Synthesis, Crystal Structure and DFT Studies of a New Dinuclear Ag(I)-Malonamide Complex

The synthesis and structural aspects of a new dinuclear silver (I) complex with malonamide type ligand ( ) is reported. Each Ag ion in the [ complex is coordinated to two ligands, , each acting as a bridged ligand via its two pyridine arms; Ag(I) acts as a connector between them. Two types of Ag-lig...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2018-04, Vol.23 (4), p.888
Main Authors: Soliman, Saied M, Barakat, Assem, Islam, Mohammad Shahidul, Ghabbour, Hazem A
Format: Article
Language:English
Subjects:
AIM
Anions
Chemical bonds
continuous shape measure
Coordination Complexes - chemical synthesis
Coordination Complexes - chemistry
Crystal structure
Crystallography, X-Ray
Ligands
malonamide
Malonates - chemistry
Models, Molecular
Molecular chains
Molecular Structure
NBO
Pyridines
Silver
silver (I) complex
Silver - chemistry
Surface analysis (chemical)
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Summary:The synthesis and structural aspects of a new dinuclear silver (I) complex with malonamide type ligand ( ) is reported. Each Ag ion in the [ complex is coordinated to two ligands, , each acting as a bridged ligand via its two pyridine arms; Ag(I) acts as a connector between them. Two types of Ag-ligands close contacts were detected: Ag-N1, Ag-N4 from the two units, and Ag-O5, Ag-O6 from the two nitrate anions, wherein both the nitrate ions are inside the cage formed by the unit. The coordination geometry around each Ag(I) is a distorted tetrahedron. The ] complex units are connected by weak intermolecular C-H…O interactions. The different intermolecular interactions were quantified using Hirshfeld surface analysis. Using two DFT methods (B3LYP and WB97XD), the nature and strength of the Ag-N and Ag-O interactions were described using atoms in molecules (AIM) and natural bond orbital (NBO) analyses. Topological parameters indicated that the strength of the two Ag-N bonds was similar, while that of the two Ag-O interactions were significantly different. Moreover, the Ag-N interactions have a predominant covalent character, while the Ag-O interactions are mainly ionic. The NBO analysis indicated that the most important anti-bonding Ag-orbital in these interactions has an s-orbital character.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules23040888