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.
Superman's first appearance was in Action Comics #1, in 1938. In 1939, a self-titled series was launched. The first issue mainly reprinted adventures published in Action Comics, but despite this the book achieved greater sales. 1939 also saw the publication of New York World's Fair Comics, which by summer of 1942 became World's Finest Comics.