Tricoccin R2. Erratum

Abstract

92± 94]. This has now been corrected and leads to a more sensible bond length and angle geometry. CommentDuring a comparative study of the molecular structure of Tricoccin R6 (Abdul Ajees et al., 2001) with that of the related compound Tricoccin R2 (Sekar et al., 1996) it was found that the geometry of the molecules in the two structures agreed well except in the region of ring F of Tricoccin R2. This could be traced to a wrong assignment of two of the atoms in ring F of Tricoccin R2. That is, the neighbours of atoms C21 and C22 in ring F of Tricoccin R2 are to be taken as O and C atoms, respectively, instead of C and O as in the original report. The structure of Tricoccin R2 thus modi®ed was re®ned and converged to a lower R value and the ®nal difference Fourier was better. There is now better agreement of the geometry of ring F of Tricoccin R2 with that of Tricoccin R6. ExperimentalCrystal data