Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 5 (May 2002)

Acta Cryst. (2002). C58, m307-m309 [doi:10.1107/S0108270102006030]

Intermolecular interactions in cyanodimethylarsine and cyanodimethylstibine

D. Britton, V. G. Young and E. O. Schlemper

Abstract: Cyanodimethylarsine, [As(CH₃)₂(CN)], and cyanodimethylstibine, [Sb(CH₃)₂(CN)], have closely related, but not isomorphous, crystal structures containing XCNXCN chains. The NAs distance of 3.185 (3) Å is slightly shorter than the expected van der Waals distance of 3.5 Å, while the NSb distance of 2.862 (9) Å, compared with the expected value of 3.7 Å, is much shorter. This is consistent with Sb being a stronger Lewis acid than As.

Formula: [As(CH₃)₂(CN)] and [Sb(CH₃)₂(CN)]

Online 30 April 2002


	Structure factor file (CIF format) (55.7 kbytes) Contains datablock I

	Structure factor file (CIF format) (48.1 kbytes) Contains datablock II

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