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Pyrrole is an extremely weak base for an amine, with a conjugate acid pK a of −3.8. The most thermodynamically stable pyrrolium cation (C 4 H 6 N +) is formed by protonation at the 2 position. Substitution of pyrrole with alkyl substituents provides a more basic molecule—for example, tetramethylpyrrole has a conjugate acid pK a of +3.7.
Polypyrrole Pyrrole can be polymerised electrochemically. [1] Polypyrrole (PPy) is an organic polymer obtained by oxidative polymerization of pyrrole. It is a solid with the formula H(C 4 H 2 NH) n H. It is an intrinsically conducting polymer, used in electronics, optical, biological and medical fields. [2] [3]
Calculations suggest that whereas pyrrole (C 4 H 4 NH) molecule is planar, phosphole (C 4 H 4 PH) and heavier metalloles are not, and their pnictogen-bonded hydrogen atom extends out of plane. [9] A similar tendency is predicted for the fluorinated C 4 F 4 MH derivatives (M = N, P, As, ..), but the inversion barriers are about 50–100% higher.
Heterocyclic organic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of organic heterocycles. [2] Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose and related materials), and many natural and synthetic dyes. More than half of ...
New York — The one-bedroom apartment in a 1935 six-story building in the Fordham neighborhood in the Bronx wasn’t exactly Zaimah Abdul-Majeed’s dream home. It was small for a family of four, but the rent was reasonable, just $1,050 a month, and the walls looked clean with a fresh coat of white paint.
Braden Huff scored 25 points on 11-of-12 shooting to help No. 13 Gonzaga cruise to a 102-72 victory over Nicholls on Wednesday night at Spokane, Wash. Graham Ike added 20 points and Ryan Nembhard ...
For example, she uses an extra-strength toothpaste designed for people at higher risk of cavities and tooth decay that a new dentist recommended after she explained her Crohn’s disease and oral ...
Also in April 2015, the company signed Skadden Arps to be the anchor tenant at One Manhattan West, a 2.1 million square-foot office tower in New York City. [23] In October 2015, it sold a 44% interest in the $8 billion Manhattan West development in New York to the Qatar Investment Authority. [24]