Syntheses, Structural Characterization, and Kinetic Investigations of Metalla[3]triangulanes: Isoelectronic Nickel(0) and Copper(I) Complexes with Bicyclopropylidene (bcp) and Dicyclopropylacetylene (dcpa) as Ligands

The kinetics of the reactions between [Ni(bipy)(COD)] and bicyclopropylidene (bcp), dicyclopropylacetylene (dcpa) 1,4-dimethoxy-2-butyne (dmbu) were investigated using stopped-flow techniques. Similar to previous studies results support an associative mechanism (activation parameters for bcp: ΔH#=46±2 kJ ⋅ mol−1 ΔS#=−69±8 J K−1) therefore allowed postulate a more general reaction pathway. products, nickel(0) complexes [Ni(bipy)(bcp)] [Ni(bipy)(dcpa)], could be structurally characterized molecular structures are presented. In addition, corresponding copper(I) [Cu(bipy)(bcp)]PF6 [Cu(bipy)(dcpa)]PF6 also their reactivity towards dioxygen was investigated. A detailed discussion structural properties comparisons similar literature-known olefinic with transition metals