U. Jacobs, L. Schröder, W. Massa
Sep 1, 1998
Citations
0
Influential Citations
7
Citations
Journal
Zeitschrift für anorganische und allgemeine Chemie
Abstract
The crystal structures of three new diaqua-tetrafluoro-manganate(III) compounds with different organic N-cations have been determined: 2-picoH[MnF4(H2O)2] 1 (2-pico = 2-methyl-pyridine), space group P21/c, a = 9.439, b = 13.662, c = 7.641 A, β = 91.31°; R = 0.059; TMEDAH2[MnF4(H2O)2]22 (TMEDA = N,N,N′,N′-tetramethyl ethane diamine), space group P21/c, a = 5.421, b = 15.970, c = 9.677 A, β = 96.37°, R = 0.031, and TMBDAH2[MnF4(H2O)2]23 (TMBDA = N,N,N′,N′-tetramethyl-1,4-butane-diamine), space group P21/n, a = 12.631, b = 5.577, c = 12.976 A, β = 98.10°, R = 0.040. All three compounds show 2 D H-bonding networks of [MnF4(H2O)2]– anions separated by the organic cations. However, the topology of the anionic H-bonding nets is different for each compound. The anions are strongly elongated by the Jahn-Teller effect and are arranged in a ferrodistortive way in compounds 1 and 2, whereas in compound 3 the arrangement is described as in a herringbone-like antiferrodistortive variant. Variation der 2 D H-Bruckenbindungs-Topologie in Diaquatetrafluoromanganaten(III): 2-picoH[MnF4(H2O)2], TMEDAH2[MnF4(H2O)2]2 und TMBDAH2[MnF4(H2O)2]2 Die Kristallstrukturen von drei neuen Diaquatetrafluoromanganaten(III) mit verschiedenen organischen N-Kationen wurden bestimmt: 2-picoH[MnF4(H2O)2] 1 (2-pico = 2-Methyl-pyridin), Raumgruppe P21/c, a = 9,439, b = 13,662, c = 7,641 A, β = 91,31°; R = 0,059; TMEDAH2[MnF4(H2O)2]22 (TMEDA = N,N,N′,N′-Tetramethyl-ethylendiamin), Raumgruppe P21/c, a = 5,421, b = 15,970, c = 9,677 A, β = 96,37°, R = 0,031, und TMBDAH2[MnF4(H2O)2]23 (TMBDA = N,N,N′,N′-Tetramethyl-1,4-diaminobutan), Raumgruppe P21/n, a = 12,631, b = 5,577, c = 12,976 A, β = 98,10°, R = 0,040. Alle drei zeigen 2 D-Brucken-Netze aus [MnF4(H2O)2]–-Anionen, die durch die organischen Kationen separiert werden. Die Topologie der anionischen H-Brucken-Netze ist fur jede Verbindung unterschiedlich. Die Anionen sind durch den Jahn-Teller-Effekt stark gestreckt und zeigen ferrodistortive Ordnung in 1 und 2, jedoch eine fischgratartige antiferrodistortive Ordnungsvariante in 3.