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1.
S. S. Akimov E. Yu. Matveev A. S. Kubasov G. A. Razgonyaeva K. Yu. Zhizhin N. T. Kuznetsov 《Russian Chemical Bulletin》2013,62(6):1417-1421
A reaction of the closo-decaborate anion 1,4-dioxane derivative with polyatomic alcohols (ethyleneglycol, glycerol, triethanolamine) was studied. These reactions include the ring opening of the cyclic substituent and the addition of the alcohol molecule to boron cluster through the alkoxy spacer chain. The products obtained form coordination compounds upon the reaction with gadolinium(iii) salts, playing the role of polydentate ligands. The compounds obtained were studied by IR spectroscopy, NMR spectroscopy, ESI mass spectrometry, elemental and thermographic analysis. 相似文献
2.
I. N. Ryabova 《Russian Journal of Applied Chemistry》2008,81(1):71-73
Complexation of Ni(II) and Cu(II) in aqueous solutions with anions of humic acids, extracted from naturally oxidized coal, and with their hydroxymethyl derivatives is studied spectrophotometrically and potentiometrically. The complexation stoichiometry and the stability constants of the complexes are determined. 相似文献
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《Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy》1984,40(7):597-599
The following nickel(II) complexes with 4-aminobenzophenone (L) have been prepared and investigated: NiBr2L0.67, Ni(NO3)2L, NiX2L2(X = Cl(H2O), NO3), NiCl2L3, NiX2L4(X = Br, I, BF4, ClO4(2H2O)), NiX2L6(X = BF4, NO3) and Ni(ClO4)2L8. In the NiCl2L2.H2O, Ni(NO3)2L, Ni(NO3)2L2 and Ni(NO3)2L6 complexes the ligand is H2N-coordinated. In the other complexes the coordination occurs through the carbonylic oxygen atom. Some νNiX(X = Cl, Br, I, ONO2) and νNiN bands and the νNiOH2 band of the NiCl2L2.H2O complex were assigned. 相似文献
5.
Březina František Trávníček Zdeněk Šindelář Zdeněk Pastorek Richard Marek Jaromír 《Transition Metal Chemistry》1999,24(4):459-462
Four new pseudohalide complexes of the type [NiL{N(CN)2}2] (L = N(CH2CH2NH2)3, TAA; triethylenetetramine, TTA) and [NiL{N(CN)2}]ClO4 have been prepared and characterized by spectroscopic and magnetic methods. The X-ray crystal structures of [Ni(TAA){N(CN)2}2] and [Ni(TTA){N(CN)2}2] have been determined, and analyses show that in both complexes the Ni ion posseses distorted octahedral geometry. The temperature dependence of the magnetic susceptibility of [Ni(TTA){N(CN)2}](ClO4) was measured, but no antiferromagnetic interaction was detected. 相似文献
6.
Alexey V. Nelyubin Ilya N. Klyukin Alexander S. Novikov Andrey P. Zhdanov Mikhail S. Grigoriev Konstantin Yu. Zhizhin Nikolay T. Kuznetsov 《Mendeleev Communications》2021,31(2):201-203
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7.
《Polyhedron》1987,6(6):1407-1413
Methylphosphinediacetic acid (H2G) is coordinated to nickel(II) in two different ways, depending on whether its carboxyl groups are protonated or dissociated. The acid behaves as a monodentate tertiary phosphine in that it yields a series of trans-square planar NiX2(H2G)2 complexes (X = Cl, Br, NCS or CN) which are stable in the solid state and as solutions in polar non-aqueous solvents. In neutral aqueous solution the NiG22− complex is the predominant species (logβ2 = 8.24 at 25°C and I = 0.1) even in excess nickel(II). Solid NiG·4H2O is the nickel salt of this anion, Ni[NiG2]·8H2O. The X-ray structural determination of the barium salt, BaNiG2·NaClO4·5H2O, revealed the uncommon cis-square planar arrangement around nickel with the G2− anions acting as chelating P,O-bidentate to nickel and as O-monodentate to barium. Sodium and perchlorate ions are located between the complex units and, surprisingly, cannot be removed on recrystallization. 相似文献
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Summary Nickel(II) and cobalt(II) complexes of rhodanine (Hrd) were prepared from the metal chloride or acetate and the ligand. With an excess of NH3, the octahedral [Ni(NH3)6](Rd)2 and [Co(NH3)5Rd]Rd complexes are ob-tained; use of only two NH3 equivalents per metal ion yields the Ni(Rd)2 sd HRd · NH3 and [Co(Rd)2 ] · 1.5 H2O complexes, the first with tetragonally distorted hexacoordination and the second with polymeric octahedral coordination. By using two equivalents of NaOH per metal ion, the binuclear [Ni(Rd)2][Ni(Rd)2 · (HRd)2] · 2 H2O complex is formed having one diamagnetic planar and one high spin octahedral chromophore. Rhodanine is coordinated through the thiocarbonylic sulphur in the neutral form and through the thiocarbonylic sulphur and the deprotanated nitrogen atoms in the rhodanidato anionic form. 相似文献
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Ethylenediphosphinetetraacetic acid (H4L) coordinates nickel(II) preferentially as a chelating di(tertiary phosphine). The two complexes identified in non-aqueous solutions are cis-square planar NiBr2(H4L) and square-pyramidal [NiBr2(H4L)2Br; both structures are retained in the solid state. The square planar anion NiL26? is the predominant complex in a neutral aqueous solution. A number of its solid salts M6NiL2·aq (M = Na, divalent metal) has the same square planar NiP4 core. The compound Ni2L·8H2O also belongs to this series and should be formulated as Ni3[NiL2]·16H2O: one nickel(II) is located in the NiP4 core and the remaining three are coordinated by the carboxyl group oxygen atoms and water molecules in a roughly octahedral environment. The results are based on preparative, X-ray powder, magnetic susceptibility, conductometric, UV-VIS, NMR, IR (both normal and 62Ni) and XPS spectral studies. 相似文献
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Pavlíček Marek Trávníček Zdeněk Pastorek Richard Marek Jaromír 《Transition Metal Chemistry》2003,28(3):260-264
A series of square-planar nickel(II) hexamethylenedithiocarbamate complexes with heterogeneous coordination spheres of composition [NiX(hmidtc)Y] · nCHCl3 [X = Cl, Br, I or NCS; hmi = C6H12, dtc = S2CN–; Y = PPh3 or PBu3, n = 0,1] have been synthesized and characterized by elemental analyses, i.r. and u.v.–v.i.s. spectroscopy, magnetochemical and conductivity measurements, and by thermal analysis. X-ray structures of [NiCl(hmidtc)(PPh3)] · CHCl3 and [NiBr(hmidtc)(PPh3)] · CHCl3 have been determined. 相似文献
11.
Some Ni(II) complexes with 5,7-dicloro-8-aminoquinoline (dcaq), 5,7-dibromo-8-aminoquinoline(dbaq) and 5,7-diiodo-8-aminoquinoline(diaq) are described. The compounds are of stoichiometry NiL2X2(L= dcaq, dbaq, diaq; X= NO?3 and L= dbaq; X= Cl?, Br?, I?, NCS?) and NiLX2·H2O(L= dcaq, diaq; X= Cl?). The electronic spectra and magnetic susceptibility data at room temperature, are consistent with octahedral geometry for the Ni(II) in each compound. I.r. spectra show the presence of ionic and bridging nitrate groups in the compounds NiL2(NO3)2(L= dcaq, dbaq, diaq) and we assign them polymeric structures. Polymeric structures with bridging chloride are proposed for the compounds NiLCl2·H2O(L= dcaq, diaq) and monomeric octahedral structures for NiL2X2(L= dbaq; X= Cl, Br, I, NCS). 相似文献
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The reaction of phthalic hydrazide(H2PH) with Ni(II) salts yields complexes of the type [NiHPH)2(H2O)2]2H2O(I). Reaction of this complex with acetylacetone(acac) and ethyl-enediamine(en) gives mononuclear complexes of type [NiHPH)(acac)2(H2O)]H2O(II) and [Ni(HPH)2(en)3(H2O)]H2O(IV) respectively and with monoethanolamine (MEA), aniline(An) and p-phenylenediamine(p-Phda) it gives trinuclear complexes of type [Ni3(PH)7(MEA)4 (H2O)3H2O(III), [Ni3(HPH)4(An)(H2O)7]H2O(V) and [Ni3(HPH)5(p-Phda)(H2O)7]H2O(VI) respectively. The complexes have been characterized on the basis of infrared and electronic spectra and magnetic properties as containing octahedral Ni(II) and anionic hydrazide ligand.Ligand field parameters have been calculated and compared with chromophores containing oxygen and nitrogen donor atoms. Analysis of electronic spectra, calculated Dq values and IR absorptions strongly indicate the presence of NiN2O4, NiNO5, NiO6 and NiN3O3 chromophores. 相似文献
13.
Five different complexes of nickel(II) withanti-2-furancarboxaldoxime (-FDH) have been prepared and characterized by elemental analysis, molecular weights, conductance studies, magnetic moments and infra-red spectral studies. These are [Ni(FDH)4Cl2], [Ni(FD)2(FDH)], [Ni(FD)2(FDH)2], [Ni(FD)2·en], and [Ni(FD)2]. All the complexes are neutral monomeric, paramagnetic (=3.3–3.7 B) and may be considered octahedral except the complex [Ni(FD)2], (=2.92 B) which is tetrahedral. In these complexes the ligand functions as a monodentate and/or bidentate, coordinating with furan oxygen and oxime oxygen in the latter case. The ligand has been shown to be present in the ionized, and/or unionized form in these complexes. 相似文献
14.
Summary
-N-alkylimine arylhydrazone ligand complexes of nickel(II) have been synthesised by metal template reactions. The azomethine nitrogen and the a-nitrogen of the arylhydrazone coordinate to the metal with square-planar geometry around the nickel(II) ion. Structures have been proposed based on the spectral properties of the complexes.Reprints of this article are not available. 相似文献
15.
Xavier Lefèvre 《Journal of organometallic chemistry》2011,696(4):864-870
The pincer complex [(POCOP)Ni(NCMe)][OSO2CF3] (1: POCOP = {2,6-(i-Pr2PO)2C6H3}) undergoes an acetonitrile substitution reaction in the presence of CN(t-Bu), KCN, and KOCN to give the new complexes [(POCOP)Ni{CN(t-Bu)}][O3SCF3] and (POCOP)Ni(X) (X = CN and NCO). The Ni-CN derivative is also obtained from a gradual decomposition of the Ni-CN(t-Bu) derivative, while the aquo derivative [(POCOP)Ni(OH2)][O3SCF3] was obtained from slow hydrolysis of (POCOP)Ni(OSO2CF3). All new complexes have been characterized spectroscopically and by X-ray crystallography. IR and solid state structural data indicate that Ni-L/X interactions are dominated by ligand-to-metal σ-donation; presence of little or no π-backbonding is consistent with the electrophilicity of the cationic fragment [(POCOP)Ni]+. 相似文献
16.
West Douglas X. Salberg Michelle M. Bain Gordon A. Liberta Anthony E. 《Transition Metal Chemistry》1997,22(2):180-184
Binuclear nickel(II) and copper(II) complexes with four 5-methoxysalicylaldehyde N(3)-substituted thiosemicarbazones and nickel(II) complexes of four 5-nitro-salicylaldehyde N(3)-substituted thiosemicarbazones have been prepared and characterized. I.r., electronic, and e.s.r. spectra of the complexes, as well as i.r., electronic, and 1H- and 13C-n.m.r spectra of the thiosemicarbazones, have been obtained. None of these compounds show significant growth inhibitory activity against the fungi Aspergillus niger and Paecilomyces variotii. 相似文献
17.
Summary The following ethylenediamine(sulphamide)nickel(II) and ethylenediamine(sulphamide)copper(II) complexes were prepared: Ni(en)3(H2Su)Cl2, in which H2Su is not coordinated; Ni(en)2(H2Su)Cl2 , Ni(en)2(HSu)Cl · EtOH, Ni(en)2(HSu)2,Ni(en)2(HSu)2(H2Su)2 · EtOH, Cu(en)2(HSu)2(H2Su) · O.5EtOH, in which the sulphamide molecule, H2Su, or the sulphamidato anion [HSu] are totally or partially coordinated. The comparison of the i.r. spectra of these complexes with those of H2 Su and NaHSu and with those of the M(en)2Cl2 complexes permits the isolation of the sulphamide or sulphamidato (SO2) and (SN2) bands which show oxygen-coordination of these ligands to the metal. Some (MO) bands were identified in the far i.r. region. 相似文献
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A. M. Akimbaeva 《Russian Journal of Applied Chemistry》2006,79(4):559-562
The sorption properties of anion exchangers based on modified shungites with respect to palladium(II) ions from chloride solutions were studied. The effect of sorbent nature, pH of a solution, and process duration on the degree of their recovery was considered. 相似文献
20.
Summary We have synthesized and characterized halocuprate(II) complexes with isoxazolium and imidazolium derivatives. The compounds are of three types: a) Cu(LH)X3 · n H2O where L=isoxazole (isox), 3,5-diMeisox, or 5-amino-3,4-diMeisox (5-ADI); X=Cl or Br; n=1–2; b) (LH)2CuCl4 where L=5-ADI, N-ethylimidazole (N-EtIm) or N-PropIm; c) (3-AMIH)2Cu2X6 where 3-AMI=3-amino-5-methylisox; X= Cl or Br.Complexes (a) seem to be zwitterions with an oxygenbonded ligand and approximately tetrahedral structure; compounds (b) are distorted tetrahedral, nearly square planar; derivatives (c) are polymeric or dimeric with near square planar geometry. 相似文献