Counter-ion modulation of long-distance pi-bonding of the open-shell p-benzoquinone anions.

X-Ray crystallography of dichlorodicyano- or tetrachloro-p-benzoquinone salts with polyether-ligated alkali metals reveals discrete supramolecular complexes: [{M(L)A}(2)]. They show pairs of co-facial p-benzoquinone anions (A(-)) arranged at close interplanar separation: r(pi) approximately 2.9 A characteristic of ion-radical pi-dimers.

Halogen-bonded assembly of hybrid inorganic/organic 3D-networks from dibromocuprate salts and tetrabromomethane.

The critical halogen-bonding motif (CBr...

Tris(thianthrene)2+ bis(dodecamethylcarba-closo-dodecaborate) dichloromethane tetrasolvate: a crossed triple-decker pi-trimer dication.

The title compound, (3C(12)H(8)S(2))(2+).2C(13)H(36)B(11)(-).4CH(2)Cl(2), contains an unusual cation-radical association comprising a pi-trimer dication of crossed thianthrenes.