A MOLECULAR APPROACH TO ORGANIC-SOLIDS - MOLECULAR RECOGNITION OF ARENE SULFONATES BY BIS-CYCLIC AMIDINIUM DICATIONS IN THE SOLID-STATE

Structural analysis of two bis-cyclic amidinium 1 and 2 tosylate salts were performed in the solid state. Whereas for 1-2TsOH (1 = 1,2-bis(2 '-tetrahydropyrimidyl)ethane) the dication was centrosymmetric, in the case of 2-2TsOH (2 = 1,2-bis(2'-dihydroglyoxalinyl)ethane) no element of symmetry was observed. in the solid state, the bis ammidinium moie ty of 1-2H(+) displayed molecular recognition of the tosylate anion by bridging in a centrosymmetric fashion two of the latter by two sets o f two strong hydrogen bonds.