作者:Zeynep Akgun、Hendrik Engelbrecht、Kuo-Hsien Fan、Charles Leslie Barnes、Cathy Sue Cutler、Silvia Sabine Jurisson、Susan Zemyan Lever
DOI:10.1039/c0dt00813c
日期:——
103Rhodium(III) complexes derived from seven acyclic tetradentate N2S2 ligands (one diaminedithiol and six diaminedithioether ligands) have been synthesized and characterized. Structural variations in the ligand include the length of carbon backbone between the coordinating atoms (222; 232; 323; 333), the presence or absence of gem-dimethyl groups α to sulfur, and the nature of the organic moiety on the sulfurs (hydrogen, p-methoxybenzyl and methyl). For each ligand, the formation of cis and/or trans dichloro isomeric complexes was assessed. Two complexes have been further characterized by single crystal X-ray diffraction. Preparation of the 103Rhodium(III) complexes was conducted and overall radiochemical yields, in vitro stability and log D7.4 values were measured. From these studies, the ligand with the 232 chain length, gem-dimethyl groups and the methyl thioether (L4) emerged as a preferred ligand for formation of rhodium complexes with trans geometry and highest radiochemical yields.
已合成并表征了源自七个无环四齿 N2S2 配体(一个二胺二硫醇和六个二胺二硫醚配体)的 103 铑(III)配合物。配体的结构变化包括配位原子(222;232;323;333)之间的碳主链长度、硫的α位偕二甲基基团的存在或不存在,以及硫上有机部分的性质(氢) 、对甲氧基苄基和甲基)。对于每种配体,评估了顺式和/或反式二氯异构体复合物的形成。通过单晶 X 射线衍射进一步表征了两种配合物。进行了 103Rhodium(III) 配合物的制备,并测量了总放射化学产率、体外稳定性和 log D7.4 值。从这些研究中,具有232链长、偕二甲基基团和甲基硫醚(L4)的配体成为形成具有反式几何形状和最高放射化学产率的铑络合物的优选配体。