How does the structuaral formula of butane and butene differ?
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"Can mixtures be separated by chromatography?"
You gots #C_4H_10# versus #C_4H_8#...the LATTER formula has ONE so-called [degree of unsaturation.](https://socratic.org/questions/5a2d1fec11ef6b07432f27fc)
And #C_4H_10# can form TWO structural isomers. Butylene can form FOUR structural or geometric isomers...the which are...
#H_2C=C-CH_2CH_3# #"1-butylene"#
#H_3C-CH=CHCH_3# #"2-butylene"#; how many geometric isomers can this form...?
#"isobutylene"# #(H_3C)_2C=CH_2#
#C_4H_8# can FORM TWO ring structures (and the ring ALSO REPRESENTS one degree of unsaturation). What are these?