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.
The Iran nuclear deal was written with several âsunsetâ provisions setting expiration dates, some of them 15 years into the future, when restrictions on the Islamic Republicâs nuclear program would lift. Then Donald Trump was elected president, and a sunset on the deal itself became possible.