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Chemical formula. C 12 H 13 N O 3 S: Molar mass: ... Pyridinium p-toluenesulfonate (PPTS) is a colourless solid salt of pyridine and p-toluenesulfonic acid.
The structures of pyridine and pyridinium are almost identical. [87] The pyridinium cation is isoelectronic with benzene. Pyridinium p-toluenesulfonate (PPTS) is an illustrative pyridinium salt; it is produced by treating pyridine with p-toluenesulfonic acid.
Its salts are often insoluble in the organic solvent, so precipitation of the pyridinium leaving group complex is an indication of the progress of the reaction. Pyridinium cations are aromatic, as determined through Hückel's rule. [4] They are isoelectronic with benzene.
p-Toluenesulfonic acid (PTSA, pTSA, or pTsOH) or tosylic acid (TsOH) is an organic compound with the formula CH 3 C 6 H 4 SO 3 H. It is a white extremely hygroscopic solid that is soluble in water, alcohols, and other polar organic solvents. [6] The CH 3 C 6 H 4 SO 2 group is known as the tosyl group and is often abbreviated as Ts or Tos.
The second family of reagents are salts, featuring the pyridinium cation (C 5 H 5 NH +). pyridinium dichromate (PDC) is the pyridium salt of dichromate, [Cr 2 O 7] 2-. pyridinium chlorochromate (PCC) is the pyridinium salt of [CrO 3 Cl] −. These salts are less reactive, more easily handled, and more selective than Collins reagent in ...
A top Senate Democrat on Saturday accused conservative Supreme Court justices of violating federal disclosure laws in a lengthy report that caps a monthslong investigation by the Senate Judiciary ...
From January 2008 to March 2012, if you bought shares in companies when Lawrence T. Babbio, Jr. joined the board, and sold them when he left, you would have a -53.5 percent return on your investment, compared to a -4.4 percent return from the S&P 500.
From November 2010 to December 2012, if you bought shares in companies when Thurmon M. Andress joined the board, and sold them when he left, you would have a 17.0 percent return on your investment, compared to a 20.4 percent return from the S&P 500.