61 Helices from Tetrahedral Ribbons 1∞[BP2O83-: Isostructural Borophosphates MIM
II(H2O)2[BP2O8] · H2O (MI = Na, K; MII = Mg, Mn, Fe, Co, Ni, Zn) and Their 
Dehydration to Microporous Phases MIMII(H2O)[BP2O8]

Kniep, Rüdiger; Will, Horst Günter; Boy, Insan; Röhr, Caroline

doi:10.1002/anie.199710131

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6₁ Helices from Tetrahedral Ribbons ₁^∞[BP₂O₈^3-: Isostructural Borophosphates M^IM^II(H₂O)₂[BP₂O₈] · H₂O (M^I = Na, K; M^II = Mg, Mn, Fe, Co, Ni, Zn) and Their Dehydration to Microporous Phases M^IM^II(H₂O)[BP₂O₈]

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Kniep, R., Will, H. G., Boy, I., & Röhr, C. (1997). 6₁ Helices from Tetrahedral Ribbons ₁^∞[BP₂O₈^3-: Isostructural Borophosphates M^IM^II(H₂O)₂[BP₂O₈] · H₂O (M^I = Na, K; M^II = Mg, Mn, Fe, Co, Ni, Zn) and Their Dehydration to Microporous Phases M^IM^II(H₂O)[BP₂O₈]. Angewandte Chemie International Edition, 36(9), 1013-1014. doi:10.1002/anie.199710131.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-BE0C-0

Abstract

Together with the MI ions, the tetrahedral ribbons of the title compounds form double helices, the central channels of which are filled with water helices (see picture). Coordination octahedra MIIO4(H2O)2 link the spiral ribbons, which run parallel to one another. Partial dehydration of the title compounds leads to microporous phases with channeled structure and is reversible in the sense of a topochemical reaction.