catena-Poly[[[bis(2-pyridyl) ketone-N,N']copper(II)]-di-μ-chloro]

A copper-catalyzed domino reaction to construct functionalized indolizinones

An efficient one-step copper-catalyzed domino reaction to 3,8α-disubstituted indolizinone derivatives has been developed for the first time, in which cheap and readily available pyridine ketones and terminal alkynes are the starting materials.

Di-μ-bromido-bis-[bromido(di-2-pyridylmethane-diol-κN,N')copper(II)] dihydrate

The centrosymmetric title complex, [Cu(2)Br(4)(C(11)H(10)N(2)O(2))(2)]·2H(2)O, was one of three complexes isolated by slow evaporation of an acetonitrile reaction mixture of CuBr(2) with di-2-pyridyl ketone (1:1 molar ratio). The title complex contains a 1:1 metal-to-ligand ratio of copper(II) with the hydrated form of the ligand di-2-pyridylmethane-diol. The copper centers are bridged by bromide donors, leading to a Cu-Cu distance of 4.090 (6) Å. The crystals form as non-merohedral twins with two components related by a 180° rotation around the normal to [100]; the selected sample had a twin ratio of 0.63:0.37.

catena-Poly[[μ-bromido-(μ-hydroxydi-2-pyridylmethano-lato-κN,O:O,N')dicopper(II)(Cu-Cu)]-di-μ-bromido]

The title complex, [Cu₂Br₃(C₁₁H₉N₂O₂)]_n, was one of three isolated by slow evaporation of an acetonitrile reaction mixture of CuBr₂ with di-2-pyridyl ketone (1:1 molar ratio). The title complex contains a 2:1 metal-to-ligand ratio of copper(II) with the hydrated form of the ligand, di-2-pyridylmethane­diol. The two copper centers are bridged by a bromide ion and the alk­oxy O atom, and the Cu—Cu distance is 2.9801 (5) Å. The dimeric units are further linked by bromide ions, leading to a two-dimensional extended bridged structure. O—H⋯O hydrogen bonds are present in the crystal structure.