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Table 4 IR band assignments of OBH and its complexes

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

Compound

ν(NH)

ν(C=O)

ν(C=N)

ν(C=N)a

ν(C–O)

ν(M–O)

ν(M–N)

Observations

OBH

3325 (s)

1701 (s)

1605 (m)

 

[Co(OBH)2Cl]Cl.½EtOH

3325 (m)

1699 (s)

1612 (w)

464 (m)

3415 (br) for EtOH

[Zr(OBH)Cl4]·2H2O

3326 (vbr)a

1686 (m)

1585 (m)

495 (br)

 

[Zn(OBH–H)2]

1699 (s)

1605 (w)

1550 (w)

1140 (w)

463 (s)

 

[VO(OBH–H)2]·H2O

1696 (s)

1608 (w)

1552 (w)

1142 (w)

463 (m)

3412 (br) for H2O; ν(V=O) at 961

[Cu(OBH)2Cl2]·2H2O

3325 (m)

1701 (s)

1610 (br)

464 (m)

3415 (br) for H2O

[Ni2(OBH)Cl4]·H2O·EtOH

3324

1676 (br)

1552 (sh)

464 (m)

539

3389 (br) for H2O

[Pd2(OBH)(H2O)2Cl4]·2H2O

3327 (w)

1644

1542

467

542

3441 (br) for H2O

  1. aThe value for NH and H2O