| 16671806 |
Northrop BH, Khan SJ, Stoddart JF: Kinetically controlled self-assembly of pseudorotaxanes on crystallization. Org Lett. 2006 May 11;8(10):2159-62.
[reaction: see text] Mixing of equimolar amounts of cyclobis (paraquat-p-phenylene) (CBPQT (4+)) with a bis-4-methylphenyl ether (MPE twice) of a 1,5-dioxynaphthalene (DNP) derivative in MeCN/CH (2) Cl (2) (3:1) results in the formation of a [2] pseudorotaxane which, on crystallization, yields a [4] pseudorotaxane in the solid state that is stabilized by multiple [C-H...F] interactions: a mixture of the same components in a 1:3 ratio affords a crystalline [2] pseudorotaxane after vapor diffusion of methyl-tert-butyl ether into a solution of these components in MeCN/CH (2) Cl (2) (3:1). |
31(0,1,1,1) |