ONE-STEP SYNTHESIS OF ALKENYLOXY ALKENYLCARBENE COMPLEXES AND THE UNPRECEDENTED FORMATION OF AN ETA-5-ALLYL-ALKENE RUTHENIUM COMPLEX

Tetramethylbenzene alkenyloxy-alkenylcarbene ruthenium(II) derivatives [(C6Me4H2)Ru {=C[O(CH2)mCH=CH2]CH=CH(CH=CH)n-R}Cl(PMe3)]PF6 (m = 1, 2; n = 0, 1, 2) are produced in a one-step reaction from (C6Me4H2)RuCl2(PMe3) in the presence of propynylic alcohol derivatives HC=C-C(H)(OH)[(CH=CH)n-R] and ethylenic alcohols, whereas a similar reaction with HC=C-C(OH)Me2 affords a novel eta-5-allyl-alkene ruthenium complex, which is characterised by X-ray crystal structural analysis.