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  • 1
    ISSN: 1434-4475
    Keywords: Keywords. Manganese; Pyridine; Nitrate; Complex.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung.  Ein Mixed-ligand-Komplex von Mangan(II)nitrat (Triaqua-trans-bis(3,4-dimethylpyridine)nitratomangan(II)nitrat, [Mn(3,4-dimethylpyridine)2(H2O)3(NO3)]NO3) wurde hergestellt und mittels spektroskopischer und kristallographischer Methoden charakterisiert. Die Verbindung kristallisiert im orthorhombischen System (Raumgruppe Pbca (Nr. 61), a=7.616(3), b=19.230(6), c=28.109(9) Å. Z=8) und besteht aus einem diskreten [MnL 2(NO3)(H2O)3]+-Kation und einem Nitratanion (L=3,4-Dimethylpyridin). Im Kation verbindet jedes Metallatom drei Wassermoleküle (Mn*O=2.148(5), 2.194(5) und 2.198(4) Å) und ist weiters jeweils mit einer Nitratgruppe (Mn*O=2.295(5) Å) und zwei 3,4-Dimethylpyridinmolekülen (Mn*N=2.247(5) und 2.289(5) Å) koordiniert. Das Gitter wird durch Stapelung der 3,4-Dimethylpyridingruppen verschiedener asymmetrischer Einheiten entlang der ac-Ebene und durch Wasserstoffbrückenbindungen entlang der b-Achse stabilisiert. Die IR- und ESR-Spektren werden diskutiert und mit der Struktur des Komplexes korreliert. Die thermische Zersetzung des festen Komplexes wurde in einer Stickstoffatmosphäre derivatographisch untersucht.
    Notes: Summary.  A mixed ligand complex of manganese(II) nitrate (triaqua-trans-bis(3,4-dimethylpyridine)nitratomanganese(II) nitrate, [Mn(3,4-dimethylpyridine)2(H2O)3(NO3)]NO3) has been synthesized and characterized by spectroscopic and crystallographic methods. The compound crystallizes in the orthorhombic system (space group Pbca (No. 61), a=7.616(3), b=19.230(6), c=28.109(9) Å, Z=8) and consists of a discrete cation [MnL 2(NO3)(H2O)3]+ and a nitrate anion (L=3,4-dimethylpyridine). In the cation, each metal atom links three water molecules (Mn*O=2.148(5), 2.194(5), and 2.198(4) Å) and is further coordinated to a nitrate group (Mn*O=2.259(5) Å) and two 3,4-dimethylpyridine molecules (Mn*N=2.247(5) and 2.289(5) Å). The lattice structure is stabilized by stacking of the 3,4-dimethylpyridine groups of different asymmetric units along the ac plane and by hydrogen bonding along the b axis. The IR and ESR spectra are reported and correlated with the structure of the complex. The thermal decomposition of the solid complex was investigated derivatographically in a nitrogen atmosphere.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two mixed ligand MnII complexes, namely trans- diazidotetrakis(pyrazole)manganese(II) (1) and trans-diaquadiazidobis(3,4-dimethylpyridine)manganese(II) (2) have been synthesized and characterized by spectroscopic and crystallographic methods. The i.r. and Raman spectra are reported and correlated with the structures of both complexes. The e.s.r. spectra of the solid complexes and their solutions are reported. Both complexes are monomeric, with distorted octahedral coordination and terminal azide. The thermal decomposition of both complexes was investigated derivatographically.
    Type of Medium: Electronic Resource
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