Crystal structure of a giant supramolecule encapsulating o-carborane

Abstract

A giant quasi-spherical supramolecule [{Cp*Fe(η 5 -P 5 )} 12 (CuBr) 18.8 ] encapsulating o-carborane was prepared by the reaction between CuBr and [Cp*Fe(η 5 -P 5 )] (Cp* = pentamethylcyclopentadienyl) and structurally characterized. The crystal structure can be treated as solid solution of various [(Cp*Fe(η 5 -P 5 )) 12 (CuBr) n ] supramolecules with n = 18-20. Two crystals obtained from different syntheses differ in the location of vacant CuBr positions and solvent molecules. Surprisingly, the supramolecules are packed following the low-density reo (ReO 3 ) packing.

Anionic Hosts for the Incorporation of Cationic Guests

“…Such a partly vacant (80− n ) vertex host molecule containing CuBr in its core was already observed once when o ‐carborane was encapsulated (Figure a) . Furthermore, the known Cl‐derivative of this sphere is capable of the trapping of several templates such as o ‐carborane, [CpCr(η 5 ‐As 5 )] and [FeCp 2 ], although crystallizing in the cubic crystal system.…”

Giant pentaphosphaferrocene-based supramolecules as molecular containers

“…Alexander V. Virovets 1,2 , Eugenia V. Peresypkina 1,2 An inorganic analogue of ferrocene, pentaphosphaferrocene, [Cp R Fe(η 5 -P 5 )] (Cp R = η 5 -C 5 R 5 , R = Me (Cp*), CH 2 Ph (Cp Bn ), PhC 4 H 9 (Cp BIG )), is able to coordinate Cu + and Ag + cations resulting in either coordination polymers or in giant supramolecules [1][2][3][4][5][6][7]. The self-assembled supramolecules of 2.1 -4.6 nm in diameter can be isolated in high yields using special crystallization technique.…”

New polynuclear Re-M cyanide complexes (M = Cu, Ag)

“…Since 2002, we have being systematically investigating an inorganic analogue of ferrocene, pentaphosphaferrocene, [Cp R Fe(η 5 -P 5 )] (Cp R = η 5 -C 5 R 5 , R = Me (Cp*), CH 2 Ph (Cp Bn ), PhC 4 H 9 (Cp BIG )). It showed an unprecedented ability to assemble in giant supramolecules [1][2][3][4][5][6][7] when reacted to Cu(I) halides (X = Cl, Br, I). These supramolecules reach 2.1-4.6 nm in size and can be isolated in astonishingly high yields.…”