155804-86-7Relevant articles and documents
Cyclopalladated complexes of 2-acetylpyridine phenylhydrazone: A terdentate C,N,N′ donor ligand
García-Herbosa, Gabriel,Mu?oz, Asunción,Miguel, Daniel,García-Granda, Santiago
, p. 1775 - 1780 (2008/10/08)
Cyclopalladated complexes of 2-acetylpyridine phenylhydrazone [Pd(C6H4N(H)N=C(CH3)-C5H 4N)Cl] (2) and [Pd(C6H4N(H)N=C(CH3)C5H 4N)L]BF4 (L = PPh3 (3a), P(OMe)3 (3b), P(OPh)3 (3c), CH3C5H4N (3d), C4H8S (3e)) containing readily deprotonable N-H bonds have been prepared. Blue zwitterionic species, obtained after deprotonation of the cationic complexes, are characterized by their reactivity as nucleophiles toward H+ or CH3I; e.g. deprotonated (3a) reacts with CH3I to give [Pd(C6H4N(CH3)N=C(CH3)C 5H4N)I] (5). Some aspects of the orthometalation reaction mechanism of phenylhydrazones are discussed. The crystal and molecular structure of the face to face complex {[Pd(C6H4N(H)N=C(CH3)C5H 4N)]2(μ-Ph2PCH2PPh 2)}[BF4]2·OEt2·NCMe (4) [monoclinic, space group P21/n, a = 15.911(4) A?, b = 18.902-(6) A?, c = 18.563(4) A?, β = 95.43(2)°, Z = 4, R = 0.032, and Rw = 0.034 for 7038 observed reflections] shows a nonbonding Pd-Pd distance of 3.114(1) A?.