The determination of absolute structure. Pt. 5

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 μr 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. (orig.)