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The crystallographic structures of
3
,4
-dibromomethano-3,5,5-trimethyldecahydro-1H-benzocycloheptene-9,1'-spiro(2',2'-dibromocyclopropane),
C17H24Br4,
(3), 3
,4
-dichloromethano-3,5,5-trimethyldecahydro-1H-benzocycloheptene-9,1'-spiro(2',2'-dichlorocyclopropane),
C17H24Cl4,
(4), and
9
,9a
-dichloromethano-3,5,5,9-tetramethyl-1,4a,5,6,7,8,9,9a-octahydro-2H-benzocycloheptene,
C16H24Cl2, (5), resulting from
cyclopropanation reactions of the C=C double bonds of
-cis-himachalene
and
-himachalene, are reported.
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