790689-34-8Relevant academic research and scientific papers
Factors affecting the lability of the σ(M-X) bond in cycloplatinated and cyclopalladated complexes containing [C(sp2, ferrocene),N,X]- or [C(sp2, phenyl),N,X]- (X = S, N) terdentate ligands
Pérez, Sonia,López, Concepción,Caubet, Amparo,Solans, Xavier,Font-Bardia, Mercè
, p. 3184 - 3196 (2007/10/03)
The reactions of the cyclometallated complexes [M{[(η5- C5H3)-CH = N (C6H4-2-SMe)]Fe (η5-C5H5)}Cl] [with M = Pt (5a) or Pd (5b)] with PPh3 under different experimental conditions are reported. These studies have allowed the isolation of [M{[(η5-C5H3)- CH = N-C6 H4-2-SMe)]Fe(η5-C5H5)} (PPh3)]X [M = Pt and X- = Cl- (6a) or BF4 (7a) or M = Pd and X- = Cl- (6b) or BF4 (7b)] and the neutral comlex [Pd{[(η5-C5H3)-CH = N-(C6 H4-2-SMe)]Fe(η5-C5H5)}Cl (PPh3)] (8b). In 6-7a.b the ferrocenyl Shiff base behaves as a [C(sp2, ferrocene),N,S] group while in 8b it acts as a [C(sp2, ferrocene),N] ligand. The X-ray crystal structure of 7b confirms the mode of binding of the ferrocenyl ligand. The comparison of the results obtained and those reported for [M{(C6H4)-CH = N-(CH2-CH2- 2-SEt)}Cl] and [M{(C6H4)-CH = N-(C6 H4-2-SMe)}Cl] {with a [C(sp2, phenyl),N,S]- terdentate ligand} or [M{[(η5- C5H3)-CH = N-(CH2)3- NMe2]Fe(η5-C5H5)}Cl] {in which the ligand acts as a [C(sp2, ferrocene),N,N′]- group} have allowed the elucidation of the relative importance of the factors affecting the lability of the M-X (X = S or N′) and M-Cl bonds in cyclometallated compounds with [C,N,S]- and [C(sp2, ferrocene),N,X]- ligands.
