Synthesis, characterization and catalytic activity of three palladium(II) complexes containing Schiff base ligands

Three new Pd(II) complexes of Schiff base ligands, namely, [Pd 4 (L 1 ) 4 ] ( 1 ), [Pd 2 (L 2 ) 2 Cl 2 ] ( 2 ) and [Pd(L 3 ) 2 Cl 2 ] ( 3 ) [ HL 1  = N-(benzylidene)-2-aminophenol; L 2  = N-(2,4-dichlorobenzylidene)-2,6-diethylbenzenamine, L 3  = 4-(2,4-dichlorobenzylide-neamino)phenol] have been sy...

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Published inTransition metal chemistry (Weinheim) Vol. 37; no. 7; pp. 661 - 669
Main Authors Guo, Hai-Fu, Pan, Yong, Ma, De-Yun, Lu, Kuan, Qin, Liang
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.10.2012
Springer Nature B.V
Subjects
Catalysis
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Organometallic Chemistry
Physical Chemistry
Schiff Base
Benzylidene
Sepiolite
Schiff Base Ligand
Acrylic Acid
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Summary:Three new Pd(II) complexes of Schiff base ligands, namely, [Pd 4 (L 1 ) 4 ] ( 1 ), [Pd 2 (L 2 ) 2 Cl 2 ] ( 2 ) and [Pd(L 3 ) 2 Cl 2 ] ( 3 ) [ HL 1  = N-(benzylidene)-2-aminophenol; L 2  = N-(2,4-dichlorobenzylidene)-2,6-diethylbenzenamine, L 3  = 4-(2,4-dichlorobenzylide-neamino)phenol] have been synthesized using solvothermal methods and characterized by elemental analysis, spectroscopy and single crystal X-ray diffraction. The crystal structures of the free ligands were also determined. The μ-oxygen-bridged tetranuclear cyclometallated Pd(II) complex ( 1 ) contains four nearly planar units, in which Pd II is four-coordinate. Complex 2 is a μ-chloro-bridged dinuclear cyclometallated Pd(II) complex, whereas complex 3 is mononuclear. The Heck reactions of bromobenzene with acrylic acid catalyzed by complexes 1 – 3 have also been studied.
ISSN:0340-4285
1572-901X
DOI:10.1007/s11243-012-9635-y