IIT-JEE Engineering Entrance Exam
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What are factor decides for attacks at ortho -para directing positions?

by Shallu Jindal Aggarwal
Posted on 29 January, 2011

these concepts are needed for competitions

Tags: iit,aieee,aipmt

by Shallu Jindal Aggarwal posted on 03 February, 2011
groups like X,OH,OR,NH2(SPECIES CONTAINING LONE PAIRS)donate electrons to conjugate systems
by Dr.J.N.Mishra mishra posted on 02 February, 2011
+m-effect....this is due to stability of sigma -complex(becoz-ortho and para position are conjugate position)
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