Formation of aminomethanol in ammonia-water interstellar Ice

Keshav Kumar Singh, Poonam Tandon, Rajesh Kumar, Alka Misra, Shivani, Manisha Yadav, Aftab Ahmad, Manoj Kumar Chaudhary

Monthly Notices of the Royal Astronomical Society


“Aminomethanol is an important precursor of interstellar glycine. A two-step formation pathway has been proposed for aminomethanol in interstellar ice via reaction between CH+, NH3 mixed water ice and OH radical. The ice model is build using cluster approach that employs one NH3 and eleven water molecules to simulate NH3 mixed water ice. Density functional theory at B2PLYPD/6-311++G(2d, p) level of theory is utilized to explore the proposed pathway. Our proposed pathway is found to be very efficient in the ice owing to the low entrance barrier of ca. 1.443 kcal mol−1. It is also observed that CH2NH+2 is the starting reactant in our proposed root for aminomethanol, thus, if discussed formation root is applicable, the abundance of CH2NH+2 is a direct indicator for the presence of aminomethanol.”