Polyfuryl(aryl)alkanes and their derivatives. 13. Molecular structure of bis(5-methyl-2-furyl)(4-methoxyphenyl)methane and tris(5-methyl-2furyl)methane

4-Methoxyphenylbis(5-methyl-2-furyl)methane (I) and tris(5-methyl-2-furyl)methane (II) were investigated by x-ray crystallographic analysis. It was established that the molecules of (I) have a propeller conformation with C_s symmetry, and the furan rings are turned with the oxygen atoms towards the methine hydrogen atom. The molecule of (II) has a different conformation with C_2v symmetry; one of the furan rings and the methine C-H bond lie ideally in one plane, and the other two furan rings are arranged symmetrically with the oxygen atoms in relation to this bond and incline toward eclipsing of the exocyclic C-C bond.For Communication 12, see 1].Kubansk State Technological University, Krasnodar. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 648–653, May, 1996.