title: (1R*,2R*,3S*,4R*)-Diethyl 4-hy-droxy-4-methyl-2-(4-methyl-phen-yl)-6-oxo-cyclo-hexane-1,3-di-carboxyl-ate.
abstract: The title compound, C20H26O6, is chiral and crystallizes as a racemate: the relative configuration of the stereogenic centres is 1R*,2R*,3S*,4R*. The cyclo-hexane ring has a chair conformation. The ethyl fragment of the eth-oxy-carbonyl group in the 3-position is disordered over two sets of sites in a 0.650 (6):0.350 (6) ratio. The hy-droxy group acts as a bifurcated hydrogen-bond donor, forming both intra- and inter-molecular hydrogen bonds with ester carbonyl O atoms. The inter-molecular hydrogen bonds form inversion dimers in the crystal.
authors.affiliation: Baku State University, Z. Khalilov St 23, Baku AZ-1148, Azerbaijan.
authors.forename: Arif I
authors.initials: AI
authors.lastname: Ismiev
authors.forename: Narmina A
authors.initials: NA
authors.lastname: Gadirova
authors.forename: Kushvar E
authors.initials: KE
authors.lastname: Hajiyeva
authors.forename: Rizvan K
authors.initials: RK
authors.lastname: Askerov
authors.forename: Konstantin A
authors.initials: KA
authors.lastname: Potekhin