reaction does not give the polyvinyl ether but results in [1,3] O to C rearrangement to give the corresponding aldehyde, RCH2CHO in moderate to good yields. The rearrangement selectively proceeds when vinyl ethers having α-substituents are used as the starting materials to give the corresponding ketones in high yields. With catalytic amounts of hydrosilanes, the rearrangement gives ketones or aldehydes selectively
The structure of vinylethers determines the direction of the C–O bond cleavage by alkalide K−, K+(15-crown-5)21. Highly reactive organopotassium compounds are intermediate products formed in the system containing phenylvinylether, butyl vinylether, ethylene glycol butyl vinylether or triethylene glycol methyl vinylether. Vinylpotassium and butylpotassium react with 15-crown-5. The oxacyclic ring
The present invention provides a polyvinyl ether compound containing an alkylene glycol or polyoxyalkylene glycol unit and a vinyl ether unit in a molecule and having a molecular weight in the range of 300 to 3,000. It shows high volume resistivity and a high viscosity index, so it can be favorably used as lubricating oil for a compression refrigerator.
Therefore, there is provided herein in one specific embodiment a composition comprising: a) at least one silicone surfactant, and where silicone of silicone surfactant (a) has the general structure of:
M
a
1
M
b
2
D
c
1
D
d
2
T
e
1
T
f
2
Q
g
;
and,
2≦(
a+b+c+d+e+f+g
)≦100; and,
b) a mixture comprising an aqueous phase, a solid filler phase and optionally an oil phase that is substantially insoluble in said aqueous phase.
Perfluorinated amide salts and their uses as ionic conducting materials
申请人:——
公开号:US20020009650A1
公开(公告)日:2002-01-24
The invention concerns ionic compounds in which the anionic load has been delocalized. A compound disclosed by the invention is comprised of an amide or one of its salts, including an anionic portion combined with at least one cationic portion M
+m
in sufficient numbers to ensure overall electronic neutrality; the compound is further comprised of M as a hydroxonium, a nitrosonium NO
+
, an ammonium —NH
4
+, a metallic cation with the valence m, an organic cation with the valence m, or an organometallic cation with the valence m. The anionic portion matches the formula R
F
—SO
x
—N
−
Z, wherein R
F
is a perfluorinated group, x is 1 or 2, and Z is an electroattractive substituent. The compounds can be used notably for ionic conducting materials, electronic conducting materials, colorants, and the catalysis of various chemical reactions.