Tag: 300-400

Reactions of di-2-pyridyl sulfide with the palladium(II) and platinum(II) diene or methoxydiene complexes. Dynamic behavior of the cationic compounds. Crystal structure of Pd(di-2-pyridyl sulfide)Cl₂ was written by Tresoldi, Giuseppe;Rotondo, Enrico;Piraino, Pasquale;Lanfranchi, Maurizio;Tiripicchio, Antonio. And the article was included in Inorganica Chimica Acta in 1992.SDS of cas: 12083-92-0 This article mentions the following:

The complexes [M(dps)Cl₂] (M = Pd^II (1); Pt^II (2)) and the labile compounds [M(MeOdiene)(dps)Cl] (M = Pd^II, MeOdiene = CH₃OC₈H₁₂ (3) or CH₃OC₁₀H₁₂ (4); M = Pt^II, MeOdiene = CH₃OC₈H₁₂ (5) or CH₃OC₁₀H₁₂ (6)) have been synthesized by reaction of dps (dps = di-2-pyridyl sulfide) with [M(diene)Cl₂] (diene = cycloocta-1,5-diene or dicyclopentadiene) and the appropriate chloro-bridged methoxydiene complexes, resp. The reactions of dps with the solvento species [M(diene)(acetone)₂]X₂ and [M(MeOdiene)(acetone)₂]X (X = BF₄, PF₆, ClO₄) have been studied and the compounds [M(MeOdiene)(dps)]X (M = Pd^II, MeOdiene = CH₃OC₈H₁₂ (7) or CH₃OC₁₀H₁₂ (8); M = Pt^II, MeOdiene = CH₃OC₈H₁₂ (9) or CH₃OC₁₀H₁₂ (10)) were prepared The structure of 1 has been determined by x-ray diffraction methods. In the square planar coordination around the Pd atom the dps mol. acts as a chelate ligand through the two pyridinic N atoms and adopts a N,N-inside conformation. The six-membered chelate ring shows a boat conformation with the Pd and S atoms out of the plane through the other four atoms on the same side. In the experiment, the researchers used many compounds, for example, Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0SDS of cas: 12083-92-0).

Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0) belongs to organic chlorides. Organic chlorides can be used in production of: PVC, pesticides, chloromethane, teflon, insulators. The haloform reaction, using chlorine and sodium hydroxide, is also able to generate alkyl halides from methyl ketones, and related compounds. Chloroform was formerly produced thus.SDS of cas: 12083-92-0

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Effective single and contest carcinogenic dyes adsorption onto A-zeolite/bacterial cellulose composite membrane: Adsorption isotherms, kinetics, and thermodynamics was written by Ibrahim, Shaimaa M.;Ghanem, Ahmed F.;Sheir, Donia H.;Badawy, Abdelrahman A.. And the article was included in Journal of Environmental Chemical Engineering in 2022.Safety of 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride This article mentions the following:

This study reports loading of A-zeolite particles on the bacterial cellulose membrane for single and binary carcinogenic dye uptake from the aqueous solution The bio based membrane was obtained using Gluconobacter Oxydans NRRL 759 in liquid culture medium. Meanwhile, the incorporation of zeolite particles within the bacterial cellulose matrix and on its surface was implemented via in-situ synthesis. The crystallite structure and the morphol. of obtained composite membrane were characterized with X-ray diffraction (XRD) and SEM (SEM) hyphenated with energy dispersive X-ray (EDX). The surface characteristics were intensively investigated by N2 adsorption/desorption isotherm, SBET, pore size distribution, and zeta potential. The results indicate that the treatment of bacterial cellulose with zeolite particles reflected two folds in surface area and three folds in the point of zero charge (pHzpc 6.7) compared with un-modified one. The produced composite membrane was also examined against removal of sole cationic methylene blue “MB”, and anionic Congo-Red “CR” or in binary solutions included “MB” with Malachite green “MG”or “CR”with different percentages through batch adsorption technique. Different parameters affecting the adsorption process, such as dye concentration, adsorbent type, contact time, temperature, and pH, were optimized. The highest removal was recorded at optimum conditions for sole “MB” dye (99.2%),”CR” dye (81%), binary mixed “2MB/1CR” (96% after 15 min, 91% after 12 h, resp.), and “2MB/1MG”(98.6% after 30 min). Moreover, linear and nonlinear adsorption isotherm models confirmed that MB adsorption and CR obeys Freundlich isotherm model. Also, the kinetic studies revealed that the dyes′ adsorption on the composite membrane could be clarified using linear and nonlinear forms of pseudo-first order, pseudo-second order, and intra-particle diffusion models. Thermodn. findings emphasized the endothermic and spontaneous adsorption process as the adsorbent/ adsorbate phys. interaction decreased the entropy. Eventually, the recyclability test revealed that the composite matrix exhibits excellent removal efficiency up to 5 recycles. The primary adsorption mechanism was proposed and confirmed with Fourier transform IR (FTIR). Finally, the unprecedented composite membrane can be considered as an economically distinguished adsorbent for the removal of not only sol dyes but also mixtures of anionic and cationic dyes. In the experiment, the researchers used many compounds, for example, 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride (cas: 61-73-4Safety of 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride).

3,7-Bis(dimethylamino)phenothiazin-5-ium chloride (cas: 61-73-4) belongs to organic chlorides. Organochlorines stimulate the central nervous system and cause convulsions, tremor, nausea, and mental confusion. Examples are dichlorodiphenyltrichloroethane (DDT), chlordane, lindane, endosulfan, and dieldrin. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. However, the extent of chlorination is difficult to control.Safety of 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Synthesis and characterization of novel ferroelectric liquid crystal polysiloxanes containing undecanoyloxy spacer. II was written by Zhang, Qizhen;Xue, Qingbin;Yang, Kongzhang. And the article was included in Polymers for Advanced Technologies in 1996.Computed Properties of C10H10Cl2Pt This article mentions the following:

The synthesis of two novel side-chain liquid crystal polysiloxanes (IP and IIP) containing 4-[(s)-2-methyl-butoxy] biphenyl or 4-[(s)-2-methyl-butoxy] biphenyl benzoate moiety as mesogenic units, resp., and an aliphatic spacer containing undecanoyloxy units is presented. Differential scanning calorimetry, polarizing microscopy and X-ray diffraction measurements revealed chiral smectic mesomorphism for the two polymers. Both polysiloxanes IP and IIP exhibit smectic A and chiral smectic C^* phases. Among the corresponding monomers prepared in this study, the 4-[(s)-2-methyl-butoxy]biphenyl 10-undecylen-1-ate shows smectic A and chiral smectic C^* phases, but the 4-[(s)-2-methyl-butoxy] biphenyl 4-(10-undecylen-1-yloxy) benzoate reveals only smectic B, smectic A and cholesteric phases. The results seem to demonstrate that the tendency toward glass, and also that melting temperature (T_m) and isotropic temperatures (T_i) of liquid crystal, mesomorphic ranges (ΔT) and thermal stability in both polymers and monomers increase with increasing the rigidity or the number of the benzene ring or length vs. diameter value of mesogenic moieties (L/D) value of mesogenic moieties. The T_i and ΔT of polysiloxanes containing the undecanoyloxy spacer are lower than those containing the undecyloxy spacer on using the same mesogenic moiety. Polymerization generated a smectic phase and led to higher liquid crystal and isotropic transition temperatures; also the liquid crystal and isotropic transition temperatures; also the liquid crystal and isotropic transition temperature; also the liquid crystal ranges were broadened and more ordered phases were formed comparing polymers with monomers, resp. In the experiment, the researchers used many compounds, for example, Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0Computed Properties of C10H10Cl2Pt).

Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. The haloform reaction, using chlorine and sodium hydroxide, is also able to generate alkyl halides from methyl ketones, and related compounds. Chloroform was formerly produced thus.Computed Properties of C10H10Cl2Pt

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Heterogeneous, platinum-catalyzed hydrogenation of (diolefin)dialkylplatinum(II) complexes: kinetics was written by Miller, Timothy M.;Izumi, Alan N.;Shih, Yen Shiang;Whitesides, George M.. And the article was included in Journal of the American Chemical Society in 1988.Reference of 12083-92-0 This article mentions the following:

(Diolefin)dialkylplatinum(II) complexes [(Ol₂)PtR₂] are rapidly reduced by H₂ in the presence of Pt black catalyst: the organic groups are converted to alkanes, and the Pt(II) to Pt(0). This Pt(0) is incorporated into the surface of the Pt black catalyst. The reaction is a heterogeneous process catalyzed by Pt(0). Its rate is strongly influenced by mass transport and by the surface area of the catalyst. It is poisoned by dineopentylmercury, dioctyl sulfide, and tri-tert-butylphosphines. Because the catalyst surface is constantly renewed by deposition of Pt, the reaction is less sensitive to poisoning than more familiar Pt-catalyzed reactions such as hydrogenation of olefins. The form of the kinetic rate law observed for reduction of (1,5-cyclooctadiene)dimethylplatinum(II) depends on the reaction conditions. Two limiting kinetic regimes are observed In one, mass transport of H₂ to the catalyst surface is rate-limiting; in the second, a reaction occurring on the Pt surface is rate-limiting. The activation energy for reaction in the mass transport limited regime is ∼3 kcal/mol and that in the reaction rate limited regime is ∼15 kcal/mol. In neither regime is there a kinetic isotope effect: ν_H2/ν_D2 = 1.0. Examination of the relative rates of reaction of a series of (diolefin)dialkyl + platinum(II) complexes indicates that the structure of the diolefin has a greater influence on the rate of reaction than does that of the alkyl group. Competitive experiments show that rates are influenced by adsorption of the (Ol₂)PtR₂ complex to the catalyst. These studies suggest that the Pt-catalyzed reaction of (Ol₂)PtR₂ with H₂ takes place by a mechanism analogous to that of the Pt-catalyzed heterogeneous hydrogenation of olefins. The Pt atom originally present in the soluble complex is incorporated into the surface of the Pt catalyst and becomes the reactive site for a subsequent cycle of chemisorption and reaction. The reaction of (Ol₂)PtR₂ complexes with H₂ thus provides a new method for generating Pt-surface alkyls under conditions representative of those used in heterogeneous Pt-catalyzed processes. In the experiment, the researchers used many compounds, for example, Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0Reference of 12083-92-0).

Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. However, the extent of chlorination is difficult to control.Reference of 12083-92-0

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Merging Iridium-Catalyzed C-H Borylations with Palladium-Catalyzed Cross-Couplings Using Triorganoindium Reagents was written by Jayasundara, Chathurika R. K.;Gil-Negrete, Jose M.;Montero Bastidas, Jose R.;Chhabra, Arzoo;Martinez, M. Montserrat;Perez Sestelo, Jose;Smith, Milton R. III;Maleczka, Robert E. Jr.. And the article was included in Journal of Organic Chemistry in 2022.Quality Control of 2-(3-Chloro-5-(trifluoromethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane This article mentions the following:

A versatile and efficient method to prepare borylated arenes furnished with alkyl, alkenyl, alkynyl, aryl and heteroaryl functional groups is developed by merging Ir-catalyzed C-H borylations (CHB) with a chemoselective Pd-catalyzed cross-coupling of triorganoindium reagents (Sarandeses-Sestelo coupling) with aryl halides bearing a boronic ester substituent. Using triorganoindium cross-coupling reactions to introduce unsaturated moieties enables the synthesis of borylated arenes that would be difficult to access through the direct application of the CHB methodol. The sequential double catalyzed procedure can be also performed in one vessel. In the experiment, the researchers used many compounds, for example, 2-(3-Chloro-5-(trifluoromethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 942069-65-0Quality Control of 2-(3-Chloro-5-(trifluoromethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane).

2-(3-Chloro-5-(trifluoromethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 942069-65-0) belongs to organic chlorides. An organic chloride is an organic compound containing at least one covalently bonded atom of chlorine. Their wide structural variety and divergent chemical properties lead to a broad range of names and applications. Alkyl chlorides readily react with amines to give substituted amines. Alkyl chlorides are substituted by softer halides such as the iodide in the Finkelstein reaction.Quality Control of 2-(3-Chloro-5-(trifluoromethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics