Lu, Xinhua et al. published their research in Zeitschrift fuer Kristallographie – New Crystal Structures in 2018 | CAS: 313648-56-5

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. HPLC of Formula: 313648-56-5

Crystal structure of tetramethyl 5,5′-(buta-1,3-diyne-1,4-diyl)diisophthalate, C24H18O8 was written by Lu, Xinhua;Hu, Jin;Zhu, Caixia. And the article was included in Zeitschrift fuer Kristallographie – New Crystal Structures in 2018.HPLC of Formula: 313648-56-5 This article mentions the following:

C24H18O8, monoclinic, P21/n (number 14), a = 3.9930(7) Å, b = 26.483(5) Å, c = 10.3307(19) Å, β = 98.136(4)°, V = 1081.5(3) Å3, Z = 2, Rgt(F) = 0.0606, wRref(F2) = 0.1986, T = 293(2) K. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5HPLC of Formula: 313648-56-5).

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. HPLC of Formula: 313648-56-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics