Loading…
Synthesis, multinuclear magnetic resonance and crystal structures of Pt(II) complexes containing amines and bidentate carboxylate ligands
A novel synthetic method for the synthesis of Pt(II) complexes of the type cis-Pt(amine) 2R(COO) 2 is reported. The compounds were characterized by multinuclear ( 195Pt, 1H and 13C) magnetic resonance spectroscopy. The crystal structure of a silver intermediate Ag 2(1,1-cyclobutyldicarboxylato) has...
Saved in:
Published in: | Inorganica Chimica Acta 2006-09, Vol.359 (12), p.4095-4104 |
---|---|
Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | A novel synthetic method for the synthesis of Pt(II) complexes of the type
cis-Pt(amine)
2R(COO)
2 is reported. The compounds were characterized by multinuclear (
195Pt,
1H and
13C) magnetic resonance spectroscopy. The crystal structure of a silver intermediate Ag
2(1,1-cyclobutyldicarboxylato) has shown that the compound has an extended structure with metal–metal bonds. The crystal structure of three complexes Pt(amine)
2R(COO)
2 especially with ethylenediamine derivatives are reported.
A novel synthetic method for the synthesis of the complexes
cis-Pt(amine)
2R(COO)
2 is compared to two other methods involving the use of either barium dicarboxylate or sodium carboxylate. Pt(II) compounds with monodentate and bidentate amines were studied. The reaction involves the use of a silver dicarboxylato complex, which is the intermediate in the new synthetic procedure. The crystal structure of the silver intermediate with the ligand 1,1-cyclobutanedicarboxylate (1,1-CBDCA) was determined by X-ray diffraction. The crystal Ag
2(1,1-CBDCA) has a very interesting 3-D extended structure. The complexes
cis-Pt(amine)
2R(COO)
2 were studied in solution by multinuclear (
1H,
13C and
195Pt) magnetic resonance spectroscopy, but the solubilities are very low. D
2O was found to be the best solvent. In
195Pt NMR, the complexes containing bidentate amines forming five-membered chelates were observed at higher fields than those containing monodentate amines. The resonances of the NH
3 compounds were also found at lower fields than the primary amine complexes. All the dicarboxylato ligands form six-membered chelates except 1,2-CBDCA, whose Pt(II) compounds were observed at lower fields than the others. The crystal structures of Pt(en)(1,1-CBDCA), Pt(Meen)(1,1-CBDCA) and Pt(en)(benzylmalonato) were confirmed by X-ray diffraction methods. Several compounds are disordered. The crystals are stabilized by intermolecular hydrogen bonds between the –NH
2 groups and the carboxylato O atoms. |
---|---|
ISSN: | 0020-1693 1873-3255 |
DOI: | 10.1016/j.ica.2006.04.014 |