Cross-metathesis reactions of terminal olefins with acrylic esters catalyzed by a Ru–carbene complex ((H2IMes)(PCy3)Cl2RuCHPh, H2IMes = N,N-bis(mesityl)-4,5-dihydroimidazol-2-ylidene) were applied to the end-capping of [2]pseudorotaxanes composed of dibenzo[24]crown-8 (DB24C8) and ferrocenylmethylammonium derivatives as the macrocyclic and axle components. A [3]rotaxane consisting of two DB24C8s and an axle molecule having ferrocenyl groups at both ends was obtained from the cross-metathesis reaction of two [2]pseudorotaxanes with Fe(C5H4CH2OCOCHCH2)2. Cyclic voltammograms of the ferrocene-containing rotaxanes show reversible redox reactions whose potentials vary depending on the presence or absence of cationic dialkylammonium groups in the vicinity of the ferrocene units.
在 Ru-羰基复合物((H2IMes)(PCy3)Cl2RuCHPh,H2IMes = N,N-双(
甲苯甲基)-4、5-二氢
咪唑-2-亚基),用于由二苯并[24]冠-8 (DB24C8) 和
二茂铁甲基
铵衍
生物作为大环和轴组分组成的[2]伪罗他烷的端封。通过两个[2]假
二十八烷与 Fe(C5H4CH2OCOCHCH2)2 的交叉嵌合反应,得到了由两个 DB24C8 和一个两端带有
二茂铁基团的轴分子组成的[3]
二十八烷。含
二茂铁的轮烷的循环伏安图显示出可逆的氧化还原反应,其电位随
二茂铁单元附近阳离子二烷基
铵基团的存在与否而变化。