<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Acidic ionic liquids based on trihexyltetradecylphosphonium chloride-P6.6.6.14 Cl and six different metal chlorides (YCl3, YbCl3, MgCl2, ZnCl2, CuCl2, InCl3) were prepared. The molar fraction of metal chloride (XMClx) used for the formation of acidic ionic liquids with P6.6.6.14 Cl was changed in the range from 0.3 to 0.5. The high catalytic activity in the Diels-Alder reaction of cyclopentadiene and various αβ-unsaturated carbonyl compounds showed ionic liquids at XMClx≤0.4. In general, the highest product yields and <italic>endo:exo</italic> ratios were achieved in the acidic ionic liquids formed from MgCl2, YCl3 and YbCl3. Thermogravimetric analysis suggested that the prepared ionic liquids were thermally stable up to nearly 400°C. Additionally, they could be reused with only little loss of catalytic activity after the 4th recycle.</abstract>

Acidic ionic liquids based on trihexyltetradecylphosphonium chloride-P6.6.6.14 Cl and six different metal chlorides (YCl3, YbCl3, MgCl2, ZnCl2, CuCl2, InCl3) were prepared. The molar fraction of metal chloride (XMClx) used for the formation of acidic ionic liquids with P6.6.6.14 Cl was changed in the range from 0.3 to 0.5. The high catalytic activity in the Diels-Alder reaction of cyclopentadiene and various αβ-unsaturated carbonyl compounds showed ionic liquids at XMClx≤0.4. In general, the highest product yields and endo:exo ratios were achieved in the acidic ionic liquids formed from MgCl2, YCl3 and YbCl3. Thermogravimetric analysis suggested that the prepared ionic liquids were thermally stable up to nearly 400°C. Additionally, they could be reused with only little loss of catalytic activity after the 4th recycle.

Acidic ionic liquids based on phosphonium chloride and metal chlorides-recyclable media and catalysts in the Diels-Alder reaction

Department of Organic Chemical Technology, West Pomeranian University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland

Polish Journal of Chemical Technology

Acidic ionic liquids based on trihexyltetradecylphosphonium chloride-P6.6.6.14 Cl and six different metal chlorides (YCl3, YbCl3, MgCl2, ZnCl2, CuCl2, InCl3)...

Acidic ionic liquids based on phosphonium chloride and metal chlorides-recyclable media and catalysts in the Diels-Alder reaction

Published Online: Jul 09, 2010

Page range: 33 - 37

DOI: https://doi.org/10.2478/v10026-010-0015-0

Keywords
acidic ionic liquids, Diels-Alder reaction, metal chlorides

This content is open access.

Acidic ionic liquids based on phosphonium chloride and metal chlorides-recyclable media and catalysts in the Diels-Alder reaction

Published Online: Jul 09, 2010

Page range: 33 - 37

DOI: https://doi.org/10.2478/v10026-010-0015-0

Keywordsacidic ionic liquids, Diels-Alder reaction, metal chlorides

This content is open access.

Keywords
acidic ionic liquids, Diels-Alder reaction, metal chlorides