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Variable Coordination Behavior of New Hybrid Pyrazole Ligand: Synthesis and Characterization of Several ZnII, CdII, HgII, PdII, PtII, and NiII Complexes.

Variable Coordination Behavior of New Hybrid Pyrazole Ligand: Synthesis and Characterization of Several ZnII, CdII, HgII, PdII, PtII, and NiII Complexes.

Authors :
Guerrero, Miguel
Pons, Josefina
Parella, Teodor
Font-Bardla, Mercè
Calvet, Teresa
Ros, Josep
Source :
Inorganic Chemistry. 9/21/2009, Vol. 48 Issue 18, p8736-8750. 15p.
Publication Year :
2009

Abstract

In this paper we describe the synthesis of the new mixed-donor ligand 1,8-bis(3 5-dimethyl-1H-pyrazol-1-yl)-3,6-dioxaoctane (L). The complexes [MCl2(L)] (M=ZnII (1), CdII (2), HgII (3), PdII (4), PtII (6), NiII (7)) and [PdCI2(L)]2 (5) were prepared and fully characterized. X-ray crystal structures of complexes 1, 2, 4, 6, and 7 have been determined, The L ligand behaves either as a NN-bidentate (chetate or bridge) and NOON-tetradentate (equatorial or planar) ligand. In these structures, C-H⋯X(X=O, N or Cl/Cl-) intermolecularinteractions have been identified and studied. Moreover, the 113Cd(¹H), 195Pt(¹H), and 199Hg(¹H) NMR spectra were measured to investigate the coordination environment of the metal in solution. Diffusion NMR studies have also been performed to characterize monomeric and dimeric species of PdII. Finally, we have observed that the dimeric complex 5 is converted into the corresponding monomeric complex 4. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00201669
Volume :
48
Issue :
18
Database :
Academic Search Index
Journal :
Inorganic Chemistry
Publication Type :
Academic Journal
Accession number :
44407870
Full Text :
https://doi.org/10.1021/ic900908n