http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/bom3s2_7.swf
This should help, its is basically the difference between having the lone pair in the equitorial position or the axial...
Geometrical isomerism is a space isomerism which is noticed in the organic compounds having double bond and arises because of restricted or hindered rotation of the atoms or groups about double...
Geometrical isomerism is possible for those compounds in which free rotation about bond is not possible in alkenes a double bond restrict the free rotation so arrangement of substituents on double...
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