C. Boss et al., MESO-1,11-DIMETHYLCYCLOTRIDECA-2,9-DIYNE-1,11-DIOL, Acta crystallographica. Section C, Crystal structure communications, 53, 1997, pp. 322-325
The title compound, C15H22O2, (5), has been prepared and its structure
determined. At room temperature, two conformations are observed, but
at 193 K, the compound shows only the conformation which has 67% occup
ancy at room temperature. The appearance of two conformations and the
low symmetry of compound (5) are in accordance with the general struct
ural behaviour of 13-membered-ring systems. meso-(5) crystallizes in t
he monoclinic space group I2/a. The lengths of the triple bonds are cl
ose to 1.175 Angstrom at room temperature and 1.188 Angstrom at 193 K.
The bond angles at the triple bonds deviate by less than 7 degrees fr
om being linear and are almost temperature independent.