Making of Cu(acac)2, Ni(acac)2.

2 eq. of acetylacetone + 2eq. of NaOMe in MeOH
then CuCl2 2H2O 1eq. in MeOH added slowly at rt.
color changed immediately from green to blue when you add CuCl2 into the solution.
1hr, then concentrated. DCM added to dissolve cu(acac)2. fitered. then concentrated.
Can be recrystallized in MeOH/DCM.

the blue solid can dissolve in DCM, chloroform. can't dissolve in water, very limited solubility in MeOH.
H-NMR is a crab. you can't see any sharp peaks. only a broad peak at about 1 ppm.
IR can be used to characterized it.
Ni(acac)2 can be made similarly.