Isomerism is the phenomenon whereby certain compounds, with the same molecular formula, exist in different forms owing to their different organisations of atoms. The concept of isomerism illustrates the fundamental importance of molecular structure and shape in organic chemistry.
By signing the nuclear deal, Iran has given up that nuclear umbrella for as long as two decades and made the case for the United States to further strengthen the conventional military capacities of Israel and the GCC.
Iranian development of nuclear technology began in the 1970s, when the U.S. Atoms for Peace program began providing assistance to Iran, which was then led by the Shah. Iran signed the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in 1968 as a non-nuclear weapons state and ratified the NPT in 1970.