225780-45-0Relevant academic research and scientific papers
The importance of the length of the -(CH2)n- chain on the cycloplatination of the [(η5-C5H 5)Fe{(η5-C5H4)-CHN-(CH 2)n-NMe2}] (n = 2 or 3) ligands and the properties of the platinacycles
López, Concepción,Solans, Xavier,Font-Bardía, Mercè
, p. 631 - 634 (2005)
The study of reaction of [(η5-C5H 5)Fe{(η5-C5H4)-CHN-(CH 2)2-NMe2}] (1b) with cis-[PtCl 2(dmso)2] under different experimental conditions is reported. When the reaction was carried out in the presence of NaOAc in a OAc-/1b molar ratio = 2 in a mixture of toluene/methanol (20:5) under reflux for 3 days, the cycloplatinated complex: [Pt{[(η5-C 5H3)-CHN-(CH2)2-NMe 2]Fe(η5-C5H5)}Cl(dmso)] (2b) together with small amounts of ferrocenecarboxaldehyde and cis- [Pt{(η5-C5H5)Fe[(η5-C 5H4)-CHN-(CH2)2-NMe 2])}Cl2(dmso)] (3b) was isolated. The X-ray crystal structure of 2b confirmed that the ligand acts as a terdentate [C(sp2,ferrocene),N,N′]- group. Complex 2b reacted with the stoichiometric amount of PPh3 giving [Pt{[(η5-C5H 3)-CHN-(CH2)2-NMe2] Fe(η5-C5H5)}Cl(PPh3)] (4b). Electrochemical studies of 2b-4b reveal that the proclivity of the ferrocenyl moiety to oxidise is dependent on the mode of binding of the ligand to the platinum(II).
