Titanium and manganese complexes supported by a xanthene-bridged bis(tripodal N2O2) ligand: isomerization, intramolecular hydrogen bonding and metal-binding ability
作者:Masakazu Hirotsu、Keisuke Kawamoto、Rika Tanaka、Yuji Nagai、Keiji Ueno、Yoshio Teki、Isamu Kinoshita
DOI:10.1039/c3dt51389k
日期:——
similar dimanganese(III,III) complex [Mn2(L)(OMe)2(MeOH)2] was synthesized from a 1 : 2 mixture of H4L and manganese(II) perchlorate in the presence of triethylamine. An X-ray analysis of [Mn2(L)(OMe)2(MeOH)2] revealed that two Mn-N2O4 octahedrons are connected by intramolecular hydrogen bonds as well as a xanthene bridge to form a C2 symmetrical structure. The dimanganese(III,III) complex further reacted
制备了新的双(N 2 O 2)配体L(4-),其中两个三脚架二胺-双(酚酸酯)部分被x吨骨架桥接。H4L与2当量的反应。[Ti(O(i)Pr)4]的生成二钛(IV,IV)络合物[Ti2(L)(O(i)Pr)4]的C2和Cs对称异构体。分离的C 2异构体通过Ti-N键裂解缓慢地转化为C s异构体,以形成平衡的3:2混合物。在三乙胺存在下,由H4L和高氯酸锰(II)的1:2混合物合成了类似的二锰(III,III)配合物[Mn2(L)(OMe)2(MeOH)2]。X射线分析[Mn2(L)(OMe)2(MeOH)2]显示,两个Mn-N2O4八面体通过分子内氢键和x吨桥连接以形成C2对称结构。二锰(III,III)配合物进一步与乙酸锰(II)反应,形成混合价的三锰铝(III,II,III)配合物[Mn3(L)(mu-OMe)2(mu-OAc)2]。三苯甲基(III,II,III)配合物的电化学数据表