Palladium(II) Compounds Containing ?sp2(ferrocene)> Bonds and Ferrocenyloximes as Bidentate -Ligands X-ray Crystal Structure of 5-C5H3)-C(CH3)=N(OH)>Fe(η5-C5H5)>Cl(PPh3)>

Article abstract of DOI:10.1016/S0022-328X(97)00030-2

Ferrocenyloximes of general formula <<(η⁵-C5H4)-C(R)=N(OH)>Fe(η⁵-C5H5)>> with R = H (1a) or CH3 (1b) react at room temperature in methanol with Na2 and Na(CH3COO)*3H2O in a 1:1:1 molar ratio producing the di-μ-chloro-bridged derivatives 5-C5H3)-C(R)=N(OH)>Fe(η⁵-C5H5)>(μ-Cl)>2 (with R = H (2a) or CH3 (2b)) which undergo cleavage of the 'Pd(μ-Cl)2Pd' units in the presence of PPh3 to give the mononuclear cyclopalladated complexes 5-C5H3)-C(R)=N(OH)>Fe(η⁵-C5H5)>Cl(PPh3)> (with R = H (3a) or CH3 (3b)).The molecular structure of compound 3b has been determined by X-ray crystallography: monoclinic, space group C2/c with a = 27.485(5) Angstroem; b = 9.964(2) Angstroem; c = 24.778(4) Angstroem and β = 131.07(3) deg.These studies confirm the presence of a five-membered palladacycle fused with the C5H3 ring of the ferrocenyl moiety, and a trans arrangement of the phosphine and the nitrogen. - Keywords: Palladium(II) compounds; Ferrocenyloximes; Molecular structure