so lets say you had a planet where the temperature/pressure was suitable for ammonia to exist as a liquid with a decently wide temperature range (something like a 60 degree range or more), could life (theoretically) be able to exist? From what I've gathered so far;

-ammonia is fairly polar, should be able to form hydrogen bonds
-fairly decent solvent, seems to dissolve most of the same things that water dissolves
-nitrogen seems abundant enough in the universe for this to be present
-similar specific heat to water
-one downside though is that its solid is more dense than its liquid state
-not at electronegative as oxygen, but still a good reducing agent. Should be able to play a similar role in a type of respiration as oxygen does for cellular respiration

Of course there are more factors that would go into though, but I was curious what some of you would think on the subject? What about other alternatives for water? I was thinking perhaps methane of fluorane, while methane isnt too polar, perhaps in a low temperature its dispersion forces would be suitable