ChemInform Abstract: Interfacial Superbase Chemistry. The Catalyzed Reaction of Potassium Hydride with Trisiamylborane.

1986 ◽  
Vol 17 (26) ◽  
Author(s):  
C. A. BROWN ◽  
S. KRISHNAMURTHY
Keyword(s):  
Potassium Hydride

Anionic polymerization of carbazolyl-substituted oxiranes initiated by potassium alkalide, potassium tert-butoxide and potassium hydride

1995 ◽  
Vol 196 (4) ◽  
pp. 1287-1293 ◽  
Author(s):  
Gintaras Buika ◽  
Juozas V. Gražulevičius ◽  
Andrzej Stolarzewicz ◽  
Zbigniew Grobelny
Keyword(s):  
Anionic Polymerization ◽  
Potassium Hydride

scholarly journals Inverse Potassium Hydride:  A Theoretical Study

2005 ◽  
Vol 109 (5) ◽  
pp. 922-927 ◽  
Author(s):  
Agnieszka Sawicka ◽  
Piotr Skurski ◽  
Jack Simons
Keyword(s):  
Theoretical Study ◽  
Potassium Hydride

scholarly journals Dual Roles for Potassium Hydride in Haloarene Reduction: CSNAr and Single Electron Transfer Reduction via Organic Electron Donors Formed in Benzene

2018 ◽  
Vol 140 (36) ◽  
pp. 11510-11518 ◽  
Author(s):  
Joshua P. Barham ◽  
Samuel E. Dalton ◽  
Mark Allison ◽  
Giuseppe Nocera ◽  
Allan Young ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donors ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Dual Roles ◽  
Organic Electron ◽  
Potassium Hydride

N–O Bond Cleavage During the Deprotonation of N,O-Bis(trimethylsilyl)hydroxylamine

2008 ◽  
Vol 63 (3) ◽  
pp. 339-341 ◽  
Author(s):  
Ajay Venugopal ◽  
Alexander Willner ◽  
Norbert W. Mitzel
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Bond Cleavage ◽  
State Structure ◽  
X Ray Diffraction ◽  
Solid State Structure ◽  
X Ray ◽  
Potassium Hydride ◽  
Oxygen Atoms

The reaction of N,O-bis(trimethylsilyl)hydroxylamine with potassium hydride in pentane affords a product of the formula {K6[OSiMe3]4[ON(SiMe3)2]2}, resulting from deprotonation followed by N-O bond cleavage and 1,2-silylshift. The compound was characterised by elemental analysis and by single crystal X-ray diffraction. The aggregate consists of a K3O3 bis-cubane core, with N(SiMe3)2 groups at the oxygen atoms shared by the two cubes, andMe3Si groups attached to the four O vertices. Two weak K···N interactions are also detected in the solid state structure.

Potassium Hydride

2007 ◽  
Author(s):  
Robert E. Gawley ◽  
Xiaojie Zhang ◽  
Qunzhao Wang
Keyword(s):  
Potassium Hydride

A Caveat Concerning Anionic Oxy-cope Rearrangements Within Bicyclo[2.2.2]octenyl Frameworks

1996 ◽  
Vol 49 (5) ◽  
pp. 639 ◽  
Author(s):  
MG Banwell ◽  
JR Dupuche ◽  
RW Gable
Keyword(s):  
Alder Reaction ◽  
Diels Alder ◽  
Cope Rearrangement ◽  
Diels Alder Reaction ◽  
Cope Rearrangements ◽  
Potassium Hydride

Compounds (10), (15) and (16) all react with potassium hydride at 0°C to give, via retro- Diels-Alder reaction, 1-methylnaphthalene (12) in 60-67% yield. No evidence could be obtained for the formation of a product derived from the anionic oxy-Cope rearrangement of substrate (16).

scholarly journals Ring-opening polymerization of monosubstituted oxiranes in the presence of potassium hydride: determination of initiation course and structure of macromolecules by MALDI-TOF mass spectrometry

2019 ◽  
Vol 26 (12) ◽  
Author(s):  
Zbigniew Grobelny ◽  
Justyna Jurek-Suliga ◽  
Sylwia Golba
Keyword(s):  
Mass Spectrometry ◽  
Ring Opening ◽  
Glycidyl Ether ◽  
Ring Opening Polymerization ◽  
Size Exclusion ◽  
Oxirane Ring ◽  
Maldi Tof ◽  
Glycidyl Ethers ◽  
Initiation Step ◽  
Potassium Hydride

AbstractSeveral monosubstituted oxiranes were polymerized with suspension of potassium hydride (KH) in tetrahydrofuran (THF) at room temperature. This heterogeneous process resulted in polyethers with various starting groups depending on the kind of monomer. The macromolecules formed in ring-opening polymerization of monosubstituted oxiranes were analyzed by Matrix Assisted Laser Desorption/Ionization - Time of Flight Mass Spectrometry (MALDI-TOF MS). It was stated, that initiation of propylene oxide (PO) polymerization with KH proceeded via three ways, i.e. cleavage of oxirane ring in the β-position, monomer deprotonation and deoxygenation. Potassium isopropoxide, potassium allyloxide and potassium hydroxide were the real initiators. The main reactions, which occur in the initiation step, depend on the type of monomer used. In the case of allyl glycidyl ether (AGE) and phenyl glycidyl ether (PGE) deprotonation of the monomer did not occur. During initiation of glycidyl ethers oxirane ring was opened and also linear ether bond between glycidyl group and oxygen atom was cleaved under influence of KH. Interestingly, formation of new kinds of macromolecules was observed in the systems containing glycidyl ethers, which do not possess mers of the monomers used. Mechanisms of the studied processes were presented and discussed. Carbon-13 Nuclear Magnetic Resonance (13C NMR) was used as supporting technique for analysis of the obtained polymers. Number average molar masses of the polymers (Mn) determined by Size Exclusion Chromatography (SEC) were about two times higher than calculated ones. It indicated that half of used KH did not take part in the initiation step.

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