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The estimated pK a of this carbon acid is near 15. [2] Potassium tert-butoxide has been used in place of butyl lithium. [3] Sodium amide has also been used a base. [4] Methylenetriphenylphosphorane is used to replace oxygen centres in aldehydes and ketones with a methylene group, i.e., a methylenation: R 2 CO + Ph 3 PCH 2 → R 2 C=CH 2 + Ph 3 PO
[1]: 112 They are needed to allow appliances with 3-wire power cords to plug into legacy ungrounded (two slot) receptacles found in older buildings. The use of such an adapter avoids the need to replace receptacles, but is potentially hazardous if the grounding tab is not connected to electrical ground.
Triphenylphosphinegold(I) chloride is a popular stable precursor for a cationic gold(I) catalyst used in organic synthesis. [3] Typically, it is treated with silver(I) salts of weakly coordinating anions (e.g., X – = SbF 6 –, BF 4 –, TfO –, or Tf 2 N –) to generate a weakly bound Ph 3 PAu–X complex, in equilibrium with the catalytically-active species [Ph 3 PAu] + X – in solution.
The former couple is parents to sons X Æ A-Xii, 4, and Techno Mechanicus, 2, as well as daughter Exa Dark Sideræl, 3 Grimes Says She Didn't See One of Her Kids for 5 Months amid Year-Long ...
Another class of compounds called phosphazenes are represented with the formula (−N=P(−X) 2 −) n, where X = halogen, alkoxy group, amide and other organyl groups. One example is hexachlorocyclotriphosphazene (−N=P(−Cl) 2 −) 3. Bis(triphenylphosphine)iminium chloride [Ph 3 P=N=PPh 3] + Cl − is also referred to as a phosphazene ...
1,2-Dioleoyl-3-trimethylammonium propane (often abbreviated DOTAP or 18:1TAP) is a di-chain, or gemini, cationic surfactant. It is most commonly encountered as an active ingredient in certain fabric softeners. The pure material can also be used for the liposomal-transfection of DNA, RNA and other negatively charged molecules. [1]
It is a phthalate and is the diester of phthalic acid and the 10-carbon branched-chain alcohol 2-propylheptanol. This colorless, viscous liquid is used for softening PVC plastics and is a general purpose PVC plasticizer. [2] It possesses very good plasticizing properties and may be used as a direct replacement for DEHP and DINP in many ...
Pfizer said Tuesday that it now expects adjusted earnings to range between $2.75 and $2.95 per share for 2024. That amounts to a 30 cent increase at the midpoint from a forecast the company made ...