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204 citations found for Ahmed,

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The Zn atom in the title complex, [Zn(C4H4O6)(C3H4N2)2]n, is in an octa­hedral environment comprising two N atoms fom the imidazole ligands and four O atoms from the tartrate ligands. The imino groups participate in intra­molecular N-H...O hydrogen bonds, as do the O atoms.

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In mol­ecule of the title compound, the benzene ring is inclined to the mean plane of the anthracene ring system (r.m.s. deviation = 0.024 Å) by 75.21 (9)°. In the crystal, a classical carb­oxy­lic acid inversion dimer is formed enclosing an R_{2}^{2}(8) ring motif.

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In the crystal structure of the title compound inter­molecular hydrogen-bonding inter­actions and weak C—H...π inter­actions between the constituents lead to the formation of a three-dimensional network. Hirshfeld surface analysis revealed that H...H inter­actions dominate the crystal packing.

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The title compound, C22H32O6, is a sesquiterpene isolated from Pluchea carolinensis (Compositae). The X-ray structure is consistent with a compound isolated from other species of Pluchea and elucidated from spectroscopic data [Nakanishi, Crouch, Miura, Dominguez, Zamudio & Villarreal (1974). J. Am. Chem. Soc. 96, 609-611].

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Acta Cryst. (1987). A43, C57
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