Selective carboxylic acid decarboxylation was elaborated. Generation of acyltrifluoroacetyl peroxides from carboxylic peracids and trifluoroacetyl anhydride (Method A), as well as from trifluoroperacetic acid and acyltrifluoroacetyl anhydride (Method B), leads to simultaneous peroxide decomposition into the corresponding alkyltrifluoroacetates. DFT computations, as well as experimental data, support an acid-catalyzed heterolytic mechanism for acyltrifluoroacetyl peroxide decomposition. (C) 2002 Elsevier Science Ltd. All rights reserved.
Defluorinative silylation toward a selective preparation of α-trimethylsilyl-α,α-difluoroacetates from trifluoroacetates
作者:Kenji Uneyama、Go Mizutani
DOI:10.1039/a900455f
日期:——
Electrochemical reduction of n-hexyl trifluoroacetate 1a in MeCN, involving Bu4NBr, TMSCl, and Et3N using an H-type divided cell equipped with carbon plate as an anode and lead plate as a cathode at 50 °C, provided n-hexyl α-trimethylsilyl-α,α-difluoroacetate 2a in 62% yield, which is a promising precursor of an alkoxycarbonyldifluoromethyl carbanion equivalent and can be alkylated at the α-carbon by fluoride ion catalysis.
ELECTROLYTIC SOLUTION, ELECTROCHEMICAL DEVICE, LITHIUM ION SECONDARY BATTERY, AND MODULE
申请人:DAIKIN INDUSTRIES, LTD.
公开号:US20200280096A1
公开(公告)日:2020-09-03
An electrolyte solution containing a compound represented by the following formula (1):
wherein R
101
and R
102
are the same as or different from each other and are each a hydrogen atom, a fluorine atom, or an alkyl group optionally containing a fluorine atom; and R
103
is an alkyl group or an organic group containing an unsaturated carbon-carbon bond. Also disclosed is an electrochemical device and lithium ion secondary battery including the electrolyte solution, and a module including the electrochemical device or lithium ion secondary battery.
A Study of d-Orbital Effects in Esters of Trifluorothiolacetic Acid. A Comparison of Evidence from Dipole Moment and Kinetic Data
作者:E. Bock、A. Queen、S. Brownlee、T. A. Nour、M. N. Paddon-Row
DOI:10.1139/v74-457
日期:1974.9.1
The dipole moments of a series of esters of trifluoroacetic acid and trifluorothiolacetic acid have been determined in benzene solution at 25 °C. The results are consistent with conjugative and hyp...
在 25 °C 的苯溶液中测定了一系列三氟乙酸和三氟硫醇乙酸酯的偶极矩。结果与共轭和催眠一致...
Double- and Triple-Consecutive O-Insertion into <i>tert</i>-Butyl and Triarylmethyl Structures
作者:Pavel A. Krasutsky、Igor V. Kolomitsyn、Sergiy G. Krasutsky、Paul Kiprof
DOI:10.1021/ol049171p
日期:2004.7.1
concecutive Criegee rearrangement reactions were studied for tert-butyl trifluoroacetate, triarylcarbinols, and benzophenone ketales with trifluoroperacetic acid (TFPAA) in trifluoroacetic acid (TFA). The formation of methyl acetate and methyl trifluoroacetate indicates that the consecutive double-O-insertion process has taken place for tert-butyl trifluoroacetate. The intermediate dimethoxymethylcarbonium
ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, AND MODULE
申请人:DAIKIN INDUSTRIES, LTD.
公开号:US20200203769A1
公开(公告)日:2020-06-25
An electrolyte solution for a lithium ion secondary battery, containing a compound (1) represented by the following formula (1):
wherein R
1
and R
2
are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10
−6
to 1.0×10
3
ppm. Also disclosed is an electrolyte solution for a lithium ion secondary battery, containing an imidazolium cation (1-1) represented by the following formula (1-1), a bis(oxalato)borate anion, and a hexafluorophosphate anion, the formula (1-1) being:
wherein R
1
and R
2
are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10
−6
to 1.0×10
3
ppm.