The Vespiary

The Hive => Chemistry Discourse => Topic started by: dickdastardly on October 20, 2001, 02:59:00 AM

Title: hydrogenation via the microwave
Post by: dickdastardly on October 20, 2001, 02:59:00 AM

For catalytic hydrogenation in the microwave you need a substance called ammonium formate. Could someone please elaborate on what it is used for and what it is. or how you could make it

Title: Re: hydrogenation via the microwave
Post by: Rhodium on October 20, 2001, 04:01:00 AM

It is a salt between ammonia and formic acid. It is made by mixing the solutions and evaporating the water.

Title: Re: hydrogenation via the microwave
Post by: jim on October 21, 2001, 12:14:00 AM

You do not NEED ammonium formate for microwave CTH.  Any hydrogen donor will do, formate salts work well and are very easily made.  Saturated aromatics work well as hydrogen donors too.

Title: Re: hydrogenation via the microwave
Post by: malvaxman on October 21, 2001, 04:00:00 PM

All mighty Rhodium please answer:
What yeld is to be expecteted in microwave hydrogenation when turning a imine to amine?

Title: Re: hydrogenation via the microwave
Post by: Rhodium on October 21, 2001, 09:20:00 PM

I don't know exactly. It depends on your technique and the substrate. There is no question 90%+ yields are possible in a professional setting.