Month: January 2023

Steroidal Wheel-and-Axle Host Type Molecules: Insights from Awkward Shape, Conformation, Z’ > 1 and Packing was written by Ramirez-Montes, Pedro I.;Ochoa, Maria E.;Santillan, Rosa;Ramirez, Daniel J.;Farfan, Norberto. And the article was included in Crystal Growth & Design in 2014.Safety of 1,2-Difluoro-3-iodobenzene This article mentions the following:

The synthesis and crystal structure of three new mol. rotors I,II,III , derived from levonorgestrel and norethisterone are reported. The conformation, close contacts, and shape characteristics of these mols. exhibiting Z’ = 2 and the inclusion of solvent mols. were analyzed together with the crystal structures of parent mols. retrieved from the Cambridge Structural Database. For the set of estranes studied, we confirmed that whenever an alternative conformer cannot satisfy the crystallog. symmetry, a second mol. is incorporated in the asym. unit resulting in conformational isomorphism (Z’ > 1). The shape of these mols. could make them interesting as potential hosts. In the experiment, the researchers used many compounds, for example, 1,2-Difluoro-3-iodobenzene (cas: 64248-57-3Safety of 1,2-Difluoro-3-iodobenzene).

1,2-Difluoro-3-iodobenzene (cas: 64248-57-3) belongs to iodide derivatives. Organic iodides are widely used in organic synthesis. Halogenation of aromatic hydrocarbons is a very important reaction via an electrophilic aromatic substitution. Alkyl iodides react at a faster rate than alkyl fluorides due to the weak C-I bond.Safety of 1,2-Difluoro-3-iodobenzene

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Substituent Effect on the Optoelectronic Properties of Alternating Fluorene-Cyclopentadithiophene Copolymers was written by Pal, Bikash;Yen, Wei-Che;Yang, Jye-Shane;Chao, Chi-Yang;Hung, Ying-Chieh;Lin, Shiang-Tai;Chuang, Chia-Hao;Chen, Chun-Wei;Su, Wei-Fang. And the article was included in Macromolecules (Washington, DC, United States) in 2008.COA of Formula: C9H4I2OS2 This article mentions the following:

A novel series of soluble alternating conjugated copolymers, comprised of 9,9-dihexylfluorene and cyclopentadithiophenes (P1-P5), were synthesized via Pd-catalyzed Suzuki coupling reaction in good yields. The UV-vis absorption spectra, fluorescence spectra, fluorescence quantum yields, and cyclic voltammograms of P1-P5 are also reported. The P2 and P3 with electron-donating non-π-substituents (ethylenedioxy and propylenedioxy bridges the 3,3-positions of the thiophene groups) display high fluorescence quantum yields and red-shifted absorption as compared with nonsubstituted P1. However, the P4 and P5 are weakly fluorescent and exhibit blue-shifted absorption which are due to the presence of electron-withdrawing π-substituents (carbonyl and dicyanoethenyl). The behavior of P4 and P5 can be attributed to the significant electronic coupling between the π-substituents and the conjugated polymer backbone that leads to a less allowed optical transition between the ground and the lowest excited state, resembling the meta conjugation effect in phenylene-derived conjugated π-systems. This argument is supported by MO distribution calculations In the experiment, the researchers used many compounds, for example, Bis(2-iodothiophen-3-yl)methanone (cas: 474416-61-0COA of Formula: C9H4I2OS2).

Bis(2-iodothiophen-3-yl)methanone (cas: 474416-61-0) belongs to iodide derivatives. Iodide-containing intermediates are common in organic synthesis, because of the easy formation and cleavage of the C–I bond. Polyiodoorganic compounds are sometimes employed as X-ray contrast agents, in fluoroscopy, a type of medical imaging. This application exploits the X-ray absorbing ability of the heavy iodine nucleus.COA of Formula: C9H4I2OS2

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com