Hydrolysis of tetrahydroborate salts

2 Hydrolysis of tetrahydroborate salts Hydrolysis rates for tetrahydroborate salts, following equation (1) BH4 4-4 H2O = B(OH) 4-4 H2 

Acid (HA) Temp. CO Rate Coefficient (l.mole. sec ) Method Ref. 

Acid Activation energy (kcal.mole ) ikcal. mole ) ASt (cal.deg. mole ) Temp, range CO Ref. 

A solvent deuterium isotope effect = 1.7) was also found on using CgHjOD. 

The polarographic measurements permit deduction of rate coefficients for hydrolysis of the intermediate. This reaction is also subject to general acid catalysis. Table 3 lists values which have been obtained for the acids HsO , HCOJ and NH4 at three temperatures, together with the energies of activation derived from them. Russian polarographic work gave the first definite indication of the presence of an intermediate in BH4 hydrolysis. Surprisingly, Russian workers 

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