29200
The isomerization energy of vinylidene calculated at the HEAT - 456QP level of theory is 45 . 530 . 15 kcal mol1 , in agreement with the previous best estimate , but associated with a much smaller uncertainty .
 Chemical: vinylidene
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: vinylidene