Some Alkynyl‐Ruthenium Complexes Containing Di‐Imine and Tertiary Phosphine Ligands

Reactions between $\rm [RuCl_{2}(PPh_{3})_{2}(Bu^{t}_{2}bpy)]$ , ( 1 ), and terminal alkynes in the presence of Tl[PF 6 ], followed by chromatography on alumina, have given the mono‐alkynyl complexes $\rm [RuCl(C{\equiv}CR)(PPh_{3})_{2}(Bu^{t}_{2}bpy)]$ (R = Ph 2 , C 6 H 4 NO 2 −4 3 , CO 2 Me 4 , Fc 5 , CPh 2 (OH) 6 ), of which the single‐crystal XRD molecular structures of 3 , 4 and 5 are reported.