Kula, S. et al. published their research in Synthetic Metals in 2019 | CAS: 13669-10-8

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.COA of Formula: C9H10O3S

An electrochromic behavior of novel polythiophenes obtained from unsymmetrical monomers- a comprehensive study was written by Kula, S.;Szlapa-Kula, A.;Krompiec, S.;Gancarz, P.;Filapek, M.. And the article was included in Synthetic Metals in 2019.COA of Formula: C9H10O3S This article mentions the following:

The paper contains a comprehensive study regarding the synthesis and properties of novel polythiophenes, where bithiophene units are linked by phenylene bridges. In this work, four tetrasubstituted benzene monomers were synthesized with yields ranging from 41% to 69% by the cycloaddition reaction of [2 + 2 + 2]. 5-ethynyl-2,2′-bithiophene and appropriate β-ketoester were used as the substrates. Obtained compounds were designed so that the mol. was asym., i.e. possessing electron-withdrawing substituent (COOEt) in position 2, whereas in the 3rd position there were acceptor substituents. This provides a non-uniform electron d. distribution within the mol., which in turn should provide for the difference in oxidation potential of the individual bithiophene fragments. The influence of this architecture on the stability, electrochem. and electrochromic behavior was thoroughly studied. The polymers present a good stability during multiple p-doping. The exptl. results were also investigated theor., using DFT approach. Calculations of the frontier orbital energies and the corresponding Eg value were done for each polymer, by means of periodic boundary conditions. Furthermore, obtained polymers exhibit multistep electrochromism. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8COA of Formula: C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.COA of Formula: C9H10O3S

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