Study on the formation of mixed ligand oxorhenium and oxotechnetium complexes (SNS/S combination)
作者:Minas Papadopoulos、Ioannis Pirmettis、Charalabos Tsoukalas、Berthold Nock、Theodosia Maina、Catherine P. Raptopoulou、Hans-Juergen Pietzsch、Matthias Friebe、Hartmut Spies、Bernd Johannsen、Efstratios Chiotellis
DOI:10.1016/s0020-1693(99)00262-5
日期:1999.11
Theoretically, several complexes can be formed during the reaction between the tridentate aminedithiol ligand EtN(CH 2 CH 2 SH) 2 , L1H 2 , the monodentate thiol p -ClC 6 H 4 SH, L2H, and the Re V OCl 3 (PPh 3 ) 2 . Three main possibilities are: (i) neutral mixed ligand complexes ReOL1L2, the syn isomer, complex 1 and the anti isomer, complex 2 ; (ii) binuclear complex of the tridentate ligand, (ReO) 2 (L1)
从理论上讲,三齿胺二硫醇配体EtN(CH 2 CH 2 SH)2,L1H 2,单齿硫醇p -ClC 6 H 4 SH,L2H和Re V OCl 3(PPh 3 )2。三种主要可能性是:(i)中性混合配体复合物ReOL1L2,顺式异构体,复合物1和反式异构体,复合物2;(ii)三齿配体的双核络合物,(ReO)2(L1)3,络合物3,以及(iii)单硫醇[ReO(L2)4]-的阴离子络合物,络合物4。当使用比例为1/1的L1H 2 / L2H的混合物时,反应的主要产物为顺式异构体1。还分离出少量的抗异构体2(在上述反应条件下形成产率3和4)。氧or络合物3和4是通过L1H 2或L2H分别与前体ReOCl 3(PPh 3)2反应合成的。1、3和4的晶体结构是通过X射线晶体学确定的。通过使用99m Tc-葡庚糖酸酯作为前体的交换反应已经制备了相应的99m Tc络合物。类似地,主要反应产物是顺式异构