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

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)