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'Photochemical Reactions' in keywords Facet   Publication Year 1991  [X]
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1991[X]
1Author    CorneliusG. Kreiter, Klaus LehrRequires cookie*
 Title    Photochemische Reaktionen von Übergangsmetall-Organyl-Komplexen mit Olefinen, VI [1] Reaktionen von Tricarbonyl-T]5-2,4-cyclohexadienyl-mangan mit konjugierten Dienen Photochem ical Reactions of Transition Metal Organyl Complexes with Olefins, VI [1] Reactions o f Tricarbonyl (^5-2,4-cyclohexadienyl)manganese with Conjugated Dienes  
 Abstract    Tricarbonyl-?/5-2,4-cyclohexadien-l-yl-manganese (1) was reacted photochemically at 253 K with simple conjugated dienes. Four different types of products were obtained, depending upon the dienes. With 1,3-butadiene (A) dicarbonyl-743-l-(3-buten-l,2-diyl)-2,4-cyclohexa-diene-manganese (2 A) is isolated. 2-Methyl-1,3-butadiene (B) yields the methyl-substituted diastereomeric dicarbonyls 2B, 2B', the [4+5]-cycloadduct tricarbonyl-//3:2-3-methyl-bicyclo-[4.3. l]-3,8-decadien-7-yl-manganese (3B) and tetracarbonyl-?/3-4-methylene-bicyclo[4.3. l]-8-decen-3-yl-manganese (4B) with an exocyclically coordinated tetracarbonylm anganese frag­ ment. W ith 2,3-dimethyl-1,3-butadiene (C) only the [4+5]-cycloadduct 3C and the tetracar-bonyl 4C are obtained. No CC-bond formation is observed with ^,^-2,4-hexadiene (D) and 1,3-cyclohexadiene (E). Carbonyl-75-2,4-cyclohexadien-1 -yl-74-£,> £'-2,4-hexadiene-manganese (5D), and carbonyl-74-l,3-cyclohexadiene-^5-2,4-cyclohexadien-l-yl-manganese (5E) are the only products. The complexes were separated and purified by HPL chrom atography. Their constitutions were determined by IR and N M R spectroscopy. 
  Reference    Z. Naturforsch. 46b, 1377—1383 (1991); eingegangen am 4. April 1991 
  Published    1991 
  Keywords    Diene Controlled C -C Bond Form ation, Manganese, Photochemical Reactions 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1377.pdf 
 Identifier    ZNB-1991-46b-1377 
 Volume    46