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首页> 外文期刊>Bulletin of the Chemical Society of Japan >The Study of π-π Interaction in Layered [3.3] Orthocyclophanes. Charge-Transfer Complexes of [3.3] Orthocyclophanes with Tetracyanoethylene
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The Study of π-π Interaction in Layered [3.3] Orthocyclophanes. Charge-Transfer Complexes of [3.3] Orthocyclophanes with Tetracyanoethylene

机译:层状[3.3]邻苯二酚中π-π相互作用的研究。 [3.3]原环烷与四聚氨基乙烯的电荷转移络合物

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摘要

Dibenzo [3.3] orthocyclophanes ([3.3] COPs) with a bicyclo [4.4.1] undecane substructure form charge-transfer (C-T) complexes with tetracyanoethylene (TCNE). 3, 4:8. 9-Dibenzobicyclo [4.4.1] undecane (9) and its 11-methylene derivative 8 are flexible molecules and take a chair-boat conformation. Complexes 8- and 9-TCNE exhibit the absorption maximum at ca. 420 nm, which coincides with the value for the TCNE complex of o-xylene. On the other hand, acetal 5, methylcarbinol 6, and dimethylmethylene derivative 7 are rigid, layered [3.3] OCPs with stacked benzene rings. Compounds 5, 6, and 7 form a 1:1 complex with TCNE in solution. The absorption maxima of the complexes at ca. 500 nm suggest an enhanced C-T complexation due to a π-π through-space interaction in 5, 6, and 7. A 2:1 complex of rigid [3. 3] OCP 7 with TCNE crystallized from dichloromethane, while OCP 8 gave a red crystalline 2:3 complex with TCNE. X-ray crystallographic analyses of these two complexes is given.
机译:具有双环[4.4.1]十一烷亚结构的二苯并[3.3]原环烷([3.3] COP)与四氰基乙烯(TCNE)形成电荷转移(C-T)配合物。 3、4:8 9-二苯并双环[4.4.1]十一烷(9)及其11-亚甲基衍生物8是柔性分子,呈椅形结构。配合物8和9-TCNE在大约5℃处显示最大吸收。 420 nm,与邻二甲苯的TCNE配合物的值一致。另一方面,缩醛5,甲基甲醇6和二甲基亚甲基衍生物7是带有堆叠苯环的刚性层状[3.3] OCP。化合物5、6和7与TCNE在溶液中形成1:1的配合物。络合物的最大吸收量约为。 500 nm表示由于5、6和7中的π-π贯穿空间相互作用,增强了C-T络合。刚性的2:1络合物[3。 3]含有TCNE的OCP 7从二氯甲烷中结晶,而OCP 8则与TCNE产生红色的2:3晶体配合物。给出了这两种配合物的X射线晶体学分析。

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