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Intermolecular interactions in cyanodimethylarsine and cyanodimethylstibine |
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| Authors: | Doyle Britton Victor G Young Elmer O Schlemper |
| Abstract: | Cyanodimethylarsine, As(CH3)2(CN)], and cyanodimethylstibine, Sb(CH3)2(CN)], have closely related, but not isomorphous, crystal structures containing XCN?XCN? chains. The N?As distance of 3.185 (3) Å is slightly shorter than the expected van der Waals distance of 3.5 Å, while the N?Sb 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. |
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