Complex sentence: In 1948, Generalísimo Franco as Head of the Spanish State granted Emilio Mola the posthumous title of Duke of Mola, Grandee of Spain, and the title was immediately succeeded by his son, Don Emilio Mola y Bascón.
Split into simpler sentences: In 1948, Franco, as Head of the Spanish State, posthumously granted Mola the title of Duke of Mola and Grandee of Spain. The title was immediately assumed by his son, Don Emilio Mola y Bascón.