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.
What Did the White House Say About the $400 Million...and When Did They Say It? The U.S. announced the controversial nuclear deal with Iran on July 13, 2015. At a news conference on January 16, President Obama declared that the U.S. was lifting the first raft of sanctions against Iran. He also stated that the U.S. would return $1.7 billion to Iran, as agreed in the negotiations at the Hague.