Ma, Jingxiang’s team published research in Journal of Inorganic and Organometallic Polymers and Materials in 2012 | CAS: 74029-40-6

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. Product Details of 74029-40-6 The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.

《New molecular wires with two ferrocene hinges [Erratum to document cited in CA150:77763]》 was published in Journal of Inorganic and Organometallic Polymers and Materials in 2012. These research results belong to Ma, Jingxiang; Vollmann, Marc; Menzel, Henning; Pohle, Sven; Butenschoen, Holger. Product Details of 74029-40-6 The article mentions the following:

On page 48, the 1H NMR and HRMS data for compound 17 contained errors; the corrected data are given. The experimental process involved the reaction of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Product Details of 74029-40-6)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. Product Details of 74029-40-6 The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem