(2) is just a typo but as for (1) “metal–organic” correctly uses an en dash, and this is quite nice to see. They're consistently using the en dash even in their

(2) is just a typo but as for (1) “metal–organic” correctly uses an en dash, and this is quite nice to see. They're consistently using the en dash even in their tweets etc, which is lovely. (Wikipedia gives examples like “Boston–Hartford route” and “Bose–Einstein statistics”. https://en.wikipedia.org/w/index.php?title=Dash&oldid=1312172208#Relationships_and_connections https://en.wikipedia.org/w/index.php?title=Dash&oldid=131217... )