%0 Journal Article
%A Dey, Somnath
%A Schoenleber, Andreas
%A Mondal, S.
%A Ali, S. I.
%A van Smaalen, S.
%T Role of Steric Hindrance in the Crystal Packing of Z ′ = 4 Superstructure of Trimethyltin Hydroxide
%J Crystal growth & design
%V 18
%N 3
%@ 1528-7505
%C Washington, DC
%I ACS Publ.
%M PUBDB-2018-03799
%P 1394 - 1400
%D 2018
%Z © American Chemical Society; Post referee fulltext in progress; Embargo 12 months from publication
%X The room-temperature crystal structure of trimethyltin hydroxide, (CH<sub>3</sub>)<sub>3</sub>SnOH, has been described by Anderson et al. [Cryst. Growth Des. 2011, 11, 820–826] as a 2a × 2b × 8c, 32-fold superstructure. We report a a × b × 8c, eight-fold superstructure with orthorhombic P2<sub>1</sub>cn symmetry and Z′ = 4. Structured diffuse scattering observed at the positions of presumed superlattice reflections along a* and b* might have appeared as Bragg reflections in the experiment by Anderson et al. Alternatively, Anderson et al. and the present work might have studied different polymorphs of (CH<sub>3</sub>)<sub>3</sub>SnOH. Crystalline (CH<sub>3</sub>)<sub>3</sub>SnOH constitutes polymeric chains arranged parallel to c. In the eight-fold superstructure at 220 K, the polymeric chains possess a distorted zigzag arrangement of linked linear O–Sn–O units with bent angle at oxygen of ∼139.2°. This structure is essentially different from the 8<sub>3</sub>-helical arrangement in the published 32-fold superstructure model. The origin of the distorted zigzag structure is explained by steric hindrance between hydrogen atoms of adjacent hydroxy groups and (CH<sub>3</sub>)<sub>3</sub>Sn groups. Frustration in the packing of the chains is determined by steric hindrance between methyl groups of neighboring chains, which prevents the formation of interchain C–H···O hydrogen bonds.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000427203700018
%R 10.1021/acs.cgd.7b01295
%U https://bib-pubdb1.desy.de/record/413911