Haakon Hope

An unusual carbon-carbon bond cleavage in bulky metal alkoxides: syntheses and x-ray crystal structures of three-coordinate manganese(II) and chromium(II) complexes containing the di-tert-butylmethoxide ligand

Etude des structures cristallines des composes [{Cr(μ-OCH-t-Bu 2 )(OC-t-Bu 3 )} 2 ] et [Mn 3 (OCH-t-Bu 2 ) 6 ]. Le premier cristallise dans le systeme triclinique, groupe P1 et le second dans le systeme monoclinique, groupe P2 1 /c. Coordination plane triangulaire autour des atomes Cr

Reaction of dicobalt octacarbonyl with acetylene and carbon monoxide at low temperature and pressure: Formation of cyclic enone products

Abstract Dicobalt octacarbonyl is shown to react with acetylene and carbon monoxide under mild conditions in dimethoxyethane or benzene to produce, in low yields, bicyclo[3.3.0]octa-3,7-diene-2,6-dione, benzoquinone, and the cyclopentadienone-derived products 3a,4,7,7a-tetrahydro-2,7-methanoindene-1,10-dione, 1-indanone, tetracyclo[5.5.2.0 2,6 0 8,12 ]tetradeca-4,10,13-triene-3,9-dione, and tetracyclo[5.5.2.0 2,6 0 8,12 ]tetradeca-4,9,13-triene-3,11-dione. Possible mechanisms for the formation of these products are discussed.

Oligothiophenes II: Synthesis and Stability of 5‐Methylenethiophen‐2(5H)‐ones

Abstract This article describes an improved synthesis of substituted 5‐methylenethiophen‐2(5H)‐ones. These compounds are characterized by an unusual lack of reactivity as demonstrated by a number of unsuccessful reactions. The reason for this is suggest. The products were analyzed by UV, IR, NMR, and MS and by x‐ray crystallography.

Oligothiophenes III: Synthesis of tetra-thienyl-substituted ethylenes including an abnormal McMurry coupling result

Abstract This article describes the synthesis of some selected tetra‐thiophenyl‐substituted ethenes by McMurry coupling of some selected thienyl ketones, including a surprising coupling product. The products were analyzed by MS, NMR, UV, and x‐ray crystallography. Their cyclic voltagrams were recorded.