From organoboranes table

Table 4. Displacement of Olefins from Organoboranes with 1-Decene...

Deposition reactions for some reducing agents are given in Table 1 hydrogen is a principal by-product of each reduction. Elemental phosphoms or boron is codeposited with the reduced metal from hypophosphite, borohydride, or organoborane baths (15). Other minor reactions can also occur (18). All of these reductions can be viewed as dehydrogenation reactions (16,19). 

Table 3. Iminoboranes derived from monoborine and organoboranes (aldimino-boranes)... 

Table 1. Thermal rearrangement of organoboranes resulting from the hydroboration of tetrasubstituted cyclopentene derivatives of type 34.

J-Heterosubstituted organoboranes, which are highly sensitive to elimination, can be derived from heterocyclic alkenes and are cleanly transformed into the corresponding chiral alcohols of high optical purity (Table 2). 

Functionalized alkenes and alkynes can be hydroborated . Directive effects are discussed in 5.3.2.5.1(i). As follows from Table 2, hydroboration of vinylic and allylic derivatives leads to the placement of boron in the a., fi or y position to the substituent. The -substituted organoboranes are prone to uncatalyzed cis elimination and acid- or base-catalyzed trans- elimination The rate of elimination depends on the substituent at... 

Organoboranes from 9-BBN-H. First identified by Kdster, 9-BBN-H dimer is prepared from the cyclic hydroboration of 1,5-cyclooctadiene (eq 1). As a dialkylborane, 9-BBN-H exhibits extraordinary steric- and electronic-based regioselectivities which distinguish these derivatives from the less useful polyhydridic reagents (Table 1). ... 

In general, the intermediate organoboranes on usual oxidation afford the corresponding alcohols, essentially in quantitative yields. Only in the case of 2,3-dimethyl-2-butene is the primary alcohol (<0.5%) derived from an isomer-ized organoborane. The results are summarized in Table 6.2 [2]. 

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