The following ligands are supposed to be grouped by the donor atom observed
in typical mononuclear complexes; i.e. ligands in each group should contain
the same donor atom or atoms. Which group is incorrect?
a Acetonitrile; bipyridine; ethane-1,2-diamine.
b Pyridine; ammonia; cyanide.
c Acetylacetonate; oxalate; THF.
d Water; THF; oxalate.
