5,5′-(Ethyne-1,2-diyl)diisophthalic acid dimethyl sulfoxide tetrasolvate was written by Muench, Alexander S.;Katzsch, Felix;Weber, Edwin;Mertens, Florian O. R. L.. And the article was included in Acta Crystallographica, Section E: Structure Reports Online in 2013.Name: Dimethyl 5-ethynylisophthalate This article mentions the following:
In the title compound, C18H10O8·4C2H6OS, the mid-point of the triple bond of the main mol. is located on a special position, i.e. about an inversion center. The carboxyl groups are twisted slightly out of the planes of the aromatic rings to which they are attached, making dihedral angles of 24.89(1) and 7.40(2)°. The crystal packing features strong O-H···O H bonds, weaker C-H···O interactions and O···S contacts [3.0981(11) Å] and displays channel-like voids extending along the a-axis direction which contain the DMSO solvent mols. Crystallog. data and at. coordinates are given. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5Name: Dimethyl 5-ethynylisophthalate).
Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Name: Dimethyl 5-ethynylisophthalate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics