Polyhedron Journal Impact Factor & Information

Publisher: Elsevier

Journal description

Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in the major areas of inorganic and organometallic chemistry. Subjects covered include: synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis of organic compounds. In addition Polyhedron publishes specially commissioned review articles (Polyhedron Reports) and collections of original research papers Polyhedron Symposia-in-Print) of appropriate timeliness.Papers concerned solely with stability constants determined by potentiometric titration data unsupported by other e.g. spectroscopic techniques will not be acceptable nor will solvent extraction data unless supported by other data of interest to inorganic chemists.

Current impact factor: 2.01

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 2.011
2013 Impact Factor 2.047
2012 Impact Factor 1.813
2011 Impact Factor 2.057
2010 Impact Factor 2.033
2009 Impact Factor 2.207
2008 Impact Factor 1.801
2007 Impact Factor 1.756
2006 Impact Factor 1.843
2005 Impact Factor 1.957
2004 Impact Factor 1.586
2003 Impact Factor 1.584
2002 Impact Factor 1.414
2001 Impact Factor 1.2
2000 Impact Factor 1.036
1999 Impact Factor 1.116
1998 Impact Factor 1.335
1997 Impact Factor 1.235
1996 Impact Factor 1.324
1995 Impact Factor 1.013
1994 Impact Factor 1.081
1993 Impact Factor 1.226
1992 Impact Factor 1.287

Impact factor over time

Impact factor

Additional details

5-year impact 1.95
Cited half-life 7.50
Immediacy index 0.53
Eigenfactor 0.02
Article influence 0.33
Website Polyhedron website
Other titles Polyhedron
ISSN 0277-5387
OCLC 7590197
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details


  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors pre-print on any website, including arXiv and RePEC
    • Author's post-print on author's personal website immediately
    • Author's post-print on open access repository after an embargo period of between 12 months and 48 months
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months
    • Author's post-print may be used to update arXiv and RepEC
    • Publisher's version/PDF cannot be used
    • Must link to publisher version with DOI
    • Author's post-print must be released with a Creative Commons Attribution Non-Commercial No Derivatives License
    • Publisher last reviewed on 03/06/2015
  • Classification

Publications in this journal

  • Polyhedron 01/2016; 104:1-8. DOI:10.1016/j.poly.2015.11.020
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    ABSTRACT: Three neodymium (Nd) coordination polymers with propionate, succinate and mixed succinate-oxalate ligands have been synthesized and structurally characterized. Nd2(C3H5O2)6(H2O)3·3H2O (1) has a 1D polymeric structure built with both ninefold and ten-fold coordinated neodymium polyhedra linked through μ2-bridging propionate ligands. Nd2(C4H4O4)3(H2O)2 (2) has a 3D polymeric structure constructed with two distinct ninefold coordinated neodymium polyhedra linked through three types of succinate ligands, two in μ4- and one in μ3-coordination modes. Nd2(C4H4O4)2(C2O4)(H2O)4·3H2O (3) is built with two types of ten-fold coordinated neodymium polyhedra linked through μ4-succinate ligands into 2D undulating layers which are further connected through μ2-oxalate ligands forming a 3D network with channels. Their vibrational modes and thermal stabilities have been further investigated. Crown
    Polyhedron 12/2015; 102:130-136. DOI:10.1016/j.poly.2015.07.065
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    ABSTRACT: Examples of coordination entities bearing (E)-N,N′-bis(heteroaryl)iminoisoindolines are scarce in the literature. This scarcity has prompted us to investigate the coordination chemistry of (E)-N,N′-bis(2-pyridyl)iminoisoindoline (2-pyimiso), a polydentate ligand exhibiting three potentially coordinating nitrogen atoms. In this paper we report the synthesis, spectroscopic characterization and DFT calculations of trans-[PtCl2(dmso-κS)(2-pyimiso-κN)] (trans-1), which contains 2-pyimiso as a monodentate ligand. DFT calculations in the gas phase, using either B3LYP, M06 or PBE0 hybrid functionals along with the LACV3P∗∗ and LACV3P∗∗++ basis sets, have revealed that in trans-1, 2-pyimiso coordinates to Pt(II) through the 2-pyridyl group attached to the imine nitrogen atom. Solvation free energies of both cis- and trans-1 in acetonitrile were computed at the M06/LACV3P∗∗ level of calculation using the Poisson-Boltzmann solvation model. The ΔG298 value calculated for the cis-trans equilibrium of 1 in acetonitrile is -5.5 kcal mol-1, which agrees with our 1H NMR data in acetonitrile-d3.
    Polyhedron 12/2015; 102:329-336. DOI:10.1016/j.poly.2015.09.064
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    ABSTRACT: Ferrocenyl betadiketones were reacted with hydrated lanthanide trihalides in presence of a base to yield red color solids, whose structures were characterized by single crystal X-ray diffraction technique. Structural analysis revealed the formation of nona- and tetranuclear lanthanide oxo-hydroxo clusters [Dy9(μ4-O)2(μ3-OH)8(μ-Fca)8(Fca)8]-[HN(C2H5)3]+ (1), [Ln4(μ-OH)2(μ-OCH3)4(CH3OH)2(Fctfa)6] Ln = Yb (2), Lu (3), and [Ln4(μ-OH)2(μ-OCH3)4(CH3OH)2(Fcpfa)6] Ln = Yb (4), Lu (5). Magnetism studies revealed that 1 shows slow relaxation of magnetisation. Cyclic voltammetry studies of 1 reveal electrochemically stable quasi reversible oxidation systems whereas 2-5 showed irreversible nature.
    Polyhedron 12/2015; 102:361-365. DOI:10.1016/j.poly.2015.10.017
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    ABSTRACT: The syntheses, spectral, structural and catalytic properties of some new cobalt(III) complexes, [Co(mpcdt)3] (1), [Co(ppcdt)3] (2) and [Co(mppcdt)3]·0.25CHCl3 (3), derived from 4-methyl piperazine-1-carbodithioate (mpcdt), 4-phenyl piperazine-1-carbodithioate (ppcdt) and 4-(2-methoxyphenyl) piperazine-1-carbodithioate (mppcdt) have been described. A series of β-enaminoesters and β-enaminones were obtained in about 90% yield by the reactions of β-ketoesters and 1,3-diketones with aliphatic and aromatic amines using 1-2 mol% of the above cobalt(III) complexes as catalysts and these have been characterized by NMR, GC-MS and X-ray crystallography. Complexes 1, 2 and 3 are stabilized by intermolecular C-H⋯S interactions, leading to the formation of supramolecular architectures. Thermogravimetric analysis of complexes 1 and 2 have been investigated by TG-DTA, which indicate that cobalt sulfide is formed as the final product.
    Polyhedron 12/2015; 102:375-385. DOI:10.1016/j.poly.2015.10.007
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    ABSTRACT: Graphical abstract Two types of lanthanide salen complexes have been obtain. The general formulae of the complexes are [Ln(H2L)3(NO3)3] Ln = La, Eu, Tb - type I and [Ln(H2L)2(NO3)3EtOH]MeOH Ln = Er, Tm - type II, where H2L is N,N′-bis(5-methylsalicylidene)-4-methyl-1,3-phenylenediamine. The structural change is due to a decrease of the ionic radii of the lanthanide ions. A series of five Ln(III) salen type complexes, with La(III), Eu(III), Tb(III), Er(III) and Tm(III) cations, were obtained by a template reaction between 5-methylsalicylaldehyde and 4-methyl-1,3-phenylenediamine in the presence of the appropriate Ln(III) nitrate. Two types of complexes of the general formulae [Ln(H2L)3(NO3)3] (type I) [Ln = La (1), Eu (2), Tb (3)] and [Ln(H2L)2(NO3)3EtOH]MeOH (type II) [Ln = Er (4), Tm (5)], where H2L is N,N′-bis(5-methylsalicylidene)-4-methyl-1,3-phenylenediamine, were characterized by elemental analysis, FT-IR, ESI-MS, TG-DTA analysis, UV-Vis luminescence and 1H and 13C NMR spectroscopy. Single-crystal X-ray diffraction revealed that the type I complexes crystallize in the monoclinic P21/n space group, while type II complexes crystallize in the monoclinic Cc space group. The central cations for both type of complexes are nine-coordinated, exclusively by oxygen atoms, and the coordination resembles a distorted tricapped trigonal prism. In the case of type 1 complexes, the central cations are coordinated with three nitrate groups and three H2L neutral molecules, while for type 2 complexes, one of the ligand molecule is replaced by an ethanol molecule. In the latter case, the methanol molecule plays an important role in the crystal packing, taking part in hydrogen bonding which connects the complex molecules into infinite chains. The structural change is due to a decrease of the ionic radii of the lanthanide ions.
    Polyhedron 12/2015; 102:224-232. DOI:10.1016/j.poly.2015.09.063
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    ABSTRACT: A pair of chiral Eu(III) complexes prepared from enantiopure bis(1H-pyridin-2-one)salen ligands show strong sensitized luminescence and high circular dichroism activity in the region of π-π∗ transitions.
    Polyhedron 12/2015; 102:293-296. DOI:10.1016/j.poly.2015.10.008
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    ABSTRACT: l-Serine derivatives were covalently immobilized onto three clays with different nature, morphology or crystallite size: K10, which is a chemically-treated montmorillonite; laponite, which is a synthetic clay; and halloysite, which is a natural clay. To achieve that goal, the l-serine derivatives were firstly silylated with the organosilane 3-(triethylsilyl)propyl isocyanate, characterized by mass spectrometry, Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) and then covalently grafted to the clays. The resulting materials were characterized by elemental analyses (N, C and Si), FTIR and 13C solid-state NMR which confirmed the successful grafting of l-serine derivatives to the clays with increasing loading in the following order: halloysite nanoscrolls < laponite < K10. Powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were also performed for all the materials, which showed that no significant structural changes occurred in K10 and halloysite upon functionalization, but in the case of Laponite disruption of the pristine particles organization occurred after functionalization. Furthermore, 29Si solid-state NMR data provided evidence for the predominance of the bidentate grafting mechanism of the l-serines onto the clays, involving the reaction between two ethoxy groups of the l-serine based organosilanes and the clay edge/surface silanol groups of laponite and K10. For halloysite, the results suggested that the grafting involved the inner surface Al-OH groups at the internal walls or the Si-OH groups at the edges or external surface defects. It was also found that the remaining ethoxy groups of the T2-grafted organosilanes in K10 were partially hydrolyzed, resulting in free silanol groups or in lateral condensation.
    Polyhedron 12/2015; 102:121-129. DOI:10.1016/j.poly.2015.08.008
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    ABSTRACT: Three novel binary copper(II) complexes 1 [Cu(L1)2], 2 [Cu(L2)2] and 3 [Cu(L3)2] where, L1 (1-((E)-(3,5-dimethylisoxazol-4-ylimino)methyl)naphthalen-2-ol, C16H14N2O2), L2 (2-((E)-(3,5-dimethylisoxazol-4-ylimino)methyl)-4-methoxyphenol, C13H14N2O3) and L3 (2-((E)-(3,5-dimethylisoxazol-4-ylimino)methyl)-4-bromophenol, C12H11BrN2O2) have been synthesized. All Cu(II) complexes have been characterized by elemental analysis, FT-IR, ESI mass, UV–Vis, ESR, TG-DTA, magnetic moments and single crystal X-ray diffraction studies. Based on spectral studies square planar geometry is assigned for all Cu(II) complexes. Ligand L1, [Cu(L1)2] and [Cu(L2)2] are crystallized and found to be triclinic, orthorhombic and monoclinic crystal systems respectively. The Schiff bases and their Cu(II) complexes have been screened for antibacterial activity and antifungal activity by paper disc method. It is observed that all Cu(II) complexes showed more activity than corresponding Schiff bases. DNA binding and cleavage studies of Cu(II) complexes have also been investigated. It is observed an intercalation mode of binding with CT-DNA and cleavage of supercoiled pBR322 DNA in the presence of H2O2 and UV light.
    Polyhedron 12/2015; 102:111-120. DOI:10.1016/j.poly.2015.07.052
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    ABSTRACT: Two new anilido-imine tetra-azane ligands, 1,2-[(2′-(ArNH)C6H4HC=N)]2C6H4 (Ar = 2,6-Me2C6H3 (L1H2) and 2,6-iPr2C6H3 (L2H2)), were synthesized by the condensation reaction of o-phenylenediamine with the corresponding 2-(arylamino)benzaldehyde, and their zirconium and hafnium complexes, L1MCl2 (M = Zr (1b), Hf (1c)) and L2MCl2 (M = Zr (2b), Hf (2c)), were synthesized in high yields (61-66%) by the reactions of L1Li2 and L2Li2 with MCl4 in toluene. Direct HCl-elimination reactions of L1H2 with MCl4 (M = Ti, Zr, Hf) in toluene at 140 °C under vacuum afforded the products L1HMCl3 [M = Ti (1a′), Zr (1b′), Hf (1c′)] with a partially deprotonated tridentate ligand in good to high yields (48-70%). All the new complexes were characterized by 1H and 13C NMR spectroscopy and the molecular structures of 1b and 2c were determined by single crystal X-ray diffraction analysis. The metal centers in both complexes are six-coordinated with a distorted octahedral geometry. Upon activation with MAO or AlR3/Ph3CB(C6F5)4, complexes 1b-1c and 2b-2c all exhibit moderate catalytic activity for ethylene polymerization and produce linear polyethylene with ultra-high molar masses (100-184 × 104 g/mol).
    Polyhedron 12/2015; 102:337-343. DOI:10.1016/j.poly.2015.10.018
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    ABSTRACT: Cisplatin, cis-dichlorodiammineplatinum(II) is one the most employed antineoplasic drugs, exhibiting activity for different types of tumors. Cisplatin resistance can be related to its reduced uptake or retention, causing the decrease of the platinum-DNA adduct. This is attributed to cisplatin binding to other cellular components, causing its deactivation or damage to its normal biochemical pathway. Several studies with a focus on elucidating cisplatin binding to compounds present in cells have been conducted. In the present study, the interaction of cisplatin with one potential O and N-donor ligand, guanidinoacetic acid, was investigated, an amino acid found at high concentrations in the kidney and liver, organs where the drug accumulates. In vitro GAA and cisplatin interaction was studied in aqueous medium at the same ionic strength (0.1 mol L-1 KCl) and temperature (36.5 °C) as fluids of the body. Potentiometric and NMR (1H and 195Pt) analyses have been done, with the determination of stability constants and theoretical calculations for the principal structures involved. Results showed that GAA may be one of the potential biomolecules of cisplatin since, under the conditions of temperature and ionic strength of the body at around pH 7, part of cisplatin interacted with GAA to form [Pt(NH3)2(HGAA)2]2+. Optimization of this species, [Pt(NH3)2(HGAA)2]2+ was carried out using the Gaussian 03 package with the B3LYP function in combination with LANL2DZ (6-311G(d,p)), yielding a planar sphere coordination around Pt(II) and also O-H intramolecular interactions in the complex. The results on speciation for cisplatin/GAA systems could be of great interest since GAA may be one of the potential binding species of cisplatin, especially in the study of 5:1 cisplatin/GAA ratio (found in rats, for example).
    Polyhedron 12/2015; 102:313-320. DOI:10.1016/j.poly.2015.09.061
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    ABSTRACT: Two novel oxomolybdenum(V)-trispyrazolylborate complexes [(TpMoO)(μ2-O)2(MoOTp)](Tp = tris(pyrazolyl)borate) (1) and [(Tp4IMoOCl)(μ-O)(MoOClTp4I)](Tp4I = tris(4-iodinpyrazolyl)borate) (2) were synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. Their catalytic performances in cyclohexane (Cy) oxidation were studied. It is found that the catalytic performances of molybdenum(V) complexes 1 and 2 were far more better than the molybdenum(VI) complexes with the similar structure. The influence of the amount of H2O2, HNO3 and the solvents on the Cy oxidation were investigated too.
    Polyhedron 12/2015; 102:386-393. DOI:10.1016/j.poly.2015.09.056
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    ABSTRACT: Molecular complex [Zn(AP)2I2] (1) and the isomorphous ones [Cd(AP)6][Cd(AP)X3]2 consisting of octahedral complex cations [Cd(AP)6]2+ and the respective complex anions [Cd(AP)X3]- (AP - antipyrine, 2,3-dimethyl-1-phenyl-3-pyrazolin-5-one; X = I (2) or Br(3)) were prepared and characterized by single crystal X-ray diffraction, IR vibrational spectroscopy, thermal analysis and DFT calculations. It was found that antipyrine molecules are coordinated by the metal atom, in both zinc-containing molecular complex (1) and in the cadmium-containing complex cations and anions (compounds (2) and (3)), via an oxygen atom of the ligand carbonyl group. The experimental results confirm the calculated ones. Both zinc (cadmium) iodides and their antipyrine complexes demonstrate cytotoxic activity in vitro at 10-5-10-3 mol/L, and are promising ones for further investigations of their anticancer activity both in vitro and in vivo.
    Polyhedron 12/2015; 102:152-162. DOI:10.1016/j.poly.2015.09.011
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    ABSTRACT: Syntheses and spectroscopic characterization data for two new hybrid chelating ligands, 4,6-bis[(diphenyl-N,N-diethylcarbamoylmethylphosphine oxide)methyl]dibenzothiophene (2) and 4,6-bis[(diphenyl-N,N-diethylcarbamoylmethylphosphine oxide)methyl]dibenzothiophene 5,5-dioxide (3), that contain two CMPO fragments grafted onto dibenzothiophene and dibenzothiophene sulfone platforms, respectively, are presented. Coordination chemistry with selected lanthanide nitrates is described along with a X-ray crystal structure determination for an unexpected Eu(III) complex, Eu(4)(NO3)3 that contains the intermediate ligand oxidation species 4,6-bis[(diphenyl-N,N-diethylcarbamoylmethylphosphine oxide)methyl]dibenzothiophene 5-oxide (4).
    Polyhedron 12/2015; 102:103-110. DOI:10.1016/j.poly.2015.07.066
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    ABSTRACT: A new trinuclear complex [(CuLα-Me)2Co(bnz)2] (1) has been synthesized by using a metalloligand [CuLα-Me] (H2Lα-Me = N,N′-bis(α-methylsalicylidene)-1,3-propanediamine, bnz = benzoate) with trans-coordinated syn-syn bridging benzoate group (1κO:2κO′). The syn-syn coordinative selectivity of carboxylate towards this trinuclear unit leads exclusively to the formation of linear coordination cluster. Such coordinative adaptability is exploited for supramolecular assembly using a dicarboxylate linker, terephthalate (tph, 1,4-benzenedicarboxylate) which yielded a tailored one-dimensional quasi-linear coordination polymer [(CuLα-Me)2Co(tph)]n·2nH2O (2) having the linear trinuclear node. Isothermal magnetization measurement at 2 K suggests that both 1 and 2 posses S = 1/2 ground spin state indicating the presence of antiferromagnetic coupling at low temperature. The variable-temperature magnetic susceptibility measurements also reveal that both compounds are antiferromagnetically coupled with exchange coupling constants (J) of -17.3 and -9.2 cm-1 for 1 and 2, respectively. The nature and magnitude of exchange interactions are further corroborated by density functional calculations.
    Polyhedron 12/2015; 102:366-374. DOI:10.1016/j.poly.2015.10.014

  • Polyhedron 12/2015; 102:615-626. DOI:10.1016/j.poly.2015.10.040
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    ABSTRACT: The spin Hamiltonian parameters (g factors and zero-field splittings (ZFSs)) and local structures of three Cr(CN)63- centres in NaCl are studied at three temperatures based on the perturbation calculations. The signs and magnitudes of the ZFSs D and E are in accordance with those of average bond length discrepancy ΔR¯(=(1/6)∑δRi,i=1-6) and rhombic distortion parameter H(=-(Δφ¯)1/2(ΔR¯)3/D), relevant to average planar bond angle discrepancy Δφ¯(=(1/4)∑δφi,i=1-4) related to an ideal octahedron. The SHPs exhibit the smallest rhombic (or orthorhombic) distortions and the weakest covalency at 4.2 K, and the largest rhombic distortions and strongest covalency at 77 K with comparable D and E. The magnitude of g-shifts (= gi - gs) obey the tendency 77 K < 290 K ≤ 4.2 K, in consistent with that of covalency factor N. The CT contributions to g-shifts are opposite in sign and about 51-63% in magnitude compared with the CF ones. The microscopic mechanisms of the local structures (i.e., the impurity displacements ΔRX and ΔRY and ligand displacements ΔRP, ΔRP′ and ΔRP″) are analyzed for the various centres in view of the electrostatic interactions arising from the cation vacancies. Unlike conventional rhombic centres I and II for all three temperatures, the new orthorhombic centre III occurs only at low temperatures (4.2 K and 77 K) and indeed exhibits new structural properties, especially the largest ΔR¯ and H as well as D and E.
    Polyhedron 12/2015; 102:253-260. DOI:10.1016/j.poly.2015.09.047