The determination of absolute structure. V. The importance of absorption corrections

Thirteen non-centrosymmetric structures with absorption coefficients ranging from 45 to 0.6 mm^-1 were refined using both absorption-corrected and uncorrected data. The absorption was in no case severe, since was less than 1 for each structure. In these circumstances, the absolute-structure parameter η could be determined equally clearly in both cases, although its e.s.d. increased somewhat for uncorrected data. More serious were the effects of uncorrected data on the precision of molecular dimensions.