Diphenylacetylene complexes with ruthenium

The reaction between acetylenes and ruthenium carbonyls produces a series of n complexes with cyclic ligands which, as in the iron system, have either the metal or a CO group incorporated into the ring. Accordingly, 3-hexyne 536) and hexafluoro-2-butyne 90) react with Ru3(CO)i2 to give the (substituted cyclopentadienone)tricarbonylruthenium complexes with structures presumably comparable to those of the iron complexes (93-95). Although diphenylacetylene will not react directly with Ru3(CO)i2 to produce this type of complex 536), it can be prepared 90) by treating Ru3(CO)i2 with tetracyclone in benzene under reflux. 

The Pt2Ru4(CO)i8 cluster reacts with H2 to form Pt3Ru6(CO)2i(/i3-H)-(jt-H)3 in which the platinum and ruthenium atoms are arranged in triangular layers of the pure elements.10 This complex can be converted to Pt3Ru6(CO)20(/i3-C2Ph2X/i-H)2 by reaction with diphenylacetylene.10 The latter complex was found to be an active catalyst for the hydrogenation... 

It has been also found that the platinum-ruthenium cluster complex [Pt3Ru6(CO)20(p3-PhC2Ph)(p3-H)(p-H)] is an effective catalyst precursor for the highly selective catalytic hydrosilylation of diphenylacetylene with tri-ethoxysilane (Eq. 15). The true catalyst is actually the decarbonylated species. 

Cyclopentadienyl dicarbonyl ruthenium dimer 132 reacts with silver tetrafluoroborate and diphenylacetylene to afford the cyclobutadiene ruthenium complex 133 (Scheme 12). Irradiation of 133 in dichloro-methane in the presence of several alkynes leads to the arene cyclopentadienyl ruthenium complexes 125 in high yield. This reaction appears to be a general route to sterically crowded ruthenium arene cations (55). 

Dependent upon the reaction conditions, diphenylacetylene (L) reacts with Ru3(CO)i2 to produce either purple L3Ru3(CO)9 or yellow L2Ru2(CO)g 536). The former complex produced at 70°C in hexane probably has the structure of Ru3(CO)i2 with one CO ligand at each ruthenium atom replaced by a diphenylacetylene molecule, whereas the latter complex obtained at 200°C in decalin probably has a structure... 

Adams RD, Wu W. Adams RD, Wu W. Cluster synthesis. 41. New platinum-ruthenium cluster complexes from the reaction of diphenylacetylene PhC Ph with Pt2Ru4(CO)i8. Synthesis and structural characterizations of Pt2Ru3(CO)g(p3-Ti -PhC2Ph)2(n4-Tl -PhC2Ph), PtjRueCCO) 14(p3-ri -PhC2Ph)3, Pt2Ru4(CO)14(p3-T] -... 

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