Abstract
The structure of (CH 3) 2Be·2NC 7H 13 has been determined by single-crystal X-ray diffraction methods. Four monomeric molecules crystallize in a monoclinic unit cell of dimensions a = 11.82±0.02, b = 12.71±0.02, c = 12.00±0.02 Å, and β = 113.1°±0.3°. The space group is P2 1/ c. Least-squares refinement resulted in a final R value of 13.2% for the 671 visually observed reflections. A distorted tetrahedral coordination is found about the beryllium atom. The average beryllium-carbon bond distance is 1.83 Å, and the beryllium-nitrogen bond distance is 1.91 Å. The nitrogen-beryllium-nitrogen bond angle is 110.8° compared to the methyl carbon-beryllium-methyl carbon angle of 118.3°.
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