16419
An analysis of bond orders and bond order derivatives as well as of properties of bond critical points in the electron densities along the intrinsic reaction coordinates ( IRCs for intermediates --> transition state ( TS ) --> products ) suggests that , from the perspective of bond breaking / formation , both reactions should be considered to be highly nonsynchronous , concerted processes .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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