[PtCl(η1-CH2-CH2OR)(NˆN)] and [PtCl(η2-CH2CH2)(NˆN)]+, NˆN = dinitrogen ligand, complexes. Sterical and electronic effects evidenced by NMR analysis

In this work we report on the synthesis of new [PtCl(η2-CH2=CH2)(NˆN)]+ and [PtCl(η1-CH2−CH2OCH3)(NˆN)] complexes, with different NˆN dinitrogen ligands. The factors determining complex stability are highlighted, and discussed in relation to 1H, 13C and 195Pt NMR chemical shifts exhibited by different complexes bearing hindered or unhindered diamine or diimine ligands.