Mono-, Di-, and Trinuclear Palladium(II) Complexes Containing a Ligand with One, Two, or Three 1,2-Dihydroquinazolinium-4-yl Groups

Complexes containing one, two, or three 1,2-dihydro-3-xylylquinazolinium-4-yl palladium units are obtained by reacting dialdehydes (C6H4(CHO)2-1,4, C6H4(CHO)2-1,3, 1,1′-ferrocenedicarboxaldehyde) or the trialdehyde 1,3,5-tris-(4-formylphenyl)benzene) with 1, 2, or 3 equiv of each of the amino(iminobenzoyl) complex trans-[PdI{C(NXy)C6H4NH2-2}(CNXy)2] (Xy = C6H3Me2-2,6) and triflic acid (HOTf), through a hydroiminiumation of the imine formed between the aldehyde and 2-amino group. The crystal structures of the dinuclear derivatives prepared from C6H4(CHO)2-1,4 and C6H4(CHO)2-1,3 have been determined, and the electrochemical behavior of the dinuclear ferrocenyl derivative has been studied.