Table 3: NMR spectral signals (δ) of complex (CLrtT).

     Peak/signal CLrtT(δ)
CH3−CH2−R      0.979
CH2−CH2−R      1.256
CH2−C(=O)OCu      2.354
CH2−CH2−C(=O)OCu      1.646
-NH2 (broadend peak)      4.22
-NH2 (tautomeric and weak signal)      7.84

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