Abstract
The 1:1 reaction of ((C2H5) 4N) 2[fac-TcCl3 (CO) 3] with 2, 2'-bipyridine (bpy) gave fac-[TcCl (CO) 3 (bpy) ] ([1]). The complex [1] is characterized on the basis of electronic absorption and 1H NMR spectra along with single crystal X-ray analysis. The complex [1] crystallizes in the orthorhombic space group Pca21, with a=25.027 (3) Å, b=6.5327 (7) Å, c=16.679 (2) Å, V=2726.9 (6) Å, Z=8, and R=0.0320. In [1], Tc (I) ion is coordinated by three carbonyls with the facial positions, one chloride, and one bpy ligand. The metal-to-ligand charge transfer transition band was observed at 354 nm in CH3CN solution. The transition energy of the metal-to-ligand charge transfer band for [1] is somewhat larger than that for the Re congener.
