726137-07-1Relevant articles and documents
Synthesis and Catalytic Activity of Square-Planar Ni(II) Complexes of Bis-N,N′-disubstituted Oxamides and Related Ligands for Epoxidation of Olefins
Zheng,Wang,Yan
, p. 19 - 25 (2007/10/03)
Four new monomeric square-planar nickel(II) complexes of two bis-N,N′-disubstitute oxamides and related ligands have been prepared and characterized, namely [NMe4]2[Ni(L)]·xH 2O, where L = dbopba = 3,5-dibromo-o-phenylenebis-(oxamate) and dbmeopba = 3,5-dibromo-o-phenylenebis-(N′-methyloxamidate), L = meopba = 4-methyl-o-phenylenebis-(oxamate) and memeopba = 4-methyl-o-phenylenebis- (N′-methyloxamidate). NMe4 is thetetramethylammonium cation. Based on elemental analyses, IR and UV spectroscopies and molar conductance data, the complexes are proposed to have a square-planar structure. Their catalytic activities for aerobic epoxidation of olefins with co-oxidation of iso-butylaldehyde have been discussed.