Three of the most frequently detected toxaphene components in environm
ental samples are the chlorobornanes -endo,5-exo.6-endo,8b,8c.10a,10b-
octachlorobornane (Parlar No. 26); do,5-exo,6-endo,Bb,8c.9c,10a,10b-no
nachlorobornane (Parlar No. 50), and 2,2,5,5,8b,8c. 9c.10a.10b-nonachl
orobornane (Parlar No. 62). whose structures could not be completely e
lucidated by spectroscopical methods. This paper now describes the X-r
ay structure analysis of the three compounds and presents their exact
crystal structure.