1SIMPLE AXIS OF SYMMETRY:
step 1 take a line passing from centre of symmetry
step 2 make that line your viewing line and make the the body two dimensional
step 3 now your line will act as centre of symmetry for the new structure
step 4 try to find out a plane of symmetry containing this new plane of symmetry and perpendicular to the 2D figure you form
ifu are able to find any then the line u have taken will be line of symmetry for the original structure and the number of plane u ca get will be its FOLDEDNESS
1
gagar.iitk
·2009-03-16 02:10:14
ALTERNATING AXIS OF SYMMETRY
step 1 take a line passing from centre of symmetry
step 2 make that line your viewing line and make the the body two dimensional
step 3 now your line will act as centre of symmetry for the new structure
STEP 4 rotate your 2D figure by any angle( although it is said that it should in the form of 360/n)
step 5 try to find out a plane of symmetry parallel to this new plane
if u can find one then the axis choosen will be your alternating axis of symmetry
and one more point to remember :
absence of alternating axis of symmetry is the necessary and sufficient condition for a molecule to exhibit optical activity.
1
gagar.iitk
·2009-03-16 02:11:56
therfore we can say that every 2D figure contains alternating axis of symmetry
24vah! gaurav bhaiya............[1][1]
13
deepanshu001 agarwal
·2009-03-16 02:23:01
a compound can b optically activ even if dre is alternating axis of symmetry
1
gagar.iitk
·2009-03-16 03:05:58
no if there is alternating axis of summetry the comp can not be optically active