Alkyl hydrogen atoms bonded to a carbon atom in a a (alpha) position relative to a carbonyl group display unusually high acidity.While the pK a values for alkyl C-H bonds is typically on the order of 40-50, pK a values for these alpha hydrogens is usually within the range of 19-20.lkyl hydrogen atoms bonded to a carbon atom in a a (alpha) position relative to a carbonyl group display unusually high acidity.
Adventures of Superman was the first television series featuring the comic book superhero Superman. The series, which was syndicated rather than being tied to a network, began filming in 1951, and was first aired on September 19, 1952. The final first-run episode was broadcast on April 28, 1958.
It is a common misconception that Superman was the first superhero, yet there were a few that came before him. In the comic book medium alone, Dr. Occult (Dr. Mystic originally) debuted in October/1935; The Clock in Nov/1936 and Zatara debuted in the same issue as Superman, Action Comics #1 in June/1938.