Also https://news.ycombinator.com/item?id=44285875 https://news.ycombinator.com/item?id=44285875 ("Preparation of a neutral nitrogen allotrope hexanitrogen C2h

Also https://news.ycombinator.com/item?id=44285875 https://news.ycombinator.com/item?id=44285875 ("Preparation of a neutral nitrogen allotrope hexanitrogen C2h-N6 (nature.com)"—27 comments)