The dynamics of molecules and molecular reactions that generate chemistry such as bond breaking, bond formation or bond rearrangement occur on the femtosecond [...] time scale. Real-time observations and investigations of these reactions are fundamental to understanding these dynamics. Ultra-fast laser pulses with intensities around 1014 W=cm2, impact on the electronic and nuclear motion on femtosecond timescale. In order to understand the region of transition states between the initial and final state of a reaction, that determines the fate of the products, detailed experimental investigations are necessary.

This work focuses on three separate investigations, one addressing the strong field control of the electronic dynamics in the hydrogen molecule and two addressing the strong field ionization dynamics in small but complex hydrocarbon molecule acetylene (C2H2). The pump-probe approach is applied to observe the real-time femtochemistry. [...]