Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes

Jutzi P, Sielemann H, Neumann B, Stammler H-G (2005)
INORGANICA CHIMICA ACTA 358(14): 4208-4216.

Journal Article | Published | English

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Abstract
The donor-free 9, 10-dialkyl-9, 10-dihydro-9, 10-digallaanthracenes 1 (alkyl: methyl) and 2 (alkyl: ethyl) were prepared by reaction of 1,2-di(chloromercurio)benzene with the corresponding trialkylgallium. and isolated as colourless air- and moisture sensitive crystalline compounds. In the solid-state structure of 1, two slightly different monomers 1A and 1B are found, which form a dimer 1A and 1B held together by "medium" strong gallium arene pi-interactions. Further weak pi-interactions between 1A and 1A and 1B and 1B constitute a one-dimensional coordination polymer containing strands of the composition [center dot center dot center dot(1A center dot center dot center dot 1B)center dot center dot center dot(1B center dot center dot center dot 1A)center dot center dot center dot](n). In contrast, compound 2 crystallizes in the form of distinct molecular units without any further intermolecular pi-interactions. The molecular units possess D-2d symmetry and are built by strong n-interactions between two digallaanthracene monomers. Two symmetrical aryl group bridges between two gallium atoms are observed for the first time in the subunits of 2. By addition of a Lewisbase (THF, Pyridine) to 2, a monomeric planar digallaanthracene framework is restored, as proven by an X-ray crystal structure analysis of 2 center dot 2Py. The different structures of 1 and 2 are explained on the basis of steric effects. (c) 2005 Elsevier B.V. All rights reserved.
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Jutzi P, Sielemann H, Neumann B, Stammler H-G. Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes. INORGANICA CHIMICA ACTA. 2005;358(14):4208-4216.
Jutzi, P., Sielemann, H., Neumann, B., & Stammler, H. - G. (2005). Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes. INORGANICA CHIMICA ACTA, 358(14), 4208-4216.
Jutzi, P., Sielemann, H., Neumann, B., and Stammler, H. - G. (2005). Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes. INORGANICA CHIMICA ACTA 358, 4208-4216.
Jutzi, P., et al., 2005. Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes. INORGANICA CHIMICA ACTA, 358(14), p 4208-4216.
P. Jutzi, et al., “Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes”, INORGANICA CHIMICA ACTA, vol. 358, 2005, pp. 4208-4216.
Jutzi, P., Sielemann, H., Neumann, B., Stammler, H.-G.: Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes. INORGANICA CHIMICA ACTA. 358, 4208-4216 (2005).
Jutzi, Peter, Sielemann, H, Neumann, B, and Stammler, Hans-Georg. “Methyl or ethyl makes the difference: Synthesis and solid-state structure of 9,10-dialkyl-9,10-dihydro-9,10-digallaanthracenes”. INORGANICA CHIMICA ACTA 358.14 (2005): 4208-4216.
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