Walawalkar, Mrinalini G. ; Murugavel, Ramaswamy ; Roesky, Herbert W. ; Uson, Isabel ; Kraetzner, Ralph (1998) Gallophosphonates containing alkali metal ions. 2. Synthesis and structure of gallophosphonates incorporating Na+ and K+ ions Inorganic Chemistry, 37 (3). pp. 473-478. ISSN 0020-1669
Full text not available from this repository.
Official URL: http://pubs.acs.org/doi/abs/10.1021/ic971441v
Related URL: http://dx.doi.org/10.1021/ic971441v
Abstract
The reactions between t-BuP(O)(OH)2and equimolar quantities of MGaMe4 (M = Na, K) yield ionic and alkali metal containing molecular gallophosphonates [Na4(μ2-OH2)2(THF)2][(Me2GaO3PBu-t)2]2·2THF (2) and [K(THF)6][K5(THF)2{(Me2GaO3PBu-t)2}3] (3), respectively. Compounds 2 and 3 are soluble in common organic solvents and have been characterized by means of analytical and spectroscopic techniques, as well as by single-crystal X-ray diffraction studies. These compounds represent the rare examples of molecular ionic phosphonate cages which contain coordinated Na+ or K+ ions. Compound 2 is constructed from two eight-membered Ga2O4P2 gallium phosphonate rings which sandwich a central Na4(H2O)2 unit. In the case of 3, three eight-membered Ga2O4P2 gallium phosphonate units envelope an aggregated K5 core which exists in the form of a trigonal-bipyramidal polyhedron. The Na+ and K+ ions in 2 and 3 are also coordinated by the endocyclic oxygen atoms of the eight-membered gallophosphonate crowns, apart from the regular exocyclic P-O coordination. Unlike the lithium gallophosphonate [Li4(THF)4][{(MeGaO3PBu-t)3(μ3-O2)}2] (1), compounds 2 and 3 do not undergo any clean cage conversion reaction in the presence of 15-crown-5 and 18-crown-6, respectively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 30431 |
| Deposited On: | 23 Dec 2010 03:03 |
| Last Modified: | 03 Mar 2011 09:41 |
Repository Staff Only: item control page
