Enhancing catalytic activity towards Heck-reaction by using 4, 5, 9, 10-tetra(arylimino)pyrenylidenyldipalladium tetrachlorides. Issue 19 (28th January 2015)

• Record Type: Journal Article
• Authors: Zhao, Tong; Xing, Qifeng; Song, Kuifeng; Ban, Qing; Liang, Tongling; Liu, Qingbin; Sun, Wen-Hua
• Is Part Of: RSC advances. Volume 5:Issue 19(2015)
• Page Start: 14228
• Page End: 14234
• Publication Date: 2015-01-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c4ra16193a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A series of binuclear 4, 5, 9, 10-tetra(arylimino)pyrenylidenyldipalladium(ii ) tetrachloride complexes (Pd1–Pd4 ) was synthesized and characterized by FT-IR and NMR spectroscopy as well as elemental analysis. Abstract : A series of binuclear 4, 5, 9, 10-tetra(arylimino)pyrenylidenyldipalladium(ii ) tetrachloride complexes (Pd1–Pd4 ) was synthesized and characterized by FT-IR and NMR spectroscopy as well as elemental analysis. The molecular structures of representative complexesPd1 andPd2 were determined by single crystal X-ray diffraction to reveal a square planar geometry around the palladium centre. The complexPd1 dissolved in the presence of ethanol to form mono-palladium complexC1, whose structure was also confirmed by single crystal X-ray diffraction. All binuclear palladium complexes promote the Heck cross-coupling reactions with high activities; the reaction can be carried out for various substrates and activators (basic compounds) and also in various solvents. The binuclear palladium complexes exhibit significantly higher efficiency than do their mono-palladium complexes bearing 4, 5-bis(arylimino)pyrenylidenes.