On the deuteration of C$\mathsf{_{3}}$H$\mathsf{_{2}}$ in dense interstellar clouds via the reaction C$\mathsf{_{3}}$H$\mathsf{_{3}^{+}}$ + HD $\longrightarrow$ C$\mathsf{_{3}}$H$\mathsf{_{2}}$D⁺+ H$\mathsf{_{2}}$

Although deuterium isotope fractionation in cold, dark interstellar clouds is reasonably well understood via gas-phase chemistry, there are some discrepancies between observation and theory. For example, the observed abundance ratio between the deuterated species C3HD and the cyclic molecule C3H2 is... View More