PREPARATION, CRYSTAL-STRUCTURE AND PROPERTIES OF (PH4P)(2)RECL6-CENTER-DOT-2CH(3)CN

(Ph4P)(2)ReCl6. 2CH(3)CN 1 crystallizes as colourless single crystals from the acetonitrile solution of (Ph4P)(2)ReCl6 in ether. The crystal s are monoclinic in space group P2(1)/c with unit cell constants of a = 9.550(1) Angstrom; b = 19.724(3) Angstrom; c = 15.033(2) Angstrom; b eta = 84.5(1)degrees; V= 2801.1(7) Angstrom(3); Z= 2. In the octahedra l anion the Re-Cl bond lengths are 2.368 Angstrom in average. The FIR region indicates two deformation bands delta(Cl-Re-Cl) at 162 cm(-1) ( F-2g) and 175 cm(-1) (F-1u) and stretching band v(Re-Cl) at 309 cm(-1) (F-1u). For 1 very weak antiferromagnetic super-exchange is observed; the effective magnetic moment at room temperature is 3.57 B.M.