Organic compounds that contain the functional group − N = C =O are known as isocyanates . It is conventional in organic chemistry to write isocyanates with two double bonds , which accords with a simplistic valence bond theory of the bonding . In nucleophilic substitution reactions cyanate usually forms an isocyanate . Isocyanates are widely used in the manufacture of polyurethane products and pesticides ; Methyl isocyanate , used to make pesticides , was a major factor in the Bhopal disaster
Bhopal disaster
Bhopal disaster
Cyanate