Variation of 2 D Hydrogen Bond Topology in Diaqua-tetrafluoromanganates(III): 2-picoH[MnF4(H2O)2], TMEDAH2[MnF4(H2O)2]2, and TMBDAH2[MnF4(H2O)2]2

✍ Scribed by Ute Jacobs; Ludger Schröder; Werner Massa; Carlos Elías; Jesús Fuentes; Pedro Núñez; Ursula Bentrup

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: German
• Weight: 281 KB
• Volume: 624
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(199809)624:9<1471::aid-zaac1471>3.0.co;2-h

✦ Synopsis

The crystal structures of three new diaqua-tetrafluoro-manganate(III) compounds with different organic Ncations have been determined: 2-picoH[MnF 4 (H 2 O) 2 ] 1 (2pico = 2-methyl-pyridine), space group P2 1 /c, a = 9.439, b = 13.662, c = 7.641 A Ê , b = 91.31°; R = 0.059; TME-DAH 2 [MnF 4 (H 2 O) 2 ] 2 2 (TMEDA = N,N,N',N'-tetramethyl ethane diamine), space group P2 1 /c, a = 5.421, b = 15.970, c = 9.677 A Ê , b = 96.37°, R = 0.031, and TMBDAH 2 [MnF 4 (H 2 O) 2 ] 2 3 (TMBDA = N,N,N',N'-tetramethyl-1,4-butane-diamine), space group P2 1 /n, a = 12.631, b = 5.577, c = 12.976 A Ê , b = 98.10°, R = 0.040. All three compounds show 2 D H-bonding networks of [MnF 4 (H 2 O

) 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.