STRUCTURE OF 4-CHLORONORTRICYCLENE

The structure of 4-chloronortricyclene in the gas phase was determined by electron diffraction. Interatomic distances and mean square amplitudes of vibration were evaluated. The cyclopropyl ring bonds are 1.510 Å, typical of C3 rings. A possible correlation between increased cyclopentyl bond lengths and increased flap angle is noted, as is the apparent decrease in these bond lengths with substitution of electronegative groups. A summary of CCl bond lengths in a variety of molecular environments completes the discussion. © 1969.