These are the options for the question :The CFSE of [CoCl6] 3- is 18000 cm-1 the CFSE for [CoCl4] - will be: a. 18000 cm-1 b. 8000cm-1 c. 2000 cm-1 d. 16000 cm-1 The correct answer is - b. 8000 cm-1 ,∆t =(4/9 ) x 18000cm-1 =8000 cm-1