A subduction zone is also generated when two oceanic plates collide â the older plate is forced under the younger one â and it leads to the formation of chains of volcanic islands known as island arcs. Examples include the Mariana Islands in the western Pacific Ocean and the Aleutian Islands, off the coast of Alaska.
Gabriel Synthesis. Gabriel Synthesis is an organic chemical reaction in which primary alkyl halides are transformed into primary amines using potassium phthalimide. This reaction is named after a German chemist Siegmund Gabriel.Pure primary aliphatic amines are prepared from alkyl halides by this method.abriel Synthesis. Gabriel Synthesis is an organic chemical reaction in which primary alkyl halides are transformed into primary amines using potassium phthalimide. This reaction is named after a German chemist Siegmund Gabriel.
All Answers (16) 1  Reactions can be either exergonic (exothermic) or endergonic (endothermic) depending on the free energy difference (delta G) between substrates and products. In the case of the hydrolysis of ATP to ADP + inorganic phosphate under typical aqueous conditions, the reaction is exothermic, releasing energy. Conversely, the reverse reaction is endothermic. For a different reaction, the opposite may be true. It depends on what is reacting (and the conditions).