19560
TRIR spectra were also collected for [ CpRu ( CO ) 2 ] 2 in neat CH2Cl2 , and it is interesting to note that no singly bridged [ CpRu ( CO ) ] 2 ( mu - CO ) photoproduct was observed to form following 400 - or 267 - nm excitation , despite previous observations of this species on longer time scales .
 Chemical: [ CpRu ( CO ) 2 ] 2; Chemical: CH2Cl2; Chemical: [ CpRu ( CO ) ] 2 ( mu - CO )
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: [ CpRu ( CO ) 2 ] 2; Chemical: CH2Cl2; Chemical: [ CpRu ( CO ) ] 2 ( mu - CO )