Direktsynthese von orthometallierten Ketonen des Typs RCO (o-C6H4)Mn(CO)4-nLn (R = Alkyl- und Arylrest, n = 0, 1, 2, L = Ligand)

0044-2313

Chemistry ; Inorganic Chemistry

Wiley InterScience Backfile Collection 1832-2000

Chemistry and Pharmacology

Direct Synthesis of Orthometallated Ketones of the Type RCO(o-C6H4)Mn(CO)4-nLn (R = Alkyl and Aryl Groups, n = 0, 1, 2, L = Ligand)The starting materials of the type RMn(CO)5-nLn und (C6H5)2 Hg react to the products of the type RCO(o-C6H4)Mn(CO)4-nLn[n = 0, R = Ch3, C2H5, C3H7, C6H5,CH2; R = C6H5, n = 1, L = E(C6H5)3, E = P, As, Sb; R = C6H5, n = 2, L = P(OR′)3, R′ = C6H5, CH3, C2H5, C3H7]. Steps of their complex reaction pathway are proposed. These orthometallated substances have been characterized by means of 1H-n.m.r., i.r. and u.v. spectroscopic measurements. The determination of the molecular structure of the two compounds RCO(o-C6H4)Mn(CO)3L [R = C2H5, L = CO; R = C6H5, L = As(C6H5)3] show that both contain a planar heterocyclic five-membered ring of the type .

Verbindungen vom Typ RMn(CO)5-nLn und (C6H5)2 Hg setzen sich zu Produkten des Typs RCO(o-C6H4)Mn(CO)4-nLn[n = 0, R = Ch3, C2H5, C3H7, C6H5,CH2; R = C6H5, n = 1, L = E(C6H5)3, E = P, As, Sb; R = C6H5, n = 2, L = P(OR′)3, R′ = C6H5, CH3, C2H5, C3H7] um. Für die Reaktanden werden Teilschritte für ihren komplexen Reaktionsablauf vorgeschlagen. Die Charakterisierung der Orthometallierungsprodukte erfolgt durch 1H-NMR-, IR- und UV-spektroskopische Meßergebnisse. Die Resultate der Einkristall-Röntgenstrukturbestimmungen von den beiden Verbindungen RCO(o-C6H4)Mn(CO)3L [R = C2H5, L = CO; R = C6H5, L = As(C6H5)3] zeigen, daß sie als zentrales Molekülfragment jeweils einen planaren heterozyklischen Fünfring besitzen.

2 Ill.

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