Convenient access to an alkenyl(biscarbene)-bridged heterobinuclear (RuW) complex. X-ray structure of [(η6-C6Me4H2)RuC(OMe)(CHCHC6H4CHCHCO2Me)(Cl)(PMe3)][PF6]

Treatment of (CO)5WC(OMe)CHCHC6H4(OH)(H)CCH (2a) with the neutral tetramethylbenzene ruthenium precursor [(η6-C6Me4H2)Ru(Cl)2(PMe3)] (3), in the presence of one equivalent of NaPF6 (CH2Cl2–MeOH) affords, after work-up, the monometallic ester compound [(η6-C6Me4H2)Ru(Cl)(PMe3){C(OMe)CHCHC6H4CHCHCO2Me}][PF6] (5a), whereas, the expected bimetallic ruthenium–tungsten complex [(η6-C6Me4H2)Ru(Cl)(PMe3)C(OMe)CHCHC6H4CHCH(NMe2)CW(CO)5][PF6] (4b) is formed starting from the aminocarbene derivative 2b. Crystal structure analysis of 5a has been determined.