Metallkomplexe 6,6′-Dialkinyl-substituierter 2,2′-Bipyridin-Liganden: Synthese und Struktur von [{6,6′-(CH3CH2CH2C = C)2bpy}Cu(Cl)(µ-Cl)]2 / Metal Complexes of 6,6′-Dialkynyl-Substituted 2,2′-Bipyridine Ligands: Synthesis and Structure of [{6,6′-(CH3CH2CH2C = C)2bpy}Cu(Cl)(µ-Cl)]2

Abstract

Abstract The bipyridyldiacetylene 6,6′-(CH3CH2CH2C = C)2bpy (1) was prepared by palladium catalyzed C - C - coupling reaction of 6,6′-dibromo-2,2′-bipyridine with pentyne. Reaction of 1 with anhydrous CuCl2 in acetonitrile gave the dimeric, chloro-bridged complex (1)Cu(Cl)(µ-Cl)2Cu(Cl)(1) (2), which was characterized by X-ray crystallography. The copper atoms in 2 are square-pyramidally coordinated with normal in-plane Cu - N and Cu - Cl bond distances and one longer, apical bond to the second bipyridyl nitrogen atom. The influence of steric hindrance of the bipyridyl 6,6′-substituents on the structure of the complex is discussed.