496957-14-3Relevant academic research and scientific papers
Reactivity of cyclometallated palladium(II) compounds derived from N-(benzylidene)xylylendiamines
López-Torres, Margarita,Juanatey, Pilar,Fernández, Jesús J,Fernández, Alberto,Suárez, Antonio,Vázquez-García, Digna,Vila, José M
, p. 2063 - 2069 (2008/10/08)
The reaction of [1,3-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (μ-O2CMe)}2C6H4] (1), with triphenylphosphine in a 1:2 molar ratio gave the doubly cyclometallated complex [1,3-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (OAc)(PPh3)}2C6H4] (3), after cleavage of the two acetate-bridges. Treatment of the chloro-bridged complexes [1,3-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (μ-Cl)}2C6H4]2 (2) and [1,4-{Pd[2,3,4-(MeO)3C6HC(H)=N-CH2] (μ-Cl)}2C6H4]2 (8) with the tertiary monophosphines PPh3, P(p-MeOC6H4)3 and P(p-NMe2C6H4)Ph2 gave the doubly cyclometallated complexes [1,3-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (Cl)(PR3)}2C6H4] (PR3= PPh3, 4; P(p-MeOC6H4)3, 5; P(p-NMe2C6H4)Ph2, 6) and [1,4-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (Cl)(PR3)}2C6H4] PPh3 = 9; P(p-MeOC6H4)3, 10; P(p-NMe2C6H4)Ph2, 11). Reaction of complex 4 with PPh3 did not yield the expected non-cyclometallated complex. Reaction of complexes 2 and 8 with the tertiary diphosphine cis-Ph2PCH=CHPPh2, in a 1:4 molar ratio and NaClO4, yielded the doubly cyclometallated complexes [1,3-{Pd[2,3,4-(MeO)3C6HC(H)=NCH2] (Ph2PCH=CHPPh2-P,P)}2C6 H4][ClO4]2 (7) and [1,4-{Pd[2,3,4-(MeO)3C6HC(H)= NCH2](Ph2PCH=CHPPh2-P,P)}2 C6H4][ClO4]2 (12), respectively, with the diphosphine as a chelating bidentate ligand.
