๐”– Bobbio Scriptorium
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Catalysis in aprotic solvents. Effect of the polarity of the catalyst.

โœ Scribed by Ennio Ciuffarin; Mauro Isola; Piero Leoni

Book ID
104244412
Publisher
Elsevier Science
Year
1981
Tongue
French
Weight
221 KB
Volume
22
Category
Article
ISSN
0040-4039

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๐Ÿ“œ SIMILAR VOLUMES

Effect of polar aprotic solvents on the
Effect of polar aprotic solvents on the trimerization of aliphatic isocyanates by organometallic catalysts
โœ S. Dahi; A. Zilkha ๐Ÿ“‚ Article ๐Ÿ“… 1980 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 271 KB

The polymerization of aliphatic isocyanates by organometallic catalysts such as tributyltin oxide, Ti(OBuh or Zr(OBu),, was slow and no enhancement in rate was found on addition of DMF or DMSO, contrary to what was found with PhNCO. However, similar to the latter, fast reactions were observed with c

Effect of polar aprotic solvents and org
Effect of polar aprotic solvents and organometallic catalysts on the reaction of alcohols with isocyanates
โœ S. Dabi; A. Zilkha ๐Ÿ“‚ Article ๐Ÿ“… 1980 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 310 KB

DMF and DMSO catalyse the reaction of butanol with PhNCO but inhibit that with aliphatic isocyanates, due to formation of an active 1 : 1 charge transfer complex with the aromatic isocyanate. Similarity was found in the mode of catalysis of the urethane reaction with these solvents to that with tert