Reducing agent recognizing

The compound was also known in France before WW1I under the name Nitropentaglycerin and Bur lot and Thomas (Ref 2) detd its heat of combustion. The Germans learned about Metriolo before WWII, and, recognizing its merits as a flash and erosion-reducing agent, started to manuf it. The method employed by I.G. Farbenindustries AG was as follows (Ref 6) ... 

It is not uncommon to find the persistence of a spin adduct quantified in terms of half-life . This is a dangerous practice unless the experimental conditions are precisely defined, or it is known that the nitroxide decays by a unimolecular process. Decay may depend on reaction with a reducing agent present in the system, in which case the concentration of this species will influence the half-life. More commonly, decay will be second order (p. 5), in which case the time for disappearance of 50% of the spin adduct will show a profound dependence on its absolute concentration. The possibility of bimolecular association of nitroxides has been recognized for many years, but only very recently has it been suggested that this may be a complication under experimental conditions employed for spin trapping. Whilst the problem, which was encountered with the important [DMPO-HO ] system (Bullock et al., 1980), seems unlikely to be widespread, it is one which should always be borne in mind in quantitative studies. 

In the 1960s diimide was recognized as a new reducing agent in the reduction of double bonds72-76. 

Another group of synthetically useful reductions employs a metal as the reducing agent. The organic substrate under these conditions accepts one or more electrons from the metal. The subsequent course of the reaction depends on the structure of the reactant and reaction conditions. Three broad classes of reactions can be recognized, and these will be discussed separately. These include reactions in which the overall change involves (a) net... 

Glucocorticoids (corticosteroids) were the first hormonal agents recognized as having lympholytic properties. Administration of any glucocorticoid reduces the size and lymphoid content of the lymph nodes and spleen, although it has no toxic effect on proliferating myeloid or erythroid stem cells in the bone marrow. 

A is correct. Reduction of a ketone produces a secondary alcohol. In this case two ketones were reduced. You might recognize LiAJH4 as a reducing agent but you don t need to. 

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