Dicyanamido-metal(II) complexes. Part 6: 1D polymeric copper(II) complexes bridging by dicyanamide. Effect of copper(II) salt on the nature of the polymeric product

Massoud, Salah S.; Lemieux, Marcie M.; Quan, Lucie Le; Vicente, Ramón; Albering, Jörg; Mautner, Franz-Andreas

doi:10.1016/j.ica.2012.03.009

Cited by 22 publications

(5 citation statements)

References 78 publications

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“…The biting angle of N(1)-Cu(1)-N(5) is 115.24(5)°, larger than the angle of tetrahedral geometry, presumably due to the large ring constraint of the eight-member ring. The bond lengths of Cu atom to the N atoms of two pyrazole fragments are at 2.026(14) Å and 2.036(15) Å, consistent with the literature [39,40]. The bond lengths of Cu(I) atom to acetonitriles associate also in normal range (ca.…”

Section: Molecular Structures Of Compounds 1 4 Andsupporting

confidence: 87%

Synthesis and characterization of copper(I) compounds incorporating pyrazole-derived ligands: A study on carbon–carbon coupling reaction

Lien

Vinayagam

et al. 2015

Inorganica Chimica Acta

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Section: Molecular Structures Of Compounds 1 4 Andsupporting

confidence: 87%

Synthesis and characterization of copper(I) compounds incorporating pyrazole-derived ligands: A study on carbon–carbon coupling reaction

Lien

Vinayagam

et al. 2015

Inorganica Chimica Acta

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“…Nevertheless, a judicious choice of the appropriate bridging ligand seems to be a key step for synthesis of such polymeric assemblies . In this respect, pseudohalide anions such as NCO ¯ , NCS ¯ , N 3 ¯ , N(CN) 2 ¯ , or C(CN) 3 ¯ have been widely proven to be versatile bridging ligands that can link two or more paramagnetic metal ions in different modes generating a great variety of coordination networks. − The most comprehensive literature refers to the azide ligands. Normally, ferromagnetic coupling is mediated by the end-on bridging mode, whereas antiferromagnetic interaction occurs through the end-to-end coordination, theoretical calculations by different methodologies being carried out to establish the relationship between the azide bridging mode and the nature of the magnetic coupling. ,− …”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Coupling Through the End-to-End Thiocyanate Bridge in Cobalt(II) and Nickel(II) Chains

Palion-Gazda

Machura

Lloret

et al. 2015

Crystal Growth & Design

106

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The preparation, spectroscopic characterization, and X-ray crystal structure of two novel one-dimensional compounds of formula [MII(tppz)(NCS)(μ-1,3-NCS)] n [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and M = Co(1) and Ni (2)] are reported. 1 and 2 are isomorphous compounds, and they crystallize in the P21/n space group. Their structures are made up of zigzag chains of cobalt(II) (1) and nickel(II) ions (2) bridged by single end-to-end thiocyanate groups with a tridentate tppz molecule and a terminally bound thiocyanate-N ligand achieving distorted MN5S octahedral surroundings around each metal center. The main source of the distortion of the ideal octahedron is due to the geometrical constraints issued from the occurrence of two fused five-member chelate rings of the tridentate tppz ligand, the values of the N–M–N bond angles covering the range 75.58(9)–78.66(9)°. The M–N bond lengths vary in the range 2.025(3)–2.116(29 (1) and 2.001(2)–2.079(2) Å (2), and they are shorter than the M–S bond distance [2.6395(10) (1) and 2.5225(9) Å (2)]. The values of the intrachain metal–metal separation are 6.4197(7) (1) and 6.3257(5) Å (2). The magnetic properties of 1 and 2 have been investigated in the temperature range 1.9–300 K. Both compounds exhibit intrachain ferromagnetic interactions with values of the magnetic coupling (J) of +4.60 (1) and +7.82 cm–1 (2) [the spin Hamiltonian being defined as Ĥ = −JΣ i = 1 n–1 Ŝ i Ŝ i+1].

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“…A compararison with the metal‐metal distance of similar systems, reveals that the complex units in the dicyanamido polymer are more closer and this is attributed to the intrachain hydrogen bonding between the hydrogen atom, H(12B) borne on methyl carbon and the chlorine atom, Cl(1) (Table S5, Figure S2).…”

Section: Resultsmentioning

confidence: 99%

Structural Insights and Third Order NLO Studies of Pseudohalide‐ Based Polymeric and Monomeric Congeners of Halo‐Substituted Parent Schiff Bases

et al. 2018

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The present work focuses on the pseudohalide embodied copper(II) complexes of a tridentate Schiff base (HL) derived from N,N‐dimethylethylenediamine and 3,5‐dichloro‐2‐hydroxyacetophenone. Of them, two are coordination polymers and rest are monomers. The azide in the complex [Cu(L)(N3)]n, adopts an end‐on coordination mode begetting a trans helical propagation while the end‐to‐end bonding fashion of the dicyanamide in [Cu(L)[N(CN)2]n, fostered a meso‐helical chain. The interplay of covalent & non‐covalent forces develop the complexes into supramolecular architectures. Similar forces stitch the monomeric cyanato and thiocyanato complexes to chains. Quantification of intermolecular forces was achieved by surface analysis along with fingerprint plots. Charge‐transfer bands exhibit negative solvatochromic effect while the influence of the solvents on the geometry of the complexes is based on d‐d bands. Further, fluorescence and thermal studies were also done. The third order non‐linear optical (NLO) response of the complexes were recorded. Open aperture scan showed a positive NLO absorption coefficient and closed scan, a negative non‐linear refractive effect. A predominant refractive effect of the complexes make them ideal for optical switching applications.

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Dicyanamido-metal(II) complexes. Part 6: 1D polymeric copper(II) complexes bridging by dicyanamide. Effect of copper(II) salt on the nature of the polymeric product

Cited by 22 publications

References 78 publications

Synthesis and characterization of copper(I) compounds incorporating pyrazole-derived ligands: A study on carbon–carbon coupling reaction

Synthesis and characterization of copper(I) compounds incorporating pyrazole-derived ligands: A study on carbon–carbon coupling reaction

Ferromagnetic Coupling Through the End-to-End Thiocyanate Bridge in Cobalt(II) and Nickel(II) Chains

Structural Insights and Third Order NLO Studies of Pseudohalide‐ Based Polymeric and Monomeric Congeners of Halo‐Substituted Parent Schiff Bases

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