Dialyl or Diallyl: How To spell?
The word Dialyl is misspelled against Diallyl, a noun meaning "A volatile, pungent, liquid hydrocarbon, C6H10, consisting of two allyl radicals, and belonging to the acetylene series."
Diallyl has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings dia & yl which should not be misspelled with single 'L'
Wrong Spelling:  dia-l-yl  Correct Spelling:  dia-ll-yl 
Find more wrongly spelled words of Diallyl to spell it well.