A simple preparation for (η6-arene)(η4-cyclo-octa-1,5-diene)ruthenium-(0) complexes and their conversion into the corresponding arene–dichlororuthenium(II) complexes

Abstract

A series of (η⁶-arene)(η⁴-cyclo-octa-1, 5-diene)ruthenium(0) complexes have been readily prepared by reaction of (η⁴-cyclo-octa-1,5-diene)(η⁶-cyclo-octa-1, 3, 5-triene)ruthenium(0) with arene compounds, under 1 atm H₂[arene = C₆H₆, CH₃ C₆H₅, 1, 4-Me₂C₆H₄, 1,3,5-Me₃C₆H₃, C₂H₅C₆H₅, Me₂CHC₆H₅, Et₂CHC₆H₅, C₆H₅(CH₂)₃ C₆H₅,C₆H₅C₆H₅, C₂H₅CH(Me)C₆H₅, Me₂CHCH(Me)C₆H₅, NH₂CH(Me)C₆H₅, CH₃OC₆H₅, or CH₃COC₆H₅]. These complexes react with aqueous HCI to give in almost quantitative yield the corresponding (η⁶-arene)-dichlororuthenium(II) complexes.