An N8O6 cryptand: the host for AgCguests and H2O molecules

A silver complex [Ag2L](SbF6)2(DMF)2 (1) and a multi-protonated complex [H4L$2H2O]4C$4ClK$8H2O (2) of an N8O6 cryptand L were synthesized and characterized. L in the complexes is formulated C60H78N8O6 and is the N8O6 reduced polyaza-oxa cryptand containing not only nitrogen donors but also oxygen atoms. The conformations of L in the two complexes are endo–endo with the longest distances between the two bridge-head nitrogen donors (19.597(8) for 1 and 18.347(4) A° for 2) in the reported polyaza or polyaza-oxa cryptands. q 2004 Elsevier B.V. All rights reserved.