Rodriguez Tzompantzi, Tomasa; Amaro Hernandez, Aldo Guillermo; Meza-Leon, Rosa Luisa; Bernes, Sylvain published the artcile< Deciphering the hydrogen-bonding scheme in the crystal structure of triphenylmethanol: a tribute to George Ferguson and co-workers>, Quality Control of 76-84-6, the main research area is triphenylmethanol crystal structure hydrogen bond; alcohol; crystal structure; disorder; hydrogen bond; topological chirality; triphenylmethanol.
The crystal structure of triphenylmethanol, C19H16O, has been redetermined using data collected at 295 and 153 K, and is compared to the model published by Ferguson et al. over 25 years ago [Ferguson et al. (1992). Acta Crystalline C48, 1272-1275] and that published by Serrano-Gonzalez et al., using neutron and X-ray diffraction data [Serrano-Gonzalez et al. (1999). J. Phys. Chem. B, 103, 6215-6223]. As predicted by these authors, the hydroxy groups are involved in weak intermol. hydrogen bonds in the crystal, forming tetrahedral tetramers based on the two independent mols. in the asym. unit, one of which is placed on the threefold symmetry axis of the R [inline formula omitted] space group. However, the reliable determination of the hydroxy H-atom positions is difficult to achieve, for two reasons. Firstly, a positional disorder affects the full asym. unit, which is split over two sets of positions, with occupancy factors of ca 0.74 and 0.26. Secondly, all hydroxy H atoms are further disordered, either by symmetry, or through a positional disorder in the case of parts placed in general positions. We show that the correct description of the hydrogen-bonding scheme is possible only if diffraction data are collected at low temperature The prochiral character of the hydrogen-bonded tetrameric supramol. clusters leads to enantiomorphic three-dimensional graphs in each tetramer. The crystal is thus a racemic mixture of supS and supR motifs, consistent with the centrosym. nature of the R [inline formula omitted] space group.
Acta Crystallographica, Section C: Structural Chemistry published new progress about Crystal structure. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Quality Control of 76-84-6.
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