6-[(2E)-3,7-Dimethylocta-2,6-dien-1-yl]-5,7-dihydroxy-8-(2-methylbutanoyl)-4-phenyl-2H-chromen-2-one–6-[(2E)-3,7-dimethylocta-2,6-dien-1-yl]-5,7-dihydroxy-8-(3-methylbutanoyl)-4-phenyl-2H-chromen-2-one (1/1) from Mesua elegans 1
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چکیده
The title co-crystal, C(30)H(34)O(5)·C(30)H(34)O(5), comprises a 1:1 mixture of two mostly superimposed mol-ecules with the same chemical formula that differ in the nature of the substituent (2-methyl-butanoyl or 3-methyl-butano-yl) bound at the exocyclic ketone. The lactone ring is close to planar (r.m.s. deviation = 0.058 Å) and the phenyl ring is twisted out of this plane [dihedral angle = 60.08 (9)°]. The geranyl substituent is almost normal to benzene ring to which it is connected [C-C-C(ar)-C(ar) (ar = aromatic) torsion angle = -87.8 (2)°]. Intra-molecular O-H⋯O and O-H⋯π inter-actions are formed. In the crystal, supra-molecular chains are formed along the a axis owing to C-H⋯O contacts, with the lactone carbonyl atom accepting two such bonds.
منابع مشابه
6-[(E)-3,7-Dimethylocta-2,6-dienyl]-5,7-dihydroxy-8-(2-methylbutanoyl)-4-phenyl-2H-chromen-2-one from Mesua kunstleri King (Kosterm)
The title compound, C(30)H(34)O(5), crystallizes with two symmetry-independent mol-ecules in the asymmetric unit. In the crystal structure, the two independent mol-ecules are disposed about a pseudo-center of inversion. An intra-molecular O-H⋯O hydrogen bond is observed in each independent mol-ecule. The crystal structure is stabilized by C-H⋯O hydrogen bonds.
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