Kheradmandan, S; Schmalle, H W; Jacobsen, H; Blacque, Olivier; Fox, T; Berke, Heinz; Gross, M; Decurtins, S (2002). An unusual (10,3)-a racemic twofold interpenetrating network assembled from isolable tris(cyclopentadienyl)manganate and cesocene building blocks. Chemistry - A European Journal, 8(11):2526-2533.
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The syntheses and X-ray crystal structures of [(crown-6)2Cs](+)-[Cp3Mn]- (1), [(crown-6)2Cs](+)-[Cp'3Mn]- (2), [CsCp'] (3), [(CsCp')2-(crown-6)] (4), and Cs[MnCp3] (5), and the synthesis of Cs[MnCp'3] (6) are reported (Cp' = C5H4Me). The anions [Cp3Mn]- (1-) and [Cp'3Mn]- (2-) are characterized by eta 2 coordination of all three Cp or Cp' rings. Measurements of the magnetic susceptibilities chi M resulted in values of mu eff = 6.20 microB (300 K), mu eff = 6.33 microB (301 K), and mu eff = 5.83 microB (300 K) for 1, 2, and 5, respectively, which are indicative of high-spin d5-Mn2+ centers. Density functional calculations illustrate that the coordination mode of 1- is characteristic for its sextet electronic ground state. Compound 3 forms infinite chains of cesocene-type sandwiches in the solid state, which are broken up into small subunits by the addition of crown ether to form 4. Compound 5 is a rare example of a (10,3)-a racemic interpenetrating network that crystallizes in the orthorhombic space group Pbca.
|Item Type:||Journal Article, refereed|
|Communities & Collections:||07 Faculty of Science > Department of Chemistry|
|Date:||3 June 2002|
|Deposited On:||11 Feb 2008 12:25|
|Last Modified:||28 Nov 2013 01:23|
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