Chemical Forums
Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: lovelyangle on September 25, 2007, 04:55:08 PM
-
hi
we synthesis cr(acac)3 and i want your help to answer some questions about it >>
1 - why is NaOH not used (instead of urea) to make the solution basic ?
2- how does urea make the solution basic ?
3- why was a steam bath used to heat the reaction flask instead of a direct flame ?
please help me
>>
-
1. NaOH decomposes complex
2. http://www.colby.edu/chemistry/Grants/CH141L4Crfall2002.pdf
3. Safety
-
thx
how i can improve the percentage yeild ??
>>
-
Usuallay an excess of acac is used
-
acac is acetylacetonate. The complex would hydrolyse if you use NaOH, hence urea is used. Read why -NH2 group has basicity.
acac complexes usually give high yields. I have prepared acac complexes of many metals, and had no issues of yield. You always use slight excess of the ligands while making organometallic complexes.
-
hi
we synthesis cr(acac)3 and i want your help to answer some questions about it >>
1 - why is NaOH not used (instead of urea) to make the solution basic ?
2- how does urea make the solution basic ?
3- why was a steam bath used to heat the reaction flask instead of a direct flame ?
please help me
>>