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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Achyut ranjan gogoi
see in this conjugated case, temperature plays a role in it if temperature is 5 degree or less than then it would attack at 1,2 position and at high temperatures it attack at 1,4 position. if temperature is not mentioned then go for 1,4 because in this case c=c and c=o interaction gives a single system and attack favourable at 1,4.