Cyanopolyynes, the formula of which is HÀACHTUNGTRENNUNG (CC) nÀCN, have been detected in the interstellar medium (ISM) with n= 2 to 5.[1] Cyanoacetylene (HC3N, 1), which has been found in diverse environments from dark molecular clouds to the envelop of dying carbon stars,[2] has also been detected on Titan,[3] the largest moon of Saturn, and in comae,[4] and has been extensively studied during recent decades.[5] This compound ...
