11 research outputs found
(E)-2,4,7-Trichloro-3-hydroxy-8-methoxy-1,9-dimethyl-6-(1-methyl-1-propenyl)-11H-dibenzo[b,e][1,4]dioxepin-11-one monohydrate (nidulin monohydrate)
In the title compound, C20H17Cl3O5·H2O, the nidulin molecule consists of three rings, the folded central dioxepin-11-one ring being fused on both sides to phenyl rings. The molecular structure is stabilized by intramolecular O—H⋯Cl and C—H⋯Cl hydrogen bonds that generate S(6) ring motifs. The crystal structure is stabilized by intermolecular O—H⋯O and O—H⋯(O,O) hydrogen bonds mediated by two inversion-related water molecules, generating R
4
2(8) ring and C
2
2(4) chain motifs. Weak intermolecular Cl⋯O halogen bonds are also present with Cl⋯O distances of 3.071 (1) and 3.182 (2) Å
11-(3-Chloro-2-hydroxypropoxy)-2,3,9-trimethoxychromeno[3,4-b]chromen-12(6H)-one
In the title compound, C22H21ClO8, the rotenoid core is nearly planar (r.m.s. deviation 0.114 Å), with the largest deviations from the least-squares plane being 0.286 (3) and 0.274 (2) Å. An intermolecular O—H⋯O hydrogen bond links two molecules into a centrosymmetric dimer having an R
2
2(18) ring motif