lithium cleavage
Thermal shock cracking of lithium niobate single crystal
The quantitative estimation of failure stress of a lithium niobate (LN) single crystal due to thermal shock was investigated. Cylindrical test specimens were used in the thermal shock tests. The thermal stress of an LN test specimen under conditions of thermal shock cracking was calculated from a computer program which takes account of the crystal anisotropy, …
Lithium chloride-catalyzed selective demethylation of aryl methyl …
Besides lithium chloride, sodium iodide, sodium chloride, potassium bromide, cuprous chloride, cupric chloride and ammonia chloride were employed as promoter for the cleavages of 1 in DMF. As shown in Table 2, sodium iodide, potassium iodide, cupric chloride and lithium chloride were effective in promote cleavage reaction. ...
Ether cleavage
Ether cleavage refers to chemical substitution reactions that lead to the cleavage of ethers.Due to the high chemical stability of ethers, the cleavage of the C-O bond is uncommon in the absence of specialized reagents or under extreme conditions. In organic chemistry, ether cleavage is an acid catalyzed nucleophilic substitution reaction.
Cleavage of ethers and demethylation of lignin in acidic concentrated lithium bromide (ACLB…
Cleavage of ethers and demethylation of lignin in acidic concentrated lithium bromide (ACLB) solution Z. Li, E. Sutandar, T. Goihl, X. Zhang and X. Pan, Green Chem., 2020, 22, 7989 DOI: 10.1039/D0GC02581J This article is licensed
Singlet oxygen and dioxygen bond cleavage in the aprotic lithium …
Having established that O–O bond cleavage and scrambling occurs on LiO 2 disproportionation to Li 2 O 2, we then investigated the extent to which such scrambling forms reactive 1 O 2.We did so using the 1 O 2 trap 9,10-diphenylanthracene (DPA), which reacts with 1 O 2 to form 9,10-diphenylanthraceneendoperoxide (DPA-O 2) …
Cleavage and surface energies of LiNbO3
We evaluated the cleavage energy at initiation and the free surface energies, Γ0 and γ s, respectively, of the two low energy cleavage plane of trigonal LN crystal. The highest energy is that on the ( 012) Miller planes, i.e., Γ (012) = 2.2 J/m 2 and γ ( 012) = 1.1 J / m 2.
Spectroscopic Characterization of the Synergistic Mechanism of Ruthenium–Lithium Hydrides for Dinitrogen Cleavage …
Elucidating the role of alkali/alkaline earth metal hydrides in dinitrogen activation remains an important and challenging goal for spectroscopic studies of bulk systems, because their spectral signatures are often masked by the collective effects. Herein, mass-selected photoelectron velocity-map imaging spectroscopic and quantum …
[PDF] Singlet oxygen and dioxygen bond cleavage in the aprotic lithium …
DOI: 10.1016/j.joule.2021.12.012 Corpus ID: 245898060 Singlet oxygen and dioxygen bond cleavage in the aprotic lithium-oxygen battery @article{Dong2022SingletOA, title={Singlet oxygen and dioxygen bond cleavage in the aprotic lithium-oxygen battery}, author={Shanmu Dong and Sixie Yang and Yuhui Chen …
Lithium use and risk of fracture: a systematic review and meta-analysis of observational studies …
Results: Of the 3819 studies that were identified by our search strategy, eight were eligible for the systematic review, while seven of them qualified for the meta-analysis. In studies that reported risk ratio (RR) of fracture as an outcome (five studies [n = 1,134,722]), lithium use was associated with a 20% decrease in risk of fracture (RR ...
Action of Grignard Reagents. VI. (a) Cleavage by Organomagnesium and Lithium Compounds and by Lithium …
Paris E. Georghiou,, Zhaopeng Li, and, Muhammad Ashram. Chemistry of 1,8-Naphthalenesultone: Synthesis of a Water-Soluble Tetrasulfonated C2v Calixnaphthalene. The Journal of Organic Chemistry 1998, 63 (11), 3748-3752.
Enzyme-Inspired Room-Temperature Lithium–Oxygen Chemistry via Reversible Cleavage …
Li-O 2 batteries are promising energy storage systems due to their ultra-high theoretical capacity. However, most Li-O 2 batteries are based on the reduction/oxidation of Li 2 O 2 and involve highly reactive superoxide and peroxide species that would cause serious degradation of cathodes, especially carbon-based materials. ...
Molecular mechanism for target RNA recognition and cleavage of …
The cleavage activity of Cas13h1 is enhanced by a R (G/A) 5''-PFS, and inhibited by tag:anti-tag RNA pairing. We determined the structures of Cas13h1-crRNA binary complex at 3.1 Å and Cas13h1-crRNA-target RNA ternary complex at 3.0 Å. The ternary complex adopts an elongated architecture, and encodes a nucleotide-binding pocket within Helical …
Cleavage of ethers and demethylation of lignin in acidic concentrated lithium bromide (ACLB) solution …
Besides, the β-O-4 cleavage via the S N 2 mechanism would have introduced a significant amount of bromine to the Cβ position because β-O-4 is the most abundant ether bonds in lignin, but this was not observed. Conclusions This work demonstrated the ether
Singlet oxygen and dioxygen bond cleavage in the aprotic lithium …
The cathode reaction on discharge is the reduction of O2 to Li2O2 via the intermediate LiO2. We show that disproportionation is the dominant route of Li2O2 formation, not the direct reduction of LiO2. Using a mixture of 18O18O and 16O16O gases, we demonstrate that a proportion of LiO2 disproportionation involves O–O bond …
Singlet oxygen and dioxygen bond cleavage in the aprotic lithium …
The cathode reaction on discharge is the reduction of O2 to Li2O2 via the intermediate LiO2. We show that disproportionation is the dominant route of Li2O2 formation, not the direct reduction of LiO2. Using a mixture of 18O18O and 16O16O gases, we demonstrate that a proportion of LiO2 disproportionation involves O–O bond cleavage and that a relatively …
ChemInform Abstract: "Doping‐Effect" of Lithium Perchlorate in …
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original
Report Singletoxygenanddioxygenbondcleavagein the aprotic lithium …
Singlet oxygen and dioxygen bond cleavage in the aprotic lithium-oxygen battery. The cathode reaction on discharge is the reduction of O2 to Li2O2 via the intermediate LiO2. We show that disproportionation is the dominant route of Li2O2 formation, not the direct reduction of LiO2. Using a mixture of 18O18O and 16O16O gases, we demonstrate that ...
Pentacoordinate spirosilicate anion, bis(2,2′-biphenyldiyl)methylsilicate, synthesized by the lithium cleavage …
Request PDF | Pentacoordinate spirosilicate anion, bis(2,2′-biphenyldiyl)methylsilicate, synthesized by the lithium cleavage of dimethoxyethane | The reaction of spirobisilafluorene (1) with ...
Spectroscopic Characterization of the Synergistic Mechanism of Ruthenium Lithium Hydrides for Dinitrogen Cleavage
Spectroscopic Characterization of the Synergistic Mechanism of Ruthenium−Lithium Hydrides for Dinitrogen Cleavage Jumei Zhang, Gang Li, Jianping Guo, Hongjun Fan, Ping Chen, Ling Jiang,* and Hua Xie* Cite This: J. Phys. Chem. Lett. 2022, 13, 3937−3941
Editors'' Choice—Lithium Primary Batteries Employing Multi-Electron Carbon-Fluorine Bond Cleavage …
A higher cutoff voltage was used for DMSO (1.9 V vs Li/Li +) compared to the other solvents (1.6 V vs Li/Li +) due to the relatively limited stability of DMSO at lower potentials. The DMSO-based cell exhibited the highest discharge voltage at 2.6 V, which was ∼0.6 V higher than that with TEGDME, while the capacities of the two cells were …
Spectroscopic Characterization of the Synergistic Mechanism of Ruthenium-Lithium Hydrides for Dinitrogen Cleavage …
Theoretical analyses show that the synergy between Ru and LiH efficiently lowers the energy barrier of N≡N bond cleavage. These findings clarify the pivotal roles played by the LiH species in the transition metal catalysts for N 2 activation and have important practical implications for the prospective design of high-performance catalysts …
Regioselective and stereoselective cleavages of P–S/C–S bonds by lithium …
Another strategy explored to break the P–S or C–S bond of S P-4 involved using lithium or lithium-naphthalene 8.When S P-4b was treated with lithium, cleavage of the Et–S bond occurred and afforded 9, which after quenching yielded a peak at 97.97 ppm in its 31 P NMR spectrum.P NMR spectrum.
Failure in several attempts to prepare arylsilyllithium reagents by the gilman cleavage of disilanes with lithium …
@article{Rahman1992FailureIS, title={Failure in several attempts to prepare arylsilyllithium reagents by the gilman cleavage of disilanes with lithium}, author={Noorsaadah Abd Rahman and Ian N. Fleming and Anna B. Zwicky}, journal={Journal of Chemical //api ...
The importance of the Lewis base in lithium mediated metallation and bond cleavage reaction …
The importance of the Lewis base in lithium mediated metallation and bond cleavage reaction of allyl amines and allyl phosphines V. L. Blair, M. A. Stevens and C. D. Thompson, Chem. Commun., 2016, 52, 8111 DOI: 10.1039/C6CC03947B
Lepidolite
Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with chemical formula K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2.[2][3] It is the most abundant lithium-bearing mineral[4] and is a secondary source of this metal. It is the major source of the alkali metal rubidium. Lepidolite is found with other lithium-bearing minerals ...
18.4: Reactions of Ethers
18.4: Reactions of Ethers- Acidic Cleavage. Page ID. OpenStax. OpenStax. Ethers are unreactive to many reagents used in organic chemistry, a property that accounts for their wide use as reaction solvents. Halogens, dilute acids, bases, and nucleophiles have no effect on most ethers. In fact, ethers undergo only one truly general reaction—they ...
Hydroxide-catalyzed cleavage of selective ester bonds in phosphatidylcholine…
3.2.1. Cleavage of carbonyl ester bonds in presence of lithium halides Fig. 3 A–C shows the fingerprint region (1800–1300 cm-1) in the spectra of neat PC and PC reacted with lithium chloride, lithium bromide, and lithium iodide.The peak corresponding to …
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