Boronic compatibility with hydrogenation

It was found that the Et3SiH and boron trifluoride monohydrate (a strong acid compatible with Et3SiH) ionic hydrogenation system produces partially hydrogenated anthracene [Eq. (11.77)] and naphthacene in excellent yield under mild conditions 240... 

This representation is compatible with a total coordination of 1 (1/2 for each a) for each hydrogen atom. Furthermore, for diborane(6), which had been nomenclated in Chapter 2 as (EaHa)2, attention is directed to the observation that each boron atom is singly-bonded to two hydrogen atoms and alpha-bonded to two other hydrogen atoms thereby yielding the traditional valence of 3 for each boron atom. 

A sulfoxide deoxygenation method consists of treatment with dichloro-borane (142), The substitution of two hydrogen atoms of borane by chlorine appears to impart the boron with a hardness compatible with the sulfoxide oxygen. 

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