Curved arrows are used to illustrate the flow of electrons.Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction.Be sure to account for all bond-breaking and bond-making steps. all one question ### Reaction Mechanism StepsThis diagram illustrates a chemical reaction pathway and provides a visual representation of the interactions between the involved compounds. The mechanism consists of two main steps.#### Step 1: Deprotonation of an Alkyne- **Reactants:** - An alkyne with the formula RC≡CH. - A sodium amide (NaNH₂) molecule.- **Mechanism:** - The diagram indicates the interaction where sodium (Na⁺) and amide ions (⁻NH₂) are present. The base (NaNH₂) abstracts a proton (H⁺) from the alkyne, resulting in the formation of a sodium acetylide ion (RC≡C⁻ Na⁺). - **Visual cues:** - The reactants are enclosed in a dashed box with the label “Select to Add Arrows,” suggesting that the mechanism involves electron movement which could be depicted by arrow-pushing in an expanded version.#### Step 2: Nucleophilic Substitution- **Reactants:** - The sodium acetylide ion (RC≡C⁻ Na⁺). - Methyl bromide (CH₃Br).- **Mechanism:** - The negatively charged acetylide acts as a nucleophile and attacks the electrophilic carbon in methyl bromide (CH₃Br), displacing the bromide ion (Br⁻) and forming a substituted alkyne (RC≡C-CH₃).- **Visual cues:** - The transition from reactants to products is again depicted in a dashed box labeled “Select to Add Arrows” to indicate electron movement.### SummaryThe diagram outlines a two-step reaction mechanism involving deprotonation followed by nucleophilic substitution. Sodium acetylide acts as an intermediate, facilitating the formation of a new carbon-carbon bond. The visual markers and labels suggest an interactive component where electron movement is essential to the understanding of these transformations. The image presents a multi-step chemical reaction mechanism involving lithium (Li) and ammonia (NH₃).1. **Step 1**: - A hydrocarbon molecule undergoes a reaction with lithium (Li). - This step is indicated by an arrow pointing to a box labeled "Select to Add Arrows," suggesting the addition of reaction arrows for visualization. 2. **Step 2**: - The resultant intermediate reacts with ammonia (NH₃). - The downward arrow shows the progression to the next reaction step.3. **Step 3**: - Another reaction with lithium (Li) occurs. - Again, there's a "Select to Add Arrows" label for further elaboration.4. **Step 4**: - The final intermediate is treated with ammonia (NH₃). - The progress is shown by an arrow pointing downwards to the final product.The diagram highlights the use of lithium and ammonia in a sequential mechanism, emphasizing the iterative nature of the reaction.

Alkynes shows electrophilic addition reactions such addition of halogens, addition of halogen acids and hydroboration etc.Hydrogen present in alkynes is acidic in nature due to large s% character (50%). Hence, this proton is abstracted by a strong base like sodium amide and it generates the acetylide ion type intermediate. This acetylide ion type intermediate acts as the nucleophile which attacks on the methyl bromide to form the new C-C bonding.Alkynes are reduced to trans-alkens by using metal in liquid ammonia. Here metal is the source of electrons and ammonia the source of protons. In the first step, lithium donates a single electron to form the cis-radical anion intermediate which is unstable. The stable radical anion intermediate is the trans one. a)b)