First Coordinatively Saturated Carbene Complexes of Platinum(II): Synthesis, Structure, and Reactivity
摘要:
Coordinatively saturated carbene complexes of platinum(II) have been obtained by oxidative addition of [ClCH=NMe2]Cl to Pt(0) precursors. The cationic products of general formula [PtCl(CHNMe2)(N,N-chelate)(olefin)]Cl have been characterized through NMR spectroscopy and for [PtCl(CHNMe2)(2,9-Me-2-1,10-phen)(Z-MeO2CCH=CHCO2Me)]Cl by X-ray diffractometry. The latter species reacts with nucleophiles affording dimethylformamide and the corresponding Pt(0) precursor [Pt(2,9-Me-2-1,10-phen)(Z-MeO2CCH=CHCO2Me)]. Attempts to obtain related complexes containing carbene groups Pt=CHY without a heteroatom in alpha-position (Y = CO2Et, CO2NMe2, CN) have led to the isolation of complexes of formula [PtR(dmphen){eta(1),eta(2)-CH(Y)O2CCH=CHCO2Me}] (R = Me, Ph), Formally derived fi om an intrasnolecular nucleophilic addition to a carbene intermediate. The X-ray structure of a representative product, [PtMe(dmphen){eta(1),eta(2)-CH(CO2Et)O2CCH=CHCO2Me}], is reported.
Organometallic polymers containing coordinatively saturated platinum(II) complexes as pendants
作者:Barbara Panunzi、Antonio Roviello、Francesco Ruffo、Alfredo Vivo
DOI:10.1016/s0020-1693(98)00157-1
日期:1998.11
The synthesis and some properties of soluble organometallic polymers which contain trigonal bipyramidal platinum(II) complexes as pendants are described. An N,N-chelate and an olefin define the equatorial plane of the complex, while two anionic ligands, or one anion and a pyridine nitrogen, occupy the axial positions. Each of the coordination sites was used to anchor the organometallic fragments to