13581
The theoretical study shows that , for an ideally trigonal Ni ( II ) complex , the orbital degeneracy leads to a first - order spin - orbit coupling that results in a splitting of the M ( s ) = +/- 1 and M ( s ) = 0 components of approximately - 600 cm ( - 1 ) .
 Chemical: Ni ( II )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ni ( II ) 
Answer:
 Chemical: Ni ( II )