Bobek MM, Krois D, Brehmer TH, Giester G, Wiberg KB, Brinker UH. 2,6-Diaziadamantane: a single-crystal X-ray diffraction study and theoretical calculations.
J Org Chem 2003;
68:2129-34. [PMID:
12636371 DOI:
10.1021/jo020536y]
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Abstract
The first single-crystal X-ray diffraction study of 2,6-diaziadamantane (2), a compound containing two diazirine functionalities, and B3LYP/6-311+G* and MP2/6-311+G* calculations relating to the interaction between carbon-nitrogen and nitrogen-nitrogen covalent bonds and electron density within the diazirine rings have been performed. In addition, the protonation of 2-aziadamantane (1) has been investigated. The single-crystal X-ray diffraction study of 2, including UV/vis titrations of 1, corroborate the theoretical conclusion that the low basicity can be attributed to a rehybridization of the nitrogen lone pairs. Moreover, the strain in diazirine is unusually small.
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