Abstract
Using the sterically encumbered 1,2-bis(di-tert-butylphosphino)ethane (dtbpe) ligand, a family of terminal anilido compounds of the general form (dtbpe)PtX(NHAr) (X=Cl, 2; Me, 6; Ph, 7; Ar=2,6-di-isopropylphenyl) as well as (dtbpe)Pt(NHPh)2 (8) were prepared in high isolated yields via salt metathesis using (dtbpe)PtCl2. Likewise, new sterically encumbered terminal phosphido compounds were prepared of the general form (dtbpe)PtX(PHAr) (X/Ar=Cl/dmp, 9; Cl/Mes∗, 10; Me/Mes∗, 11; where dmp=2,6-dimesitylphenyl, Mes∗=2,4,6-tri-tert-butylphenyl). Both families of compounds resist attempts to deprotonate the amido or phosphido ligand with either external bases or through alkane or arene elimination. Compound 11 reacts with various acids to afford salts having the cation [(dtbpe)PtMe(PH2Mes∗)]+ [12]+. Compounds 6, 9·0.5Et2O, 10·Et2O, 11·Et2O, and the salt [12][BArf4] were structurally characterized.
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