Cyclam as a supramolecular synthon: infinite stacked arrays to encapsulation in superanions

Abstract

Cyclam crystallised from CHCl₃–hexane gives infinite, hydrogen bonded assembled columns; in acidic aqueous media (pH 2) in the presence of sodium p-sulfonatocalix[4]arene and the dichromium(III) aqua ion, the superanion or ionic capsule [[H₄(cyclam)]⁴⁺ ⊂ {(p-sulfonatocalix[4]arene^4–)₂}]^4– crystallises as the salt of [Cr₂(OH)₂(H₂O)₈]⁴⁺.

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