These compounds are not very stable in contact with air, as you expect from their nature being a reducing agent.
This intermediate imine can then be isolated and reduced with a suitable reducing agent (e.g., sodium borohydride).
Chemically, sulfur can react as either an oxidant or a reducing agent.
It is a mild reducing agent and antioxidant.
The opposite effect can be achieved by treatment with a strong reducing agent that destroys the protective oxide layer on the metal.
Nano-thermites contain an oxidizer and a reducing agent, which are intimately mixed on the nanometer scale.
One of its uses is as a reducing agent in the separation of other metals from ore, such as uranium.
A reducing agent is a chemical term for an antioxidant.
