Synthesis and characterization of new oligomeric and polymeric complexes based on the [CuII(bpca)]+ unit [Hbpca=bis(2-pyridylcarbonyl)amine]

Carlucci, Lucia; Ciani, Gíanfranco; Maggini, Simona; Proserpio, Davide M.; Sessoli, Roberta; Totti, Federico

doi:10.1016/j.ica.2011.07.017

Cited by 14 publications

(8 citation statements)

References 88 publications

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“…The Cu–N bpca bond distances vary in the range of 1.939(2)–2.023 (2) Å, with the inner amidate bond length being shorter than the outer pyridine ones. These values agree with those reported previously for several [bis(2-pyridylcarbonyl)]copper(II) complexes. ,,,− The reduced bite of the two fused five-membered chelate rings subtended at the copper(II) ion by the tridentate bpca ligand accounts for the significant deviation of the values of the N2–Cu1–N3 [81.71(9)°] and N3–Cu1–N4 [82.17(9)°] bond angles from the ideal value of 90° corresponding to an octahedral surrounding. For more details about bond and angles in 2 see Table S2 in the Supporting Information.…”

Section: Resultssupporting

confidence: 90%

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

Oliveira¹,

Pinheiro²,

Costa

et al. 2016

Crystal Growth & Design

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This work deals with the crystal engineering features of four related copper(II)-based compounds with formulas {[{Cu(bpca)} 2 (H 2 ppba)]·1.33dmf·0.66dmso} n (2), [{Cu(bpca)(H 2 O)} 2 (H 2 ppba)] (3), [{Cu(bpca)} 2 (H 2 ppba)]·dmso (4), and [{Cu(bpca)} 2 (H 2 ppba)]·6H 2 O (5) [H 4 ppba = N,N'-1,4-phenylenebis(oxamic acid) and Hbpca = bis(2-pyridylcarbonyl)amide] and how their distinct molecular and crystal structures translate into their different magnetic properties. 2 and 3 were obtained through the hydrolytic reaction of the double-stranded oxamato-based dipalladium(II) paracyclophane precursor of formula [{K 4 (H 2 O) 2 }{Pd 2 (ppba) 2 }] (1) with the mononuclear copper(II) complex, [Cu(bpca)(H 2 O) 2 ] + , either in a water-dmso-dmf solvent mixture or in water, respectively. The straightforward reaction of the neutral H 4 ppba molecule with [Cu(bpca)(H 2 O) 2 ] + in a water-dmso mixture afforded compound 4 whereas compound 5 resulted from the reaction between the copper(II) complex and the K 2 ppba salt in water. The [Pd 2 (ppba) 2 ] 4-tetraanionic unit, which is present in 1 has a [3,3] metallacyclophane-type motif connected by two N-Pd-N bonds. This entity acts as a ligand towards partially hydrated potassium(I) cations through its outer oxamate oxygens leading to a neutral 3D network. The structure of 2 consists of neutral chains made up by double oxo(carboxylate-oxamate)-bridged di[{bis(2-pyridylcarbonyl)amidate}copper(II)] units are which connected by the extended H 2 ppba 2-ligand, each of its oxamate fragment adopting a bidentate/outer monodentatecoordination mode. Compounds 2-5 are neutral and centrosymmetric dicopper(II) complexes which have in common the presence of peripheral bpca ligands and H 2 ppba 2-as a bridge with each of its monoprotonated oxamate groups exhibiting a rare monodentate (3) and bis-bidentate (4 and 5) coordination modes. Compounds 2, 4 and 5 share the same basic [{Cu(bpca)} 2 (H 2 ppba)] unit, but besides the difference in cocrystallization solvent molecules and synthetic strategies they features very different crystal structures. To better understand the role of palladium(II) ions in the formation of 2 and 3, some studies were carried on using different mixtures of solvents such as water, dmso and dmf which revealed a major importance of dmf in the formation of 2 and the dependence on the palladium(II) ions in the formation of 3. A reaction pathway leading to the formation of 2 and 3 is then proposed. The variable-temperature (2.0-300 K) magnetic susceptibility measurements of 2, 4, and 5 revealed the occurrence of weak -[J = +0.70 cm -1 (2)] and antiferromagnetic interactions [J = -0.90 (4) and -0.79 cm -1 (5)], the spin Hamiltonian being defined as H = -J S 1 . S 2 . The different nature and strength of the magnetic coupling along this unique series of compounds are discussed in the light of the structural data and they are compared with those of related dicopper(II) systems.

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Section: Resultssupporting

confidence: 90%

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

Oliveira¹,

Pinheiro²,

Costa

et al. 2016

Crystal Growth & Design

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“…Interestingly these were exclusively Cu(II) complexes. The simplest examples were nitrate salts of diaqua‐(bis(2‐pyridyl carbonyl)amido)copper(II) . Removing these restrictions showed 163 complexes with the one or more such ligands and also widened the spectrum of metals involved to include Mn, Re, Fe, Ru, Co, Rh, Pd and Pt.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, characterization and immobilization of a novel mononuclear vanadium (V) complex on modified magnetic nanoparticles as catalyst for epoxidation of allyl alcohols

Azarkamanzad

Farzaneh

Maghami

et al. 2017

Applied Organom Chemis

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The 2,4,6‐tris(2‐pyridyl)‐1,3,5‐triazine (tptz) undergoes hydrolysis in the presence of VO(SO4) in an alkaline solution, affording mainly the bis(2‐pyridyl carbonyl)amid) VO2 complex, designated as [VO2(bpca)]. Single‐crystal X‐ray crystallography revealed that the coordination of V in complex is a distorted square‐pyramid coordinated with three nitrogen of bis(2‐pyridyl carbonyl)amid) ligand and two binding oxygen atoms. The prepared complex which successfully supported on modified Fe3O4 nanoparticles using tetraethylorthosilicate (TEOS) and (3‐aminopropyl)trimethoxysilane(APTMS)was designated as Fe3O4@SiO2@APTMS@[VO2(bpca)] complex (nanocatalyst). The complex and nanocatalyst were characterized by means of FT‐IR, XRD, VSM, SEM and TEM. The catalytic activity of [VO2(bpca)] complex and Fe3O4@SiO2@APTMS@complex as catalysts 1 and 2 were evaluated by the epoxidation of geraniol, 3‐methyl‐2‐buten‐1‐ol, trans‐2‐hexen‐1‐ol and 1‐octen‐3‐ol with 70–98% conversions and 95–100% selectivities. Based on the obtained results, the heterogeneity and reusability of the catalyst seems promising. In addition, the in vitro antibacterial activity of [VO2 (bpca)] complex have also been evaluated and compared to the activities of other vanadium complexes, tptz ligand and two standard antibacterial drugs, Nalidixic acid and Vancomycin.

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“…Data collection: SMART (Bruker, 2003); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT; program(s) used to solve structure: SIR97 (Altomare et al, 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenberg & Putz, 2006); software used to prepare material for publication: DIAMOND. The new ligand bis(2-quinolylcarbonyl)diimide monoanion (BQCD), formed from the quinoliny derived reduced Schiff base 4-(quinolin-2-ylmethyl)aminophenol (R-QMAP), is an important compound widely used in biological applications such as an HIV-1 protease inhibitor and in coordination chemistry (Castro et al, 1990;Castro et al, 1991;Lebon et al, 1998;Castro et al, 1999;Calatayud et al, 2000;Vangdal et al, 2002;Carlucci et al, 2011). In the synthesis of a compound from the reaction of CuBr with BQCD in ethanol with subsequent recrystallization from dimethylformamide generated the title Cu II complex [Cu(C 20 H 12 N 3 O 2 )(C 3 H 7 NO)Br] which contains the monoanionic bis(2-quinolylcarbonyl) diimide ligand (BQCD), one bromido anion and an O-bonded dimethylformamide solvent molecule.…”

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confidence: 99%

[Bis(quinolin-2-ylcarbonyl)amido-κ³N,N′,N′′]bromido(N,N-dimethylformamide-κO)copper(II)

Faizi

Sen

2014

Acta Cryst E

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In the mononuclear title complex, [CuBr(C20H12N3O2)(C3H7NO)], synthesized from the quinoline-derived reduced Schiff base 4-(quinolin-2-ylmethyl)aminophenol, the coordination geometry around Cu2+ is distorted square-pyramidal, comprising a bromide anion at the apex [Cu—Br = 2.4671 (5) Å]. The base of the pyramid is built up from one dimethylformamide O-atom donor [Cu—O = 2.078 (2) Å] and three N-atom donors from the monoanionic, tridentate bis(quinolin-2-ylcarbonyl)diimide ligand [Cu—Ndiimide = 1.941 (3) Å, and Cu—Nquinolyl = 2.060 (3) and 2.049 (3) Å]. An intramolecular C—H⋯O occurs. In the crystal, weak methyl and aromatic C—H⋯Br and formyl C—H⋯Ocarbonyl hydrogen-bonding interactions generate an overall layered structure lying parallel to (001).

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Synthesis and characterization of new oligomeric and polymeric complexes based on the [CuII(bpca)]+ unit [Hbpca=bis(2-pyridylcarbonyl)amine]

Cited by 14 publications

References 88 publications

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

Synthesis, characterization and immobilization of a novel mononuclear vanadium (V) complex on modified magnetic nanoparticles as catalyst for epoxidation of allyl alcohols

[Bis(quinolin-2-ylcarbonyl)amido-κ³N,N′,N′′]bromido(N,N-dimethylformamide-κO)copper(II)

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Synthesis and characterization of new oligomeric and polymeric complexes based on the [CuII(bpca)]+ unit [Hbpca=bis(2-pyridylcarbonyl)amine]

Cited by 14 publications

References 88 publications

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]+Cation

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]+Cation

Synthesis, characterization and immobilization of a novel mononuclear vanadium (V) complex on modified magnetic nanoparticles as catalyst for epoxidation of allyl alcohols

[Bis(quinolin-2-ylcarbonyl)amido-κ3N,N′,N′′]bromido(N,N-dimethylformamide-κO)copper(II)

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Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

Crystal Engineering Applied to Modulate the Structure and Magnetic Properties of Oxamate Complexes Containing the [Cu(bpca)]⁺Cation

[Bis(quinolin-2-ylcarbonyl)amido-κ³N,N′,N′′]bromido(N,N-dimethylformamide-κO)copper(II)