ChemInform Abstract: Formation of Alkenyl Ketone Complexes and of Dimeric α,β‐Butenolides by Sequential Insertion of Phenylacetylene and Carbon Monoxide into Nickel‐Acyl Bonds. X‐Ray Structures of Cyclic Ni(C(Ph)=C(H)(COCH2SiMe3))Cl(PMe3)2 and Cyclic Ni(C(Ph)(PMe3)C(H)(COCH2CMe2Ph))Cl(PMe3). | Publicación