Question

List the reagents in order that will accomplish this transformation, beginning with the num.

a) NaBH₄, LiAlH₄, H₂/Pd-C
b) H₂/Pd-C, NaBH₄, LiAlH₄
c) LiAlH₄, NaBH₄, H₂/Pd-C
d) LiAlH₄, H₂/Pd-C, NaBH₄

Answer 1

The question lacks specific context, but the reagents listed include NaBH4, LiAlH4, and H2/Pd-C, which are used for reductions of organic compounds depending on the nature of the functional groups present.

Step-by-step explanation:

The question asks to list the reagents that will accomplish a specific chemical transformation.

Without specific details about the starting material and the desired product, providing a definitive answer is impractical. However, we can discuss the general applications of the reagents listed:

• NaBH4 (Sodium borohydride) is a selective reducing agent typically used for the reduction of aldehydes and ketones to alcohols.
• LiAlH4 (Lithium aluminium hydride) is a more potent reducing agent than NaBH4 and can reduce a wider range of functional groups, including carboxylic acids, esters, and amides to alcohols.
• H2/Pd-C (Hydrogen gas with palladium on carbon) is used for the catalytic hydrogenation of unsaturated bonds such as alkenes and alkynes.

To provide a more accurate answer, specific information regarding the reactants and the target product is needed. Otherwise, this explanation offers a broad understanding of the roles these reagents have in chemical transformations.

Answer 2

The correct order is LiAlH₄, then NaBH₄, and finally H₂/Pd-C, as these reagents are used for reductions with LiAlH₄ being the strongest and used for more challenging reductions, followed by NaBH₄ for milder reductions, and H₂/Pd-C for the hydrogenation of unsaturated bonds. The correct answer is c.

Step-by-step explanation:

The correct order of reagents that will accomplish the transformation mentioned in the student's question is most likely (c) LiAlH₄, NaBH₄, H₂/Pd-C. These reagents are used for reductions in organic chemistry:

• LiAlH₄ (Lithium aluminum hydride) is a strong reducing agent, typically used to reduce carboxylic acids, esters, and amides to alcohols.
• NaBH₄ (Sodium borohydride) is a milder reducing agent compared to LiAlH₄ and is generally used to reduce aldehydes and ketones to alcohols.
• H₂/Pd-C (Hydrogen gas with a palladium on carbon catalyst) is commonly used to reduce alkynes to alkanes and to perform hydrogenation of alkene bonds to alkanes.

Without knowing the exact starting and ending compounds, this is the most logical order based on the typical uses of these reagents in chemical transformations.