Preparation and some properties of Pt(II) ruthenocenylacetylide complexes
摘要:
Ruthenocenylacetylene reacted with trans-PtI(C(6)H(4)X-p)(PPh(3))(2) (X = H, Me, OMe, Cl or CO(2)Me) in the presence of CuI in diethylamine-CH2Cl2 to give the Pt(II) ruthenocenylacetylide complexes, trans-Pt(C=CRc) (C(6)H(4)X-p)(PPh(3))(2) with a good yield. Similarly, cis-Pt(C=CRc)(C(6)H(4)OMe-p)(dppe) was prepared. The structure of trans-Pt(C=CRc)(C(6)H(4)CO(2)Et-p)(PPh(3))(2) was determined by single-crystal X-ray diffraction. No reaction of the trans isomers with DDQ or AgBF4 took place, while the cis isomer was oxidized with AgBF4 to give the coupling products RcC=CC(6)H(5)OMe-p with a low yield. The oxidation of the cis isomer with iodine occurred on the Pt atom to afford p-MeOC(6)H(4)I and PtI2(dppe) as the main products.