Structural studies on encapsulation of tetrahedral and octahedral anions by a protonated octaaminocryptand cage.

ABSTRACT: Structural aspects of the binding of inorganic anions such as perchlorate, hydrogen sulfate, and hexafluorosilicate with the proton cage of octaaminocryptand L(1), N(CH(2)CH(2)NHCH(2)-p-xylyl-CH(2)NHCH(2)CH(2))(3)N), are examined thoroughly. Crystallographic results for a hexaprotonated perchlorate complex of L(1), [(H(6)L(1))(6+)(ClO(4) (-))]5(ClO(4) (-)).11H(2)O.CH(3)CN (1), an octaprotonated hydrogen sulfate complex of L(1), [(H(8)L(1))(8+)(HSO(4) (-))]7(HSO(4) (-)).3H(2)O.CH(3)OH (2) and an octaprotonated fluorosilicate complex of L(1), [(H(8)L(1))(8+)(HSiF(6) (-))]3(SiF(6) (2-)).(HSiF(6) (-)).15H(2)O (3), show encapsulation of one perchlorate, hydrogen sulfate and hexafluorosilicate, respectively inside the cage of L(1) in their protonated states. Further, detailed structural analysis

SUBMITTER: Ravikumar I 

PROVIDER: S-EPMC2779740 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature