Mr. Kayode,
In CH3CN but adding NaOH under heating at 100-150oC (1-2h). We have isolated and reported crystals of CuII-Gly.
thanks so much ma will try it out. may i ask the molarity of the NaOH used. thanks
Mr. Kayode,
This depends on how you shall prepare your solution of NaOH in CH3CN.
There are different procedures in the literature. Despite which one of them you shall use, you have to recalculate the molarity of NaOH. The exact concentration you should obtain by potentiometric titration with HCl. Details can be found in Ref. 1. So, instead perchloric acid there is used HCl for NaOH. The new pH scale should be taken.
The molar ratio Gly:NaOH should be 1:1.
NB! Each NaOH-CH3CN solutions should be newly prepared directly before the synthesis of the complex.
Ref. 1. Acid-base equilibria in acetonitrile mixtures: Selection of conditions of titration of bases, J. Electroanal. Chem. Interfac. Electrochem. 57 (1974) 97, G. Velinov, D. Ivanov, O. Budevsky.
You can easily get copper(II)-hydroxy-carbonate in the market. Add the glycine (0.2 - 0.5 M) in Me2-acetamide or DMSO (weak chelating solvents) and let it stand for a month. Nice xtals form within the Cu(OH)CO3, don't stir.. Glycine NH3-CH2-COO- comes as switterion, no counterion left, Na+ or Cl- . No worries.
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