14327-01-6Relevant articles and documents
Steric control over hydrogen bonding in crystalline organic solids: A structural study of N,N′-dialkylthioureas
Custelcean, Radu,Gorbunova, Maryna G.,Bonnesen, Peter V.
, p. 1459 - 1466 (2005)
Hydrogen bonding in crystalline N,N′-dialkylthioureas was examined with the help of single-crystal X-ray diffraction, DFT calculations, and Cambridge Structural Database (CSD) analysis. A CSD survey indicated that unlike the related urea derivatives, which persistently self-assemble into one-dimensional hydrogen-bonded chains, the analogous thioureas can form two different hydrogen-bonding motifs in the solid state: chains, structurally similar with those found in ureas, and dimers, that further associate into hydrogen-bonded layers. The formation of one motif or another can be manipulated by the bulkiness of the organic substituents on the thiourea group, which provides a clear example of steric control over the hydrogen bonding arrangement in crystalline organic solids.
Continuous-flow synthesis of thioureas, enabled by aqueous polysulfide solution
ábrányi-Balogh, Péter,Keser?, Gy?rgy M.,Mándity, István M.,Németh, András Gy.,Orsy, Gy?rgy,Szabó, Renáta
, (2021/06/25)
We have developed the continuous-flow synthesis of thioureas in a multicomponent reaction starting from isocyanides, amidines, or amines and sulfur. The aqueous polysulfide solution enabled the application of sulfur under homogeneous and mild conditions. The crystallized products were isolated by simple filtration after the removal of the co-solvent, and the sulfur retained in the mother liquid. Presenting a wide range of thioureas synthesized by this procedure confirms the utility of the convenient continuous-flow application of sulfur.
Pos [...] 4 group metal olefin polymerization catalyst
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Paragraph 0317-0319, (2019/08/27)
Embodiments are directed to phosphaguanidine metal complexes of formula I and using those complexes in α-olefin polymerization systems.