Check sibling questions

Answer the following questions: 

(A) [Ni(H 2 O) 6 ] 2+ (aq) is green in colour whereas [Ni(H 2 O) 4 (en)] 2+ (aq)is blue in colour , give reason in support of your answer . 

Answer

(A) The colour of coordination compounds depends upon the type of ligand and dd transition taking place . 

H 2 O is a weak field ligand , which causes small splitting , leading to the d-d transition corresponding to green colour .

However due to the presence of ( en ) which is a strong field ligand , the splitting is increased

Due to the change in t2g -eg splitting the colouration of the compound changes from green to blue

 

 

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.