Crystal structure of trimethylthallium

1 January 1970

journal article
research article
Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A

p. 28-30
https://doi.org/10.1039/j19700000028

Abstract

The crystal structure of Me₃TI has been determined by single-crystal X-ray diffraction. The crystals are tetragonal, space group P4₂/n, with Z= 8 in a unit cell of dimensions a=b= 13·464 ± 0·010, c= 6·379 ± 0·009 Å. The structure may be regarded as a polymeric three-dimensional framework constructed of asymmetric but approximately linear TI–Me ⋯ TI units, with one non-bridging methyl group attached to each thallium atom. The compound is formally isostructural with trimethylindium; both structures may be considered to consists of tetramers of S₄ symmetry, but in trimethylthallium the difference between the intra- and intertetrameric TI ⋯ TI bridge bond-lengths (5·46 ± 0·01 and 5·63 ± 0·01 Å) is much smaller than in trimethylindium (5·235 and 5·665 Å). The co-ordination about the thallium is a distorted trigonal bipyramid with three short equatorial and two long axial bonds.

Keywords

CRYSTAL STRUCTURE

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