13881
The EPR spectra of [ H1 ] ( 0 ) and [ D1 ] ( 0 ) demonstrate that the singly occupied molecular orbital is primarily localized on the Fe center with the longer bond to H , that is , Fe ( II ) - H . . . Fe ( I ) .
 Chemical: H1; Chemical: Fe; Chemical: H; Chemical: Fe ( II ) - H; Chemical: Fe ( I )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: H1; Chemical: Fe; Chemical: H; Chemical: Fe ( II ) - H; Chemical: Fe ( I )