The multidentate chemistry of manganese(II). IV. Non-charged complexes of linear quadridentate nitrogenous ligands and their reaction with oxygen

✍ Scribed by B Chiswell

• Book ID: 104139491
• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 735 KB
• Volume: 23
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)94745-5

✦ Synopsis

The preparation and properties of the non-charged manganese(H) compounds of formula [Mn(N4 &and)], in which (N&gand) is any one of twelve linear quadridentate nitrogeneous ligands derived from the interaction of adiketones and 2-pyridylhydrazones, are described. The structures of the compounds have been elucidated by reference to similar nickel(H) compounds and to magnetic moment studies. The reaction of these compounds with oxygen in COM pyridine solution has been studied in detail and it has been shown that each manganese atom combines with approx. 1.3 oxygen atoms. Reaction rates have been measured in some cases. This odd manganese to oxygen ratio is explained by the isolation from the oxygenation reactions of four products: (i) MnO,; (ii) Mn(N41igand)(py)OH; (iii) Mn(NJigand)(py)O,; (iv) Mn(N&gand)(p~))O or Mn(NJigand)(py)O 112;