Regioisomer-Dependent Endo- and Exocyclic Coordination of Bis-Dithiamacrocycles
摘要:
Syntheses of the regioisomers of bis-dithiamacrocycle and the regioisomer-controlled endo- and exocyclic coordination behaviors are reported. Direct bis-cyclization reaction of 1,2,4,5-tetra(bromomethyl)benzene with 3,6-dioxa-1,8-octanedithiol led to a mixture of two bis-dithiamacrocycle regioisomers (ortho-type; o-bis-L and meta-type; m-bis-L) which were separated by recrystallization and column chromatography. When the two isomers were reacted with AgPF6, o-bis-L gave an endocyclic one-dimensional (1-D) coordination polymer {[Ag-3(o-bis-L)(2)(CH3CN)](PF6)(3)center dot 2CH(3)CN} (1) with a 3:2 (metal-to-ligand) stoichiometry, while m-bis-L afforded an exocoordination-based 1-D polymeric complex {[Ag(m-bis-L)](PF6)}(n) (2) with a 2:2 stoichiometry. The observed endo- and exocoordination modes depending on the isomers were discussed in terms of the S center dot center dot center dot S distances in the bis-dithiamacrocycle isomers. Due to the closer S center dot center dot center dot S distance in each macrocyclic ring, o-bis-L is suitable for the endocoordination. However, m-bis-L forms an exocyclic complex because the S center dot center dot center dot S distance between two macrocyclic rings is shorter than that in one macrocyclic ring. NMR experiments also revealed that o-bis-L and m-bis-L form the endo- and the exocyclic complexes, respectively, in solution.
Ligand Isomer Effect on the Formations of Supramolecular Lead(II), Mercury(II), and Copper(II)/Mercury(II) Complexes of Bis-O<sub>2</sub>S<sub>2</sub>-Macrocycle
isomer effect on the coordination modes and topologies of the supramolecular complexes. Lead(II) perchlorate afforded an infinite one-dimensional (1-D) coordinationpolymer [Pb2(o-bis-L)(μ-ClO4)2(ClO4)2]}n (1) and a discrete complex [Pb2(m-bis-L)(CH3CN)2(H2O)2(ClO4)2](ClO4)2 (2), both of which are based on the endocyclic binuclear complexes mainly due to the oxophilicity of the lead(II) ion. Meanwhile
除了先前获得的bis-O 2 S 2-大环的邻位异构体(o -bis-L)和间位异构体(m- bis - L)外,新分离了其对位异构体(p- bis - L)。 ,并通过单晶X射线分析对完整的异构体系列进行结构表征。在复杂情况下,边界线(Pb 2+)和软边界线(Hg 2+和Cu +用金属盐研究异构体对超分子配合物配位模式和拓扑结构的影响。铅(II),高氯酸,得到一个无限的一维(1-d)的配位聚合物[铅2(ø -双-L )(μ-CLO 4)2(CLO 4)2 ]} Ñ(1)和一个分立络合物[Pb 2(m - bis - L)(CH 3 CN)2(H 2 O)2(ClO 4)2 ](ClO 4)2(2),两者均基于环内双核络合物,主要是由于铅(II)离子的亲氧性。同时,卤化汞(II)表现出环内双核络合物[Hg 2(o -bis-L)I 2 ] [Hg 3 I 8 ](3)和环外一维配位聚合物[Hg
Regioisomer-Dependent Endo- and Exocyclic Coordination of Bis-Dithiamacrocycles
作者:Arlette Deukam Siewe、Ja-Yeon Kim、Seulgi Kim、In-Hyeok Park、Shim Sung Lee
DOI:10.1021/ic402346z
日期:2014.1.6
Syntheses of the regioisomers of bis-dithiamacrocycle and the regioisomer-controlled endo- and exocyclic coordination behaviors are reported. Direct bis-cyclization reaction of 1,2,4,5-tetra(bromomethyl)benzene with 3,6-dioxa-1,8-octanedithiol led to a mixture of two bis-dithiamacrocycle regioisomers (ortho-type; o-bis-L and meta-type; m-bis-L) which were separated by recrystallization and column chromatography. When the two isomers were reacted with AgPF6, o-bis-L gave an endocyclic one-dimensional (1-D) coordination polymer [Ag-3(o-bis-L)(2)(CH3CN)](PF6)(3)center dot 2CH(3)CN} (1) with a 3:2 (metal-to-ligand) stoichiometry, while m-bis-L afforded an exocoordination-based 1-D polymeric complex [Ag(m-bis-L)](PF6)}(n) (2) with a 2:2 stoichiometry. The observed endo- and exocoordination modes depending on the isomers were discussed in terms of the S center dot center dot center dot S distances in the bis-dithiamacrocycle isomers. Due to the closer S center dot center dot center dot S distance in each macrocyclic ring, o-bis-L is suitable for the endocoordination. However, m-bis-L forms an exocyclic complex because the S center dot center dot center dot S distance between two macrocyclic rings is shorter than that in one macrocyclic ring. NMR experiments also revealed that o-bis-L and m-bis-L form the endo- and the exocyclic complexes, respectively, in solution.
Ligand-Induced Formation of Copper(I) Iodide Clusters: Exocyclic Coordination Polymers with Bis-dithiamacrocycle Isomers
A comparative study on the formation of guest clusters induced by different shapes (or sizes) of exocyclic binding sites embedded in the bis-macrocyclic host isomers is reported. CuI reacts with two regioisomers of a bis-dithiamacrocycle, o-bis-L (W-shaped binding site) and m-bis-L (U-shaped binding site), to yield one-dimensional coordination polymers [(μ4-Cu4I4)(o-bis-L)]·2CH3CN}n (1a) and [(μ4-Cu2I2)(m-bis-L)]n
据报道,由嵌入在双大环主体异构体中的不同形状(或大小)的环外结合位点诱导的客体簇形成的比较研究。发生反应的CuI与双- dithiamacrocycle,的两种区域异构体ø -双-L(W形结合位点)和米-双-L(U形结合位点),以产生一维配位聚合物[(μ 4 -的Cu 4我4)(ø -双-L)]·2CH 3 CN} ñ(1A)和[(μ 4 -Cu 2我2)(米-双-L)] ñ(2)。在图1A中,直径: -双-L异构体是由一个宽敞的立方烷联配体[铜4我4 ]簇,而米-双-L中的配体2是由更小的菱形连结物[Cu 2我2 ]由于簇不同的环外结合位点。观察到的结果说明了包含[Cu n I n ](n= 2或4)通过结合位点的交替或设计采用受控形式。由于形成的自适应团簇,产品显示出不同的光物理性质。此外,在环境条件下晶格溶剂分子损失后,观察到1a中一维链的滑动。