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Synthesis and structural characterization of neutral “3 + 2” oxorhenium and oxotechnetium complexes of the 2-mercaptoethyl-N-glycine (SNO)/2,2′-bipyridine (NN) mixed ligand system |
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| Authors: | Dionysia Papagiannopoulou Ioannis Pirmettis Dimitri Komiotis Dimitra Benaki Aris Terzis |
| Institution: | a School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece b Institute of Radioisotopes-Radiodiagnostic Products, National Centre for Scientific Research “Demokritos”, 15310 Ag. Paraskevi, Athens, Greece c Institute of Biology, National Centre for Scientific Research “Demokritos”, 15310 Ag. Paraskevi, Athens, Greece d Department of Biochemistry and Biotechnology, University of Thessaly, 41221 Larissa, Greece e Institute of Materials Science, National Centre for Scientific Research “Demokritos”, 15310 Ag. Paraskevi, Athens, Greece |
| Abstract: | Neutral, hexacoordinated “3 + 2” mixed ligand oxorhenium (1) and oxotechnetium (2) complexes of the general formula MOSNO]NN], where M = Re or 99Tc, SNO is 2-mercaptoethyl-N-glycine and NN is 2,2′-bipyridine (bpy), were synthesized by simultaneous action of the tridentate SNO and the bidentate NN ligand on ReOCl3(PPh3)2 or 99TcO-gluconate precursors in a 1:1:1 molar ratio. Both complexes were characterized by elemental analysis, IR and NMR spectroscopy. X-ray structure determination of rhenium complex 1 revealed a distorted octahedral coordination geometry where the SNO donor atoms of the tridentate ligand and one bpy nitrogen atom occupy the equatorial positions of the octahedron, whereas the second bpy nitrogen atom and the oxo-group fill the apical positions. |
| Keywords: | Rhenium Technetium Mixed ligand complexes Crystal structures |
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