See 1,2,3,4,5,6-Hexachlorocyclohexane

The six axial bonds are directed upward or downward from the plane of the ring, while the other six equatorial bonds are more within the plane. Conversion of one chair form into another converts all axial bonds into equatorial bonds and vice versa. In monosubstituted cyclohexanes, for electronic reasons, the more stable form is usually the one with the substituent in the equatorial position. If there is more than one substituent, the situation is more complicated since we have to consider more combinations of substituents which may interact. Often the more stable form is the one with more substituents in the equatorial positions. For example, in ct-1,2,3,4,5,6-hexachlorocyclohexane (see above) four chlorines are equatorial (aaeeee), and in the /Tisomer all substituents are equatorial. The structural arrangement of the /3-isomer also greatly inhibits degradation reactions [the steric arrangement of the chlorine atoms is unfavorable for dehydrochlorination (see Chapter 13) or reductive dechlorination see Bachmann et al. 1988]. 

HEXACHLORO-1,3-BUTADIENE (MAK) see HCD250 HEXACHLOROCYCLOHEXANE see BBP750 1,2,3,4,5,6-HEXACHLOROCYCLOHEXANE see BBP750 a-HEX.ACHLOROCYCLOHEXANE see BBQOOO P-HEXACHLOROCYCLOHEXANE see BBROOO A-HEXACHLOROCYCLOHEXANE see BFW500 A-l,2,3,4,5,6-HEXACHLOROCYCLOHEXANE see BFW500... 

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