1537
Electrospray ionization of dilute solutions of phenylpyridines ( phpy ) in the presence of nickel ( II ) chloride leads to gaseous ions of the type [ Ni ( phpy ) ( m ) ] ( 2 + ) with m = 3 - 5 and [ NiCl ( phpy ) ( n ) ] ( + ) with n = 1 - 3 , which are characterized by various gas - phase experiments in combination with calculations using density functional theory .
 Chemical: phenylpyridines; Chemical: phpy; Chemical: nickel ( II ) chloride; Chemical: [ Ni ( phpy ) ( m ) ] ( 2 + ); Chemical: [ NiCl ( phpy ) ( n ) ] ( + )
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: phenylpyridines; Chemical: phpy; Chemical: nickel ( II ) chloride; Chemical: [ Ni ( phpy ) ( m ) ] ( 2 + ); Chemical: [ NiCl ( phpy ) ( n ) ] ( + )