9786
On the basis of various spectroscopic studies it is revealed that R ( 3 ) Sn ( H ( 2 ) Or ) and R ( 2 ) Sn ( H ( 2 ) Or ) ( 2 ) exhibit distorted trigonal - bipyramidal and distorted octahedral geometry , respectively , and n - Bu ( 2 ) Sn ( HOr ) shows both five and six coordination geometry around tin .
 Chemical: R ( 3 ) Sn ( H ( 2 ) Or ); Chemical: R ( 2 ) Sn ( H ( 2 ) Or ) ( 2 ); Chemical: n - Bu ( 2 ) Sn ( HOr )
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: R ( 3 ) Sn ( H ( 2 ) Or ); Chemical: R ( 2 ) Sn ( H ( 2 ) Or ) ( 2 ); Chemical: n - Bu ( 2 ) Sn ( HOr )