Synthesis and characterization of several rhenium(I) complexes of 2-acetylpyridine and ferrocenyl carbaldehyde derivatives of 2-hydroxybenzoic acid hydrazide
The rhenium(I) carbonyl halide (X = Cl and Br) complexes of the ligands derived from 2-acetylpyridine and ferrocenyl carbaldehyde derivatives of 2-hydroxybenzoic acid hydrazide have been prepared. The ligand forms a five-membered chelate ring but in the pyridine ligands it is Npyridine,N′-bidentate...
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| Published in: | Journal of organometallic chemistry Vol. 694; no. 19; pp. 3102 - 3111 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-09-2009
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | The rhenium(I) carbonyl halide (X
=
Cl and Br) complexes of the ligands derived from 2-acetylpyridine and ferrocenyl carbaldehyde derivatives of 2-hydroxybenzoic acid hydrazide have been prepared. The ligand forms a five-membered chelate ring but in the pyridine ligands it is Npyridine,N′-bidentate while it is O,N-bidentate in the ferrocene complexes.
The rhenium(I) carbonyl halide (X
=
Cl and Br) complexes, [ReX(CO)
3{H
2(py)L
2}] (
1a,
1b) and [ReX(CO)
3{H
2(Fc)L
2}] (
2a,
2b), of the ligands derived from 2-acetylpyridine and ferrocenyl carbaldehyde derivatives of 2-hydroxybenzoic acid hydrazide [H
2(py)L
2 and H
2(Fc)L
2, respectively] have been prepared in good yield. The complexes have been characterized by elemental analysis, MS, IR, UV–Vis and
1H NMR spectroscopic methods and their structures have been elucidated by X-ray diffraction. The ligand forms a five-membered chelate ring but in H
2(py)L
2 it is N
pyridine,N′-bidentate while it is O,N-bidentate in H
2(Fc)L
2 complexes.
Reaction of complex
1a with copper(II) nitrate yields the unexpected aqua complex [Re{H(py)L
2}(H
2O)(CO)
3] (
3) where the ligand is monodeprotonated but maintains the coordination mode observed in
1a, as shown by X-ray diffraction. However, reaction of
1b with glycine yields a conformational polymorph of the original compound,
1b′. The X-ray study shows that the orientation of the O–H phenol group against the carbonyl amide group is the main difference. |
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| ISSN: | 0022-328X 1872-8561 |
| DOI: | 10.1016/j.jorganchem.2009.05.032 |