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Pseudohalide-Controlled Assemblies of Copper-Schiff Base Complexes with an Encapsulated Sodium Ion: Synthesis, Crystal Structure, and Computational Studies

Maiti, Monami
•
Sadhukhan, Dipali
•
Thakurta, Santarupa
altro
Mitra, Samiran
2013
  • journal article

Periodico
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Abstract
Three new hetero-bimetallic coordination complexes [Na-(CuIIL1)2](ClO4)·0.5H2O (1), [Na(CuIIL2)2][CuI2(μ1,3-NCS)3]n (2), and {[Na(CuIIL3)2](μ1,5-dca)}n (3; dca = dicyanamide) have been synthesized by using different Schiff base ligands [e.g., L1H2 = N,N=-bis(3-methoxysalicylidenimino)-1,3-diaminopentane, L2H2 = N,N=-bis(3-ethoxysalicylidenimino)- 1,3-diaminopropane, and L3H2 = N,N=-bis(5-bromo-3-methoxysalicylidenimino)-1,3-diaminopropane] in the presence of pseudohalide coligands N3–, SCN–, and N(CN)2– (dca),respectively. The ligands and the complexes have been characterized by microanalytical and spectroscopic techniques. The structures of the complexes, determined by single-crystal X-ray diffraction studies, show that in all cases a trinu-clear Na(CuIIL)2 unit is formed, but of different configurations. 1 does not include N3– anions. In contrast, in 2, SCN– extrudes partial in situ reduction of CuII to lead to the formation of an infinite [CuI 2(μ1,3-NCS)3]n anionic chain; and in 3, N(CN)2– bridges the metal–ligand assemblies to form a 1D polymeric chain. ESI-MS, UV/Vis spectroscopy, and cyclic voltammetry were performed to investigate the solution-state behavior of the complexes. Theoretical calculations of the optimized geometries of the complexes were carried out at the BLYP/DNP level to determine their relative stabilities from the HOMO–LUMO gap and chemical softness values.
DOI
10.1002/ejic.201200916
WOS
WOS:000316290700007
Archivio
http://hdl.handle.net/11368/2829490
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84872873221
Diritti
metadata only access
Soggetti
  • Cluster compounds, N,...

Scopus© citazioni
20
Data di acquisizione
Jun 14, 2022
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Web of Science© citazioni
20
Data di acquisizione
Mar 21, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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