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Table 5 1H and 13C NMR signals of OBH and its diamagnetic complexes

From: Spectral, thermal, molecular modeling and biological studies on mono- and binuclear complexes derived from oxalo bis(2,3-butanedionehydrazone)

Compound NH CH3 13C signals
OBH 11.924 (s, 2H) 2.129 (s, 6H) 196.65 (C=O)ketonic 167.58; (C=O)amidic 148.81 (C=N) 23.90 (CH3)
[Zn(OBH–H)2] 11.781 (s, 1H) 11.565 (s, 1H) 2.371 (s, 3H) 2.118 (s, 3H) 196.68 (C=O)ketonic 168.02 (C=O)amidic free 166.21 (C=O)amidic bonded 149.44 (C=N), (C=N)* 23.94 (CH3)
[VO(OBH-H)2]·H2O 11.769 (s, 1H) 2.087 (s, 3H) 2.053 (s, 3H) 197.12 (C=O)ketonic 172.50 (C=O)amidic (free) 168.44–167.47 (C=O)amidic (bonded) 149.60–148.86 (C=N), (C=N)* 124.68 (C–O) 24.68; 24.98 (CH3)
[Pd2(OBH)(H2O)2Cl4]·2H2O 11.766 (s, 1H) 11.566 (s, 1H) 2.290 (s, 6H) 196.75 (C=O)ketonic 167.98; (C=O)amidic 148.88 (C=N) 22.90 (CH3)
  1. *New azomethine group as a result of enolization