Analyze the provided image and identify the chemical reactions and compounds shown.

Chemical Reactions and Compounds:

The image depicts a series of chemical reactions. Starting from the left, we have an initial substance labeled 'X₁'.

X₁ reacts with NaOH (sodium hydroxide) to produce 'пропан' (propane).

Propane then reacts under the influence of Ni (nickel catalyst) to form 'X_a'.

From X_a, there are two possible reaction pathways indicated:

1. A downward arrow points to CO₂ (carbon dioxide).
2. A rightward arrow leads to a molecule represented as CH_n with a Cl (chlorine) atom attached to the carbon. Further to the right, it seems to show a chain of CH₂ with a Cl atom attached to the second carbon. This part of the diagram is less clear but suggests a chlorinated hydrocarbon chain, possibly derived from propane or its intermediate product X_a.

In summary, the diagram illustrates reactions involving propane, potentially leading to decarboxylation (loss of CO₂) and chlorination.

Note: The exact structure of X₁ and X_a are not fully defined by the provided notation, and the representation of the chlorinated product could be more explicit.