Cyclic Hexamer with a Cubic Cavity: Crystal Structure of [{Rh(6-Purinethione Ribosido)(Cp*)}6](CF3SO3)6

: The stereoselective formation of a pseudo-S6 hexamer resulted from the self-assembling reaction between [Rh(Cp*)(H2 O)3 ]2+ and 6-purinethione riboside (see left structure; Cp*=C5 Me5 ). The schematic representation (right) shows the direction of the coordination to the S6 and N(7) donor atoms. C (clockwise) and A (anticlockwise) indicate the chirality of each unit complex.