Crystal studies of musk compounds. XIII. Molecular structures of 6-formyl-1,1,2,4,4,7-hexamethyltetralin (I) and 6-formyl-1,1,4,4,5,7-hexamethyltetralin (2)

Abstract

The crystal structures of the title compounds (1,1,2,4,4-7-hexamethyl- and 1,1,4,4,5,7-hexamethyl-1,2,3,4-tetrahydro-6-naphtalenecarbaldehyde, both musks of formula C 17 H 24 O), have been determined by X-ray diffraction. The non-aromatic ring adopts a half-chair conformation with the diad axis passing through the midpoint of the C2−C3 bond and that of the ring-fusion bond C9−C10. The formyl groups in both compounds show disorder, each with two partially resolved O atoms. With respect to the aromatic ring, the two conformations of the formyl groups differ by approximately 180°. Compound (2) also shows disorder in the cyclohexene ring