The cyclopropanation reaction between an alkene and a singlet carbene is stereospecific. What does the stereospecificity of the reaction imply about its mechanism?

Show suitable reagents to carry out the following conversion.

For the reaction given below:

Determine the ways to produce the following stereoisomers by modifying the reaction.

The heterocyclic compound below is a remarkably stable carbene often used as a ligand in organometallic chemistry. Explain the stability of this particular carbene.

Draw the plausible mechanism that explains the given reaction.

Show how the compound below can be synthesized from methylenecyclobutane.

Predict the oxidation state of the indicated carbon in the compound below.

Is the given reaction a redox reaction? If so, which molecules underwent oxidation and reduction?

For the given reaction, use oxidation numbers to determine if it is a redox reaction.

Label each of the following reactions as reduction, oxidation, or none of it.