Intramolecular oxidative addition of C–F and C–H bonds to [Pt(dba)2]. Crystal structure of [PtCl{Me2NCH2CH2NCH(2,4,5-C6HF3)}]

The reactions of compound [Pt(dba)2] with ligands RCHNCH2CH2NMe2 (1a–1f) in which R is a fluorinated aryl ring produced activation of C–F bonds when two fluorine atoms are present in the ortho positions of the aryl ring or activation of C–H bonds for ligands containing only one fluoro substituent in ortho. Both C–F and C–H bond activation are favoured by an increase of the degree of fluorination of the ring. Further reaction with lithium halides produced cyclometallated platinum (II) compounds [PtX(Me2NCH2CH2NCHR)] (X = Br, Cl) (2) containing a terdentate [C,N,N′] ligand. The obtained compounds were fully characterized including a structure determination for [PtCl{Me2NCH2CH2NCH(2,4,5-C6HF3)}] (2d′).