126929-23-5Relevant academic research and scientific papers
Technetium(III) complexes with the tetradentate umbrella ligand tris(o-mercaptophenyl)phosphite: X-ray structural characterization of Tc(P(o-C6H4S)3)(CNC3H7) and Tc(P(o-C6H4S)3)(CNC3H 7)2
De Vries, Nadine,Cook, Jessica,Jones, Alun G.,Davison, Alan
, p. 2662 - 2665 (2008/10/08)
Tris(o-mercaptophenyl)phosphinate (PS3) binds to Tc(III) as a tetradentate ligand to form the formally 14-electron complex Tc(PS3)(CNMe). An X-ray single-crystal structure determination of the isopropyl isocyanide derivative Tc(PS3)(CN-i-Pr) shows that the complex has a trigonal-bipyramidal geometry with the phosphorus and isonitrile carbon in the axial positions and the sulfurs bound in the equatorial plane (crystal data: MF = C22H19NPS3Tc, monoclinic, a = 10.3541 (8) ?, b = 13.2274 (6) ?, c = 16.437 (1) ?, β = 90.855 (6)°, space group P21/c, Z = 4; final R = 0.049, Rw = 0.057). In the presence of a large excess of isonitrile, these electron-deficient complexes bind a sixth ligand. The six-coordinate complex Tc(PS3)(CN-i-Pr)2, was also structurally characterized (crystal data: MF = C26H26N2PS3Tc, orthorhombic, a = 18.896 (1) ?, b = 13.2815 (8) ?, c = 10.3823 (6) ?, space group Pna21, Z = 4; final R = 0.044, Rw = 0.048).
