Synthesis and characterization of Pd(II), Pt(II), Cu(I), Ag(I) and Cu(II) complexes with N,O-hybrid pyrazole ligand

Guerrero, Miguel; Calvet, Teresa; Font-Bardı́a, Mercè; Pons, Josefina

doi:10.1016/j.poly.2016.09.004

Cited by 14 publications

(12 citation statements)

References 58 publications

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“…In the [Cu(L 4 ) 2 (CH 3 OH) 2 ] 2 + unit, the O(3)À Cu (2) (5), 1.920(4) ]i nIV is shorter,w hereas the Cu(2)ÀN(3) distance [2.036(5) ]i nIV is longer than the Cu(2)ÀN(1) distance [2.017(4) ]i nII.T hese results might be attributablet ot he changes in heterocyclic structure (morpholine in place of pyrrolidine) in L 4 and L 2 . (3), Cu(2)ÀN(1) 2.017(4), Cu(1)ÀCl(1) 2.2607 (16), Cu(1)ÀCl(2) 2.2350(13); O(1)#2ÀCu(2)ÀO(1) 180.00, O(1)ÀCu(2)ÀN(1) 94.30 (14), O(1)ÀCu(2)ÀN(1)#2 85.70 (14), Cl(2)ÀCu(1)ÀCl(1) 99.29 (7), Cl(2)ÀCu(1)ÀCl(1)#1 130.42(6), Cl(1)#1À Cu(1)ÀCl(1) 102.18(11), Cl(2)ÀCu(1)ÀCl(2)#1 99.72(8), N(2)ÀO(1)ÀCu(2) 123.0(3), C(5)ÀN(1)ÀCu(2)120.7(3),C (1)ÀN(1)ÀCu (2) (5), Cu(1)ÀO(2)1.942 (5),Cu(1)ÀN(1) 1.998(6), Cu(1)ÀN(3) 1.996(6), Cu(1)ÀCl(1) 2.717(2), Cu(2)ÀCl(2) 2.238(2), Cu(2)ÀO(5)1.882 (5) ;O(2)ÀCu(1)À O(1) 163.6(2), N(1)ÀCu(1)ÀN(3) 178.3(2), O(2)ÀCu(1)ÀN(1) 93.7(2), O(1)À Cu(1)ÀN(1) 86.8(2), O(2)ÀCu(1)ÀN(3) 85.2(2), O(1)ÀCu(1)ÀN(3) 93.9(2), O(2)À Cu(1)ÀCl(1) 101.58 (15), O(1)ÀCu(1)ÀCl(1) 94.78 (14), N(1)ÀCu(1)ÀCl(1) 87.24 (16), Cl(2)#1ÀCu(2)ÀCl(2) 180.0, O(5)ÀCu(2)ÀCl(2) 90.60 (19), O(5)ÀCu(2)À Cl(2)#1 89.40(19). (5), Cu(1)ÀN(1) 2.021(6), Cu(2)ÀO(3)1.920(4), Cu(2)ÀN(3) 2.036 (5), Cu(3)ÀCl(1) 2.249(2), Cu(3)ÀCl(2) 2.274(2), Cu(3)ÀCl(3) 2.290(2),C u(3)ÀCl(4) 2.274(2);O(1)#2ÀCu(1)ÀO(1) 180.00,O(1)ÀCu(1)ÀN(1) 92.9(2), O(1)ÀCu(1)À N(1)#2 87.1(2), O(3)#1ÀCu (2) (19), Cl(1)ÀCu(3)ÀCl(2) 110.44(10),Cl(1)ÀCu(3)ÀCl(4) 107.58(9), Cl(2)ÀCu(3)ÀCl(4) 113.19(9),C l(1)ÀCu(3)ÀCl(3) 112.34(9), Cl(2)À Cu(3)ÀCl(3) 104.66(9), Cl(4)ÀCu(3)ÀCl(3) 108.69(8).…”

Section: Crystals Tructuresmentioning

confidence: 99%

“…[12] Ferrer'sgroup described the reaction of symmetric bis(picolinamido)-1,2,4-triazole ligandsw ith coppersalts that afforded hexanuclearc opper complexes with well-defined antiferromagnetic behavior;t he central Cu atoms of these complexes were, chelated by two nitrogen atoms and two carbonyl oxygen atoms. [13] Pons's group has synthesized 2-(3,5-diphenyl-1H-pyrazol-1-yl)ethanol [14] and 2-(3,5-dipyridyl-1H-pyrazol-1-yl)ethanol [15] to prepare the corresponding N, O-, or N,N'-coordinated copper complexes.T hese N,O-or N,N-bidentatel igands were easily prepareda nd their structural diversity was obvious. These ligandsp romoted greatly the chemistry of these copper complexes.Ritter and co-workersreported the synthesis of palladium(II)c omplexes with N-(2-pyridylmethyl)pyrrolidine-Noxide as the N,O-bidentate chelating ligand and their catalytic application in CÀHa mination reactions.…”

Section: Introductionmentioning

confidence: 99%

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Four N,O‐Bidentate‐Chelated Ligand‐Tunable Copper(II) Complexes: Synthesis, Structural Characterization and Exceptional Catalytic Properties for Chan–Lam Coupling Reactions

et al. 2018

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Four N,O-bidentate chelating ligands [L 1 = N-(4thiazolylmethyl)morpholine-N-oxide, L 2 = N-(2-pyridylmethyl)pyrrolidine-N-oxide, L 3 = N-(4-thiazolylmethyl)pyrrolidine-Noxide, and L 4 = N-(2-pyridylmethyl)morpholine-N-oxide] were designed and synthesized. The treatment of N,O-bidentate ligands with CuCl 2 in ethanol at room temperature afforded four new copper complexes-[Cu(L 1 ) 2 ]Cl 2 ([Cu(L 4 ) 2 (CH 3 OH) 2 ][CuCl 4 ] 2 (IV)-which were fully characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental analyses. Most interestingly,t he single-crystal Xray diffraction analyses revealed that the N,O-bidentate ligands L 1 -L 4 can tune the corresponding geometry configu-ration of coppera toms in complexes I-IV.T he copper atoms in I and II showed four-coordinated distorted squarep lanar geometry,w hereas the central coppera tom in III adopted a distorted square pyramidal geometry.I ts hould be noted that complex IV was constructed by ad istorteds quare planar CuN 2 O 2 unit, one octahedral CuN 2 O 4 unit and two [CuCl 4 ] 2À anions. Importantly,t hese copper(II) complexes, especially complex IV,s howedh igh catalytic activity in Chan-Lam coupling reactions of primary or secondary amines with arylboronic acid under mild conditions. Substrates with many functionalg roups were tolerated and the C-N coupling products were afforded in good to excellent yields (up to 96 %y ield).[a] Dr.

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Section: Crystals Tructuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Four N,O‐Bidentate‐Chelated Ligand‐Tunable Copper(II) Complexes: Synthesis, Structural Characterization and Exceptional Catalytic Properties for Chan–Lam Coupling Reactions

et al. 2018

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“…The assignments are obtained by fitting the observed spectra to the TanabeSugano diagram. Thus these bands may be assigned to following transitions: [50][51][52] . Ligand Field Parameters: The experimentally observed transition energies are used to calculate the values of parameters B, C, Dq and β.…”

Section: Electronic Spectra Of Mn(ii) Complexes Of L1 L2 L3 and L4mentioning

confidence: 99%

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2017

IJPSR

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Mn(II) complexes with four semicarbazide and thiosemicarbazide based ligands such as 2-formyl pyridine semicarbazone (L 1 ), 2-formyl pyridine thiosemicarbazone (L 2 ), 5-methyl 2-formyl pyridine semicarbazone (L 3 ) and 5-methyl 2-formyl pyridine thiosemicarbazone (L 4 ) have been synthesized and characterized. All the ligands were characterized by elemental analyses, IR, 1 HNMR and mass spectral studies. The complexes were characterized by using various physicochemical techniques such as elemental analysis, molar conductance, magnetic susceptibility measurements and spectral studies such as IR, UV-visible and EPR. The complexes were found to have general compositionsThe molar conductance data of chloro and nitrato complexes of L 1 , L 2 , L 3 and L 4 suggest nonelectrolytic nature of the complexes. Therefore they may be formulated as [Mn(L) 2 X 2 ].Complexes show magnetic moment corresponding to five unpaired electrons. On the basis of IR electronic and EPR spectral data distorted octahedral geometry of complexes has been suggested. INTRODUCTION:Metal complexes of semicarbazones and thiosemicarbazones were found to show more biological activities as compared to the free semicarbazone and thiosemicarbazone 1 . In addition, the complexes can exhibit bioactivities which are not shown by the free ligands. Owing to the wide range of medicinal properties of semicarbazones and thiosemicarbazones, their metal complexes are emerging as a new class of experimenral studies. A lot of work is going on the synthesis and characterisation of transition metal complexes with semicarbazones and thiosemicarbazones 2 . The transition metal complexes of these ligands were synthesised mainly due to their pharmacological activities.

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“…In the present study, an efficient adsorbent based on β-ketoenol-pyrazole-thiophene-functionalized silica gel ( SiNPz-Th ) was successfully fabricated and characterized. 46 …”

Section: Introductionmentioning

confidence: 99%

Efficient and Environmentally Friendly Adsorbent Based on β-Ketoenol-Pyrazole-Thiophene for Heavy-Metal Ion Removal from Aquatic Medium: A Combined Experimental and Theoretical Study

et al. 2020

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A new sustainable and environmentally friendly adsorbent based on a β-ketoenol-pyrazole-thiophene receptor grafted onto a silica surface was developed and applied to the removal of heavy-metal ions (Pb(II), Cu(II), Zn(II), and Cd(II)) from aquatic medium. The new material SiNPz-Th was well characterized and confirms the success of covalent binding of the receptor on the silica surface. The effect of environmental parameters on adsorption including pH, contact time, temperature, and the initial concentration were investigated. The maximum adsorption capacities of SiNPz-Th for Pb(II), Cu(II), Zn(II), and Cd(II) ions were 102.20, 76.42, 68.95, and 32.68 mg/g, respectively, at 30 min and pH = 6. The adsorption isotherms, kinetics, and thermodynamic process were investigated and showed efficiency and selectivity toward Pb(II) and good regeneration performance. Density functional theory, noncovalent-interaction, and quantum theory of atoms in molecules calculations were used to study and to gain a deeper understanding of both the adsorption mechanism and selectivity of metal ions onto the adsorbent. Accordingly, metal ions such as Pb(II), Cu(II), and Zn(II) were bidentate coordinated with the adsorbent by nitrogen and oxygen atoms of the Schiff base C=N and hydroxyl group −OH, respectively, to form stable complexes. Whereas Cd(II) was coordinated in a monodentate fashion with oxygen atom of the hydroxyl group. Furthermore, the affinity of SiNPz-Th toward the metal ions was decreased in the order of Pb(II) > Cu(II) > Zn(II) > Cd(II), in good agreement with the experimental results. All these results highlight that SiNPz-Th has good potential to be an advanced adsorbent for the removal of lead ions from real water.

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Synthesis and characterization of Pd(II), Pt(II), Cu(I), Ag(I) and Cu(II) complexes with N,O-hybrid pyrazole ligand

Abstract: The coordination behavior of N,O-hybrid pyrazole-based metal-organic frameworks are 3

Cited by 14 publications

References 58 publications

Four N,O‐Bidentate‐Chelated Ligand‐Tunable Copper(II) Complexes: Synthesis, Structural Characterization and Exceptional Catalytic Properties for Chan–Lam Coupling Reactions

Four N,O‐Bidentate‐Chelated Ligand‐Tunable Copper(II) Complexes: Synthesis, Structural Characterization and Exceptional Catalytic Properties for Chan–Lam Coupling Reactions

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Efficient and Environmentally Friendly Adsorbent Based on β-Ketoenol-Pyrazole-Thiophene for Heavy-Metal Ion Removal from Aquatic Medium: A Combined Experimental and Theoretical Study

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