Curtius Rearrangement

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Across
  1. 1. this crossword _____
  2. 4. nationality of Curtius
  3. 6. product of rearrangement
  4. 8. intermediate found in both Curtius and Hofmann rearrangement
  5. 9. name of unique functional group in Curtius rearrangement
Down
  1. 2. cation formed just before isocyanate
  2. 3. unreactive gas released in mechanism
  3. 5. conditions are what?
  4. 7. refreshing leaving group
  5. 9. what unique functional group shifts to nitrogen?