Polarized Complexes Obtained by Regiospecific Substitution of a CN Group in Ru{C≡CC(CN)═C(CN)2}(dppe)Cp* (Cp* = η-C5Me5)
摘要:
The complex Ru{C CC(CN)=C(CN)(2)}(dppe)Cp* (1), containing the new tricyanovinylethynyl (3,4,4-tricyanobut-3-en-1-ynyl) ligand, undergoes ready substitution of the 3-cyano group by nucleophiles (Nu) such as H, Me, Pr-i, Bu, Bu-t, mesityl, OMe, OBut, OCH2CH=CH2, NHEt, NEt2, and PPh2 to give Ru{C CC(Nu)=C(CN)2}(dppe)Cp*. The X-ray diffraction structures of several of the resulting complexes are reported and, for the mesityl and PPh2 products, show that isomerization to the 3,5-dimethylbenzyl and oxidation to the phosphine oxide have respectively occurred.