DIMERIC SILVER(I) COMPLEXES OF SOME ISOTHIAZOLE-BASED LIGANDS

A series of isothiazole-based potential ligands bearing substituents w ith additional donor sites in the 5-position of the heterocycle was sy nthesized [3-Me-5-R-C3HNS; R = CH=N(CH2)(2)py (1), CH=NCH(2)py (2), CH 2N(CH(2)CH(2)NEt(2))(2) (4), (CH2)(2)SMe (5)]. Upon reaction with AgO3 SCF3 they formed complexes [(1)AgOSO2CF3](2) (6), [(2)AgOSO2CF3](2) (7 ), [(4)Ag](2+)(2)(O3SCF3-)(2) (8) and [(5)AgOSO2CF3](2) (9), respectiv ely. 6, 8 and 9 were shown by X-ray structural analyses to consist of dimeric units L(2)Ag(2)(2+), either discrete (8), coordinated by termi nal CF3SO3- ligands (9) or Linked via bridging CF,SO, units (6). In 8 and 9 the isothiazole moiety is bonded to the metal center via the rin g-N. The coordination potential of the isothiazole heterocycle is disc ussed.