η3-Allyl complexes of palladium containing 7,8-benzoquinoline and 8-methyl-quinoline

✍ Scribed by A.J. Deeming; I.P. Rothwell

• Book ID: 104137671
• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 527 KB
• Volume: 31
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)95014-x

✦ Synopsis

Displacement of the chloride ligands from [Pd(q3all)Cl]2 (all = allyl, 2-methylallyl or 1,3-dimethylallyl) by treatment with AgNO, or AgC104 gives acetone-soluble species. These were not isolated but were reacted with 7,8-benzoquinoline (bquin) or 8-methylquinoline (8-Mequin) to give complexes of type [Pd(all)L,]ClO, (L = bqyin or 8-Mequin), [Pd(all)XL] (X = NO3, L = bquin or 8-Mequin; X = C104, L = 8-Mequin) or [Pd(all)(H20)(8-Mequin)] Ci'04 Thus there is nothing preventing coordination of two ligands such as bquin or 8-Mequin, one largely above the other below the coordination plane. From DNMR observations on [Pd(all)(bquinll ] C104, exchange of the ends of the q3-ally1 has the same rate as exchange of the bquin ligands. The fastest dynamic process for [Pd(all)(HzO)(8-Mequin)] C104 involves Hz0 dissociation with the 8-Mequin passing from being largely on one to largely on the other side of

the coordination plane while retaining its coordinution pOSition trans to one end of the Q3-ally1 group.