29201
In addition , the thermochemical calculations presented here also allow a determination of the : C = CH2 bond energy of the vinyl radical at the HEAT - 345 ( Q ) level of theory , which is 77 . 70 . 3 kcal mol1 .
 Chemical: : C = CH2; Chemical: vinyl
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: : C = CH2; Chemical: vinyl