The mixed chloro/bromo π-olefin complexes cis-PtX2 (P(t-Bu)2CH2CH2CHCHCH3) )2) have been prepared by the reaction of Zeise's salt (K[PtCl3(C2H4)]) with P(t-Bu)2(CH2CH2CHCH2CH2) · HBr in boiling ethanol. The dimer complexes [PtX(P(t-Bu)2CH2CH2CHCH2CH2)]2 (μ-X)(μ-Y) (1) (X, Y Cl or Br) form first with subsequent activation of cyclopropane to give the monomeric π-olefin complexes (2). The mixed π-olefin complexes 2 co-crystallize. The average structure of 2 has been determined by X-ray methods. The relative occupanies in bromine for halogen sites cis- and trans- to coordinated olefin are 0.464(6) and 0.256(6), respectively. The olefin is symmetrically bound to the Pt atom (PtC 2.17(1) Å). The olefinic CC bond length is 1.38(1) Å.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry