Barium, Potassium, and Tris(ethane-1,2-diamine)nickel(II) Fluoroalkanedisulfonates and the X-ray Crystal Structures of K2(O3S)2CHF, K2(O3S)2CF2, K2(O3S)2(CF2)3 · H2O, and [Nien3][(O3S)2(CF2)n] (n = 1, 3)

✍ Scribed by Carmel T. Abrahams; Rachel Blackshaw; Glen B. Deacon; Bryan M. Gatehouse; Gerald Henkel; Ralf Herkelmann; Ralf Jüschke; Anna Philosof; Petra Rieland; Peter Sartori

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: German
• Weight: 215 KB
• Volume: 626
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/1521-3749(200009)626:9<2012::aid-zaac2012>3.0.co;2-a

✦ Synopsis

The barium perfluoroalkanedisulfonates Ba(O 3 S) 2 (CF 2 ) n (n = 1, 3±5) and the new potassium fluoroalkanedisulfonates K 2 (O 3 S) 2 CHF, K 2 (O 3 S) 2 CF 2 , and K 2 (O 3 S) 2 (CF 2 ) 5 have been prepared by reaction of (CF 2 ) n (SO 2 F) 2 (n = 1, 3±5) or CHF(SO 2 F) 2 with CaO (or Ca(OH) 2 ) and M(OH) x (M = Ba, x = 2; M = K, x = 1) or with Ba(OH) 2 alone (n = 1) in water. In each of the crystal structures of K 2 (O 3 S) 2 CHF and K 2 (O 3 S) 2 CF 2 , there is an eight-coordinate and a six-coordinate potassium ion, whilst in K 2 (O 3 S) 2 (CF 2 ) 3 H 2 O, two different eight-coordinate potassium ions are linked by a bridging water molecule. One po-tassium has additionally six sulfonate oxygen and one fluorine donor atoms, and the other, five sulfonate oxygens and two fluorine donor atoms. The preparation of highly crystalline [Nien 3 ][(O 3 S)(CF 2 ) n ] (en = ethane-1,2-diamine; n = 1, 3±5) and the X-ray crystal structures for n = 1 or 3 provide evidence for the value of perfluoroalkanedisulfonate ions as counter ions for the crystallization of cationic complexes.