Thalene or Thallene: How To spell?

The word Thalene is misspelled against Thallene, a noun meaning "A hydrocarbon obtained from coal-tar residues, and remarkable for its intense yellowish green fluorescence."

Thallene has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings tha & ene which should not be misspelled with single 'L'
Wrong Spelling:  tha-l-ene 
Correct Spelling:  tha-ll-ene 
Explore spell check of Thallene to spell without errors.