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.
Image caption Benjamin Netanyahu said people in Iran understood the cost of their government's policies. Israel's prime minister has warned the people of Iran that the nuclear deal being negotiated by their country and world powers is very bad for them. Specifically, the world powers want to curtail Iran's ability to enrich uranium, which can be used to make reactor fuel but also nuclear weapons. 2  Disagreement centres on how to limit Iran's development and use of centrifuges that enrich uranium.