Month: October 2022

《Crystal structures of [(μ2-L1)dibromidodicopper(II)] dibromide and poly[[(μ2-L1)diiodidodicopper(I)]-di-μ-iodido-dicopper(I)], where L1 is 2,5,8,11,14,17-hexathia-[9.9](2,6,3,5)-pyrazinophane》 was published in Acta Crystallographica, Section E: Crystallographic Communications in 2020. These research results belong to Assoumatine, Tokoure; Stoeckli-Evans, Helen. SDS of cas: 7789-45-9 The article mentions the following:

The reaction of the hexathiapyrazinophane ligand, 2,5,8,11,14,17-hexathia-[9.9](2,6,3,5)-pyrazinophane (L1), with copper(II) dibromide led to the formation of a binuclear complex, [μ2-2,5,8,11,14,17-hexathia-[9.9](2,6,3,5)-pyrazinophane]bis[bromidocopper(II)] dibromide, [Cu2Br2(C16H24N2S6)]Br2, (I). The complex possesses inversion symmetry with the pyrazine ring being situated about a center of symmetry. The ligand coordinates to the copper(II) atom in a bis-tetradentate manner and the copper atom has a fivefold NS3Br coordination environment with a distorted shape. The reaction of ligand L1 with copper(I) iodide also gave a binuclear complex, which is bridged by a Cu2I2 unit to form a two-dimensional coordination polymer, poly[[μ2-2,5,8,11,14,17-hexathia-[9.9](2,6,3,5)-pyrazinophane]tetra-μ-iodido-tetracopper(I)], [Cu4I4(C16H24N2S6)]n, (II). The binuclear unit possesses inversion symmetry with the pyrazine ring being located about a center of symmetry. The Cu2I2 unit is also located about an inversion center. The two independent copper(I) atoms are both fourfold coordinate. That coordinating to the ligand L1 in a bis-tridentate manner has an NS2I coordination environment and an irregular shape, while the second copper(I) atom, where L1 coordinates in a bis-monodentate manner, has an SI3 coordination environment with an almost perfect tetrahedral geometry. In the crystal of I, the cations and Br- anions are linked by a number of C-H···S and C-H···Br hydrogen bonds, forming a supramol. network. In the crystal of II, the two-dimensional coordination polymers lie parallel to the ab plane and there are no significant inter-layer contacts present. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9SDS of cas: 7789-45-9)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.SDS of cas: 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Formula: Br2CuIn 2019 ,《A semiconducting organic-inorganic hybrid ([BrCH2CH2N(CH3)3]2+[CuBr4]2-) with switchable dielectric properties derived from an unusual piston-like displacive movement》 was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices. The article was written by Sui, Yan; Zhong, Ye-Shun; Wang, Jing-Jing; Xia, Qin; Wang, Liang-Jun; Liu, Dong-Sheng. The article contains the following contents:

According to quasi-spherical theory, structural modifications of spherical organic components are useful in obtaining ferroelec. or switchable dielec. organic-inorganic hybrid compounds, but how to tailor the spherical organic components is still unclear. In the current work, a prototype spherical Me4N+ cation was modified by replacing one of its H atoms with a CH2Br group, rather than with the widely studied Br atom, to obtain a new organic-inorganic hybrid compound, [BrCH2CH2NMe3]2+[CuBr4]2- (BETABCuBr). The structure, phase transition, and dielec. and optical properties of BETABCuBr were carefully characterized. Based on these results, BETABCuBr was indicated to undergo a reversible phase transition at ∼356 K, mainly due to a piston-like displacive movement of its Cu atom. The extension of the C chain was concluded to lead to a change of the phase transition mechanism from the typical order-disorder movement to an unusual displacive movement. The authors expect the results of this work to contribute to the exploration of new types of phase transition materials. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9Formula: Br2Cu)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Formula: Br2Cu

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

In 2019,Proceedings of the National Academy of Sciences of the United States of America included an article by Bates, Morgan W.; Lequieu, Joshua; Barbon, Stephanie M.; Lewis, Ronald M. III; Delaney, Kris T.; Anastasaki, Athina; Hawker, Craig J.; Fredrickson, Glenn H.; Bates, Christopher M.. Application In Synthesis of Cupric bromide. The article was titled 《Stability of the A15 phase in diblock copolymer melts》. The information in the text is summarized as follows:

The self-assembly of block polymers into well-ordered nanostructures underpins their utility across fundamental and applied polymer science, yet only a handful of equilibrium morphologies are known with the simplest AB-type materials. Here, we report the discovery of the A15 sphere phase in single-component diblock copolymer melts comprising poly(dodecyl acrylate)-block-poly(lactide). A systematic exploration of phase space revealed that A15 forms across a substantial range of minority lactide block volume fractions (fL = 0.25 – 0.33) situated between the σ-sphere phase and hexagonally close-packed cylinders. SCF theory rationalizes the thermodn. stability of A15 as a consequence of extreme conformational asymmetry. The exptl. observed A15-disorder phase transition is not captured using mean-field approximations but instead arises due to composition fluctuations as evidenced by fully fluctuating field-theoretic simulations. This combination of experiments and field-theoretic simulations provides rational design rules that can be used to generate unique, polymer-based mesophases through self-assembly. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9Application In Synthesis of Cupric bromide)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Application In Synthesis of Cupric bromide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”