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 in film. The fictional character Superman, an American comic book superhero in DC Comics publications, has appeared in movies almost since his inception. He debuted in cinemas in a series of animated shorts beginning in 1941, and then starred in two movie serials in 1948 and 1950. An independent studio, Lippert Pictures, released the first Superman feature film, Superman and the Mole Men, starring George Reeves, in 1951.