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The structures of three trimethylarsine-boron trihalide adducts: (CH3)3AsBCl3, (CH3)3AsBBr3, and (CH3)3AsBI3

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Abstract

An X-ray structure analysis of three trimethylarsine-boron trihalide adducts has been undertaken. Crystals of (CH3)3AsBCl3 and (CH3)3AsBBr3 are monoclinic with space groupP21/m (No. 11) withZ=2 while those of (CH3)3AsBI3 are orthorhombic with space groupPnma (No. 62) withZ=4. For (CH3)3AsBCl3,a=6.497(3) Å,b=10.735(3) Å,c=7.070(2) Å,β=111.8(3)°,V=458.4(3) Å3,R=0.0343. For (CH3)3AsBBr3,a=6.672(4) Å,b=11.135(7) Å,c=7.199(4) Å,β=111.5(1)°,V=497.7(5) Å3,R=0.0434. For (CH3)3ÅsBI3,a=13.113(7) Å,b=11.733(5) Å,c=7.387(3) Å,V=1136.5(5) Å3,R=0.0329. The As-B bond lengths are 2.065(6), 2.04(1), and 2.03(1) Å, respectively, for the chloride, bromide, and iodide. These and other structural parameters are discussed with reference to previous predictions based on vibrational spectra and previous structural studies on the trimethyl-phosphine and trimethylamine adducts.

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Authors and Affiliations

  1. Department of Chemistry, University of Windsor, N9B 3P4, Windsor, Ontario, Canada

    Raj K. Chadha, Jaafar M. Chehayber & John E. Drake

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  1. Raj K. Chadha
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  2. Jaafar M. Chehayber
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  3. John E. Drake
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Chadha, R.K., Chehayber, J.M. & Drake, J.E. The structures of three trimethylarsine-boron trihalide adducts: (CH3)3AsBCl3, (CH3)3AsBBr3, and (CH3)3AsBI3 . Journal of Crystallographic and Spectroscopic Research 15, 53–60 (1985). https://doi.org/10.1007/BF01185717

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