The structure of N-methylbenzothiazole-2-selone dichloride: a novel ‘zipper’ arrangement of T-shaped molecules linked via intermolecular Cl–Cl contacts

The cubane-type cation [{Ru(η6-C6H6)(μ3-OH)}4]4+ (1) exhibits a tetrahedrally arranged set of four strong hydrogen bond donor groups but has essentially no hydrogen bond acceptor properties. As a result counter anions with even weak hydrogen bond acceptor properties must exhibit a tetrahedral arrangement about the cation. In the case of anions able to non-covalently bridge between pairs of cations (e.g. dianions) this will result in a diamondoid lattice.