BUILDING-BLOCK LIGANDS FOR NEW MOLECULAR CONDUCTORS - HOMOBIMETALLIC TETRATHIAFULVALENE TETRATHIOLATES AND METAL DISELENOLENES AND DITELLUROLENES

Important building block ligands such as 2-thioxo-1,3-dithiole-4,5-dit hiolate (dmit) and ethene-1,2-dithiolate (thiolene) form metal complex es that have been found to exhibit metallic conductivity and supercond uctivity. The syntheses of three well defined building block ligands t hat can lead to new molecular conductors and the synthesis and charact erization of four new metal complexes of these ligands are presented. The ligands are tetrathiafulvalene tetrathiolate (2), ethene-1,2-disel enolate (9) (diselenolene) and ethene-1,2-ditellurolate (6) (ditelluro lene); the metal complexes are a Ti complex, ((PrC5H4)-C-i)(2)Ti[S2TTF S2]Ti((PrC5H4)-C-i)(2) . 1.5C(6)H(6) (3), an Ni complex, (dppp)Ni[S2TT FS2]Ni(dppp) (4), a Pt-diselenolene complex, Pt(Se2C2H2)(PPh(3))(2) (1 0) and a Pt-ditellurolene complex Pt(Te2C2H2)(PPh(3))(2) (8). The X-ra y crystal structure of ((PrC5H4)-C-i)(2)Ti[S2TTFS2]Ti((PrC5H4)-C-i)(2) . 1.5C(6)H(6) (3) and its interesting chain-link fence crystal packin g are also presented. These ligands represent opportunities to produce a whole new class of molecular conductors.