mo-S than for Type I.

147 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20104,272
199748
199611
19921
198711
19842