Research Article

Preparation and Characterization of Di-, Tri-, and Tetranuclear Schiff Base Complexes Derived from Diamines and 3,4-Dihydroxybenzaldehyde

Table 4

Chemical shifts (ppm) for 13C NMR of Schiff bases EDH4 and MPDH4 in DMSO.

CompoundChemical shifts (ppm)Assignments

EDH460.99Carbon of CH2
113.6–161.2Aromatic carbons
167.2Carbon of HC=N

MPDH419.8, 20.1Carbon of methyl group
110.8–146.8Aromatic carbons
150.6, 152.7Carbon of HC=N