DeTar, DeLos F. published the artcileTheoretical calculation of steric effects in ester hydrolysis, Related Products of esters-buliding-blocks, the publication is Journal of the American Chemical Society (1976), 98(25), 7903-8, database is CAplus.
Steric effects in aliphatic reaction series are represented quant. by Es values which are derived empirically. Es = -log krel = log k/k0 where k is the rate constant for acid-catalyzed hydrolysis of an aliphatic ester RCO2Et and k0 is the corresponding rate constant for AcOEt. Log krel = 0.340-0.789ΔSE where ΔSE = steric energy of RC(OH)3-steric energy of RCO2H. Steric energies are calculated by mol. mechanics using minor modifications of the Schleyer (1973) hydrocarbon force field; ΔSE values closely parallel ΔΔHf0 values. The standard deviation of Es is 0.24 and the correlation coefficient is -0.98 for 25 esters spanning a range of 4000 in relative rates. Rates are also calculated for another group of 20 esters for which only qual. information is available, and these extend the range of predicted relative rates to about 800,000. The success of these theor. calculations support the hypothesis that Es values do in fact measure steric effects for alkyl groups and that polar and steric effects are separable.
Journal of the American Chemical Society published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C8H16O2, Related Products of esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics