Cationic cyclopalladated complexes: new catalyst precursors for the telomerization of butadiene with alcohols

✍ Scribed by Mariângela Camargo; Paulo Dani; Jaïrton Dupont; Roberto F. de Souza; Michel Pfeffer; Igor Tkatchenko

• Book ID: 103997664
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 412 KB
• Volume: 109
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(96)00024-6

✦ Synopsis

The cationic cyclopalladated complexes derived from N. N-dimethylbenzylamine 4, N-benzylidene-(S)-( -&-methylbenzylamine 5 and Smethyl quinoline 6 have been prepared and their properties as catalyst precursors for the telomerization of butadiene with methanol were investigated. The butadiene conversion was 60-70% for the three complexes and a mixture of butadiene dimers and telomers containing 2, 4 and 6 butadiene units were formed. The product selectivity is strongly influenced by the nature of the cyclopalladated complex. Thus, with complex 6 the Cl6 and C24 telomers were formed preferentially (more than 8.5%). On the other hand, with complex 4 the amount of butadiene dimers is greater than 40%. Complex 6 is also active for the telomerization of other aliphatic alcohols. hut in these cases the I-and Salkoxy octadiene telomers were produced preferentially.