22432
With the pivalamido group in 1 compared to 2 , the Cu ( II ) / Cu ( I ) potentials are - 0 . 23 and - 0 . 05 V vs SCE , respectively .
 Chemical: pivalamido; Chemical: Cu ( II ); Chemical: Cu ( I )
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: pivalamido, Cu ( II ), Cu ( I ) 
Answer:
 Chemical: pivalamido; Chemical: Cu ( II ); Chemical: Cu ( I )