Monomeric bis(η 2 -alkyne) complexes of (η 1 -mesityl)copper( I ) and (η 1 -mesityl)silver( I ) obtained from a bis(alkynyl)titanocene; X-ray structure of [(η 5 -C 5 H 4 SiMe 3 ) 2 Ti(CCSiMe 3 ) 2 ]Cu(η 1 -Mes)(Mes = C 6 H 2 Me 3 -2,4,6)

Polynuclear mesitylcopper and mesitylsilver react with [(η5-C5H4SiMes3)2Ti(CCSiMe3)2]1 to afford the monomeric complexes [1·Cu(η1-Mes)]2, and [1·Ag(η1-Mes)]3, in which both alkyne moieties of the 3-titanopenta-1,4-diyne unit are η2-coordinated to a MesCu(Ag) unit.