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.
Obama denies US paid Iran to release hostages, says ISIS still a threat. President Obama on Thursday pushed back on claims that the United States paid $400 million for the release of four American hostages in Iran â defending the transaction as evidence that the controversial nuclear deal with Tehran acted as a catalyst for progress in other areas.