Organodipalladium(II) cyclometallates of the schiff base N,N'-diethyl-2,6-dialdiminobenzene

Chakladar, Sukla ; Paul, Parimal ; Nag, Kamalaksha (1991) Organodipalladium(II) cyclometallates of the schiff base N,N'-diethyl-2,6-dialdiminobenzene Polyhedron, 10 (13). pp. 1513-1519. ISSN 0277-5387

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S02775...

Related URL: http://dx.doi.org/10.1016/S0277-5387(00)86074-X

Abstract

Syntheses and reactions of dipalladiobenzene derivatives have been reported. Li2[PdCl4] reacts with N,N'-diethyl-2,6- dialdiminobenzene (H2L) to form the cyclometallated compound, [Pd4L2Cl4], in which metallation occurs at the 3,5-carbon atoms of the aromatic ring. The tetrachloro compound can be converted to a dinuclear precursor complex, [Pd2L(MeCN)2(ClO4)2], which reacts with pyridine, 4-methylpyridine, pyrazole and imidazole (B) to produce complexes of the type [Pd2L(B)4](ClO4)2, and with 2,2'- bipyridine to produce [Pd2L(bpy)2](ClO4)2. A tetranuclear neutral complex [Pd4L2(pz)4] is formed when the precursor complex interacts with pyrazole and triethylamine. A series of neutral chelate compounds [Pd2L(AB)2] has been obtained by reacting the precursor with sodium salts of acetylacetone, ethylacetoacetate, N-methylsalicylaldimine (HAB) and N,N'- dimethyldithiocarbamic acid (HAB). The compounds have been characterized from their 1H NMR spectra.

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