The author of 《Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect》 were Tian, Li Yan; Liu, Yuan Mei; Tian, Guang-Xuan; Wu, Xiang Hua; Li, Zhen; Kou, Jun-Feng; Ou, Ya-Ping; Liu, Sheng Hua; Fu, Wen-Fu. And the article was published in Dalton Transactions in 2014. Category: ethers-buliding-blocks The author mentioned the following in the article:
1,4-Disubstituted Ru-vinyl complexes, (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHArCH:CH)] (Ar = C6H2(OR)2, OR = (OCH2CH2)nOMe, n = 0-3), in which the 1,4-diethenylphenylene bridge bears two oligo(ethylene glycol)methyl ether side chains at different positions (2,5- and 2,3-positions), were prepared The resp. products were characterized by elemental analyses and NMR spectroscopy. The structures of complexes (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1b, n = 1; 2,5-positions) and (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1e, n = 0; 2,3-positions) were established by x-ray crystallog. The electronic properties of the complexes were studied by cyclic voltammetry, IR, and UV-visible/NIR spectroscopies. Electrochem. studies showed that the 2,5-substituents better stabilized the mixed-valence states; the electrochem. behavior was greatly affected by Li cations, especially for complex (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1g, n = 2) with 2,3-substituents, which was further supported by IR and UV-visible/NIR spectra changes. Spectroelectrochem. studies showed that the redox chem. was dominated by the noninnocent character of the bridging fragment. In the experimental materials used by the author, we found 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Category: ethers-buliding-blocks)
1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. Category: ethers-buliding-blocks They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem