CAN YOU EXPLAIN NO OF GEOMETRICAL ISOMERS WE WILL GET IN SYMMETRICAL OR UNSYMMETRICAL POLYENES....IN SOME QUESTIONS WE NEGLECT SOME DOUBLE BONDS...CAN U PLS EXPLAIN HOW TO CALCULATE TOTAL NO OF POSSIBLE GEO. ISO. IN SUCH CASES????

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane