CRYSTAL-STRUCTURE OF THE COORDINATION POLYMER [CO(BIPY)(1.5)(NO3)(2)]CENTER-DOT-CS2 (BIPY = 4,4'-BIPYRIDINE), A NEW MOTIF FOR A NETWORK SUSTAINED BY T-SHAPE BUILDING-BLOCKS

The crystal structure of the coordination polymer [Co(bipy)(1.5)(NO3)( 2)]. 1 (bipy = 4,4'-bipyridine), reveals that, if crystallized in the presence of CS2, it exists as a novel two-dimensional bilayer motif. T his is in contrast to what might have been expected since a one-dimens ional molecular-ladder motif is exhibited by 1 when crystallized in th e presence of MeCN or CHCl3. A molecule of CS2 is clathrated inside th e bilayer via what appear to be C-H ... S hydrogen bonds from 4,4'-bip yridine ligands. Adjacent bilayers pack efficiently in a gear-like fas hion. The existence of this new structural supramolecular isomer is ra tionalized on the basis of a template effect from the CS2 guest molecu le.