Tracing our chemical origins: deuteration and complex organic molecules in Sun-like protostars

The work of this thesis is set within the general context of the overall effort to increase the observational studies of the chemical content in Solar-type protostars. Molecular deuteration and interstellar Complex Organic Molecules (iCOMs) are of great importance in the study of protostellar regions. On the one hand, deuterated species give the opportunity to recover the physical gas conditions in the pre-collapse phase. On the other hand, iCOMs constitute the smallest bricks to build up biotic matherial and they had a role in the emergence of life on Earth. Nevetheless, observations of D-bearing species and iCOMs performed with single-dish antennas exist for very few sources and only a handful are at higher angular resolution. This prevents so far the elaboration of a firm and coherent picture. In this work (i) we improved the observational scenario with the analysis of deuterated species and iCOMs in the Class 0 source HH212, and (ii) we opened new laboratories to study how the chemical-physical properties evolves with time, as in the case of the Class I protostar SVS13-A.