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1.  Tris(1,2-dimeth­oxy­ethane-κ2 O,O′)iodidocalcium iodide 
In the title complex, [CaI(C4H10O2)3]I, the CaII atom is seven-coordinated by six O atoms from three 1,2-dimeth­oxy­ethane (DME) ligands and one iodide anion in a distorted penta­gonal–bipyramidal geometry. The I atom and one of the O atoms from a DME ligand lie in the axial positions while the other O atoms lie in the basal plane. The other iodide anion is outside the complex cation.
PMCID: PMC3274900  PMID: 22346847
2.  Aqua­(dicyanamido)­{μ-6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­i­dyne)]diphenolato}copper(II)sodium(I) 
The mol­ecule of the title compound, [CuNa(C18H18N2O4)(C2N3)(H2O)], is almost planar, the maximum deviation from the mol­ecular plane being 0.48 (4) Å. The coordination environment of the Cu2+ ion is distorted square-planar and it is N 2 O 2-chelated by the Schiff base ligand. The Na+ cation has a distorted octahedral environment defined by the four O atoms of the 6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate ligand, a water ligand and a dicyanamide anion.
PMCID: PMC2969014  PMID: 21582402
3.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-1κ4 O 6,O 1,O 1′,O 6′:2κ4 O 1,N,N′,O 1′}(methanol-1κO)(perchlorato-1κO)copper(II)sodium(I) 
The mol­ecule of the title compound, [CuNa(C18H18N2O4)(ClO4)(CH3OH)], is almost planar with mean deviation of 5.2 (8)°. The coordination environment of the CuII ion is distorted square-planar and it is N2O2-chelated by the 6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate Schiff base ligand. The Na atom is chelated by the four O atoms of the Schiff base ligand, and coordinated by a methanol mol­ecule and a perchlorate anion. The six-coordinate Na atom adopts a distorted octa­hedral coordination geometry. The O atoms of the perchlorate anion are disordered over two sites with site-occupancy factors of 0.697 (5) and 0.303 (5). O—H⋯O hydrogen bonding occurs.
PMCID: PMC2969023  PMID: 21582382
4.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diyl­bis(nitrilo­methyl­idyne)]diphenolato-1κ4 O 6,O 1,O 1′,O 6′:2κ4 O 1,N,N′,O 1′}(methanol-1κO)(perchlorato-1κO)nickel(II)sodium 
The mol­ecule of the title compound, [NaNi(C18H18N2O4)(ClO4)(CH3OH)], is almost planar, the maximum deviation from the molecular plane being 5.3 (1) Å. The Ni2+ ion is N2O2 coordinated by the Schiff base ligand, leading to a slightly distorted square-planar environment. The Na atom is chelated by the four O atoms of the Schiff base ligand and is coordinated by the O atoms of a methanol ligand and a perchlorate anion. The perchlorate ion is disordered over two sites with occupancies 0.723 (12):0.277 (12).
PMCID: PMC2968922  PMID: 21582346
5.  Aqua­(dicyanamido){μ-6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}nickel(II)sodium 
The mol­ecule of the title compound, [NaNi(C18H18N2O4)(C2N3)(H2O)], is approximately planar, with a maximum deviation from the mol­ecular plane of 0.770 (5) Å. The coordination environment of the Ni2+ ion is distorted square-planar and it is N2O2 coordinated by the 6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate Schiff base ligand. The Na+ atom is chelated by the four O atoms of the Schiff base ligand, a water ligand and a dicyanamide anion. The structure displays inter­molecular O—H⋯N hydrogen bonding.
PMCID: PMC2977604  PMID: 21583790
6.  Aqua­{6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}nickel(II) 
The title complex, [Ni(C18H18N2O4)(H2O)], lies on a mirror plane with the NiII ion coordinated by two N and two O atoms of a tetra­dentate Schiff base ligand and one water O atom in a distorted square-pyramidal enviroment. The –CH2–CH2– group of the ligand is disordered equally over two sites about the mirror plane. The dihedral angle between the mean planes of the two symmetry-related chelate rings is 37.16 (6)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link complex mol­ecules into one-dimensional chains along [100] and these chains are linked, in turn, by very weak inter­molecular C—H⋯O hydrogen bonds into a two-dimensional network.
PMCID: PMC2970327  PMID: 21577698
7.  {6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-1κ4 O 1,O 1′,O 6,O 6′:2κ4 O 1,N,N′,O 1′}(ethanol-1κO)-μ-nitrato-1:2κ2 O:O′-dinitrato-1κ4 O,O′-samarium(III)zinc(II) 
In the title heteronuclear ZnII–SmIII complex, [SmZn(C18H18N2O4)(NO3)3(CH3CH2OH)], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-methoxy­salicyl­idene)ethyl­enediamine (H2 L), the SmIII and ZnII ions are triply bridged by two phenolate O atoms from the Schiff base ligand and one nitrate anion. The five-coordinate ZnII ion is in a square-pyramidal geometry formed by the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The SmIII center is in a ten-fold coordination of O atoms, involving the phenolate O atoms, two meth­oxy O atoms, one ethanol O atom, and two O atoms from two nitrate anions and one from the bridging nitrate anion. In the crystal, inter­molecular O—H⋯O and C—H⋯O inter­actions generate a layer structure extending parallel to (101).
PMCID: PMC2970192  PMID: 21577700
8.  Aqua­{4,4′-dibromo-6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}copper(II) 
The title complex, [Cu(C18H16Br2N2O4)(H2O)], lies on a crystallographic mirror plane with the CuII ion coordinated by two N atoms and two O atoms of a tetra­dentate Schiff base ligand and one O atom from a water ligand in a slightly distorted square-pyramidal environment. The mirror plane, which coincides with the Cu—Owater bond, imposes disorder of the atoms of the ethyl­ene group. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link complex mol­ecules into extended chains along [100].
PMCID: PMC2972126  PMID: 21578609
9.  Chlorido{N-[(diethyl­amino)­dimethyl­sil­yl]anilido-κN}(N,N,N′,N′-tetra­methyl­ethane-1,2-diamine-κ2 N,N′)cobalt(II) 
In the title cobalt(II) compound, [Co(C12H21N2Si)Cl(C6H16N2)], the ethane-1,2-diamine donor mol­ecule coordin­ates the metal atom in an N,N′-chelating mode, with Co—N distances of 2.136 (2) and 2.140 (3) Å. An anilide ligand connects to the CoII atom with a σ–bond, the Co—Nanilide distance being 1.931 (2) Å. The four-coordinate CoII atom demonstrates a slightly distorted tetra­hedral geometry.
PMCID: PMC3051766  PMID: 21522921
10.  Aqua­{6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}methano­lmanganese(III)) perchlorate hemihydrate 
The asymmetric unit of the title compound, [Mn(C18H18N2O4)(CH3OH)(H2O)]ClO4·0.5H2O, contains two complex cations and two perchlorate anions, one of which is disordered over two positions in a 0.767 (8):0.233 (8) ratio. The MnIII atoms are in distorted octa­hedral environments. In addition to the equatorial tetra­dentate salicylaldimine ligand, each Mn is axially coordinated by both a methanol and a water mol­ecule. The complex is a dimer held together by multiple strong and weak hydrogen-bonding inter­actions between the coordinated water mol­ecule on one monomer with all the phenolic and meth­oxy O atoms on the other monomer. In addition, the two perchlorate anions are linked by hydrogen bonds to the two methanol mol­ecules coordinated to each Mn center. The Mn—O phenolic bond distances range from 1.868 (2) to 1.882 (2) Å while the Mn—N distances range from 1.978 (2) to 1.981 (2) Å. Mn—O distances for the axial water and methanol ligands are longer at 2.226 (2)/2.257 (2) and 2.313 (2)/2.324 (2) Å, reflecting the usual Jahn–Teller distortion as found in MnIII complexes.
PMCID: PMC3006775  PMID: 21587761
11.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diyl­bis(nitrilo­methanylyl­idene)]diphenolato-1κ4 O 6,O 1,O 1′,O 6′;2κ4 O 1,N,N′,O 1′}(methanol-1κO)(tetra­fluoridoborato-1κ2 F,F′)-2-copper(II)-1-sodium 
In the dinuclear salen-type title complex, [CuNa(BF4)(C18H18N2O4)(CH3OH)], the CuII atom is chelated by two O atoms and two N atoms of the deprotonated Schiff base in a square-planar geometry. The Na atom is seven-coordinate as it is linked to four O atoms of the same Schiff base ligand, one O atom of the methanol and two tetra­fluorido­borate F atoms. The remaining two F atoms of the anion are disordered over two sites in a 0.598 (18):0.402 (18) ratio.
PMCID: PMC3212189  PMID: 22090891
12.  Tetra­kis(μ-3,4-dimeth­oxy­phenyl­acetato)­bis­[(3,4-dimeth­oxy­phenyl­acetato)(1,10-phenanthroline)holmium(III)] 
In the centrosymmetric title compound, [Ho2(C10H11O4)6(C12H8N2)2], the HoIII atom is nine-coordinated by seven O atoms from the 3,4-dimeth­oxy­phenyl­acetate (L) anions and two N atoms from a 1,10-phenanthroline (phen) mol­ecule. The L ligands are coordinated to the HoIII ions in three modes: chelating, bridging and bridging–tridentate. Intra­molecular C—H⋯O inter­actions occur. The crystal packing is stabilized by inter­molecular C—H⋯O inter­actions and weak aromatic π–π inter­actions between phen mol­ecules and the aromatic rings of the L ligands [centroid–centroid distance = 3.821 (2) Å].
PMCID: PMC2983278  PMID: 21587417
13.  Trichlorido{μ-6,6′-dimeth­oxy-2,2′-[cyclo­hexane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolato}dimethano­l­copper(II)samarium(III) 
In the title hetero-dinuclear complex, [CuSm(C22H24N2O4)Cl3(CH3OH)2], the CuII cation is N,N′,O,O′-chelated by a 6,6′-dimeth­oxy-2,2′-[cyclo­hexane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolate ligand, and one Cl− anion further coordinates to the CuII cation to complete the distorted square-pyramidal coordination geometry, while the SmIII cation is chelated by four O atoms from the same ligand, and is further coordinated by two methanol mol­ecules and two Cl− anions in an bicapped trigonal–prismatic geometry. Intra- and inter­molecular O—H⋯Cl hydrogen bonds are present in the structure.
PMCID: PMC3344333  PMID: 22590099
14.  Tetra­kis[μ-2-(3,4-dimeth­oxy­phen­yl)acetato]-κ4 O:O′;κ3 O,O′:O;κ3 O:O,O′-bis­{[2-(3,4-dimeth­oxy­phen­yl)acetato-κ2 O,O′](1,10-phenanthroline-κ2 N,N′)samarium(III)} 
In the centrosymmetric dinuclear title complex, [Sm2(C10H11O4)6(C12H8N2)2], the SmIII ion is nine-coordinated by seven O atoms of five 2-(3,4-dimeth­oxy­phen­yl)acetate (DMPA) ligands and two N atoms of one bis-chelating 1,10-phenanthroline (phen) ligand, forming a distorted tricapped trigonal-prismatic environment. The DMPA ligands coordinate in bis-chelate, bridging and bridging tridentate modes. An intra­molecular C—H⋯O hydrogen bond occurs. Inter­molecular C—H⋯O inter­actions are also present in the crystal.
PMCID: PMC3009179  PMID: 21588817
15.  Tetra­kis[μ-2-(3,4-dimeth­oxy­phen­yl)acetato]-κ3 O 1,O 1′:O 1;κ3 O 1:O 1,O 1′;κ4 O 1:O 1′-bis­{[2-(3,4-dimeth­oxy­phen­yl)acetato-κ2 O 1,O 1′](1,10-phenanthroline-κ2 N,N′)erbium(III)} 
In the dimeric centrosymmetric title complex, [Er2(C10H11O4)6(C12H8N2)2], the ErIII ion is nine-coordinated by five 2-(3,4-dimeth­oxy­lphen­yl)acetic acid (DMPA) ligands via seven O atoms and two N atoms from a bis-chelating 1,10-phenanthroline (phen) ligand in a distorted tricapped trigonal-prismatic geometry. The DMPA ligands are coordinated to the ErIII ion in bis-chelate, bridging and bridging tridentate modes. Relatively weak intra­molecular C—H⋯O inter­actions reinforce the stability of the mol­ecular structure. Inter­molecular C—H⋯O inter­actions are also observed.
PMCID: PMC3009341  PMID: 21588841
16.  Aqua­{6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-κ4 O,N,N′,O′}(formato-κO)manganese(III) dihydrate 
The MnIII atom in the title complex, [Mn(C18H18N2O4)(CHO2)(H2O)]·2H2O, is O,N,N′,O′-chelated by the deproton­ated Schiff base; the four chelating atoms form an approximate square, with the O atoms of the water mol­ecule and the formate ion in axial positions above and below the square plane. Two metal-bearing mol­ecules are linked by an O—Hwater⋯O hydrogen bond about a center of inversion, generating a hydrogen-bonded dinuclear species; adjacent dinuclear units are linked through the lattice water mol­ecules, forming a three-dimensional network.
PMCID: PMC3120422  PMID: 21754637
17.  Diaqua­{6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-κ2 O,N,N′,O′}manganese(III) perchlorate 18-crown-6 hemisolvate monohydrate 
In the cation of the title compound, [Mn(C18H18N2O4)(H2O)2]ClO4·0.5C12H24O6·H2O, the MnIII ion is coordinated by two water O atoms, and two O atoms and two N atoms from the tetradentate 6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]di­phenolate ligand, completing a distorted octa­hedral geometry. One O atom of the 18-crown-6-ether is disordered over two positions with occupancies of 0.70 (2) and 0.30 (2).
PMCID: PMC2968196  PMID: 21581765
18.  {4,4′-Dimeth­oxy-2,2′-[1,1′-(ethane-1,2-diyldinitrilo)diethyl­idyne]diphenolato}nickel(II) hemihydrate 
In the title complex, [Ni(C20H22N2O4)]·0.5H2O, the NiII ion is in a slightly distorted square-planar geometry involving an N2O2 atom set of the tetra­dentate Schiff base ligand. The asymmetric unit contains one mol­ecule of the complex and half a water solvent mol­ecule. The solvent water mol­ecule lies on a crystallographic twofold rotation axis. An inter­molecular O—H⋯O hydrogen bond forms an R 2 1(4) ring motif involving a bifurcated hydrogen bond to the phenolate O atoms of the complex. In the crystal structure, mol­ecules are linked by π–π stacking inter­actions, with centroid–centroid distances in the range 3.5310 (11)–3.7905 (12) Å, forming extended chains along the b axis. In addition, there are Ni⋯Ni and Ni⋯N inter­actions [3.4404 (4)–4.1588 (4) and 3.383 (2)–3.756 (2) Å, respectively] which are shorter than the sum of the van der Waals radii of the relevant atoms. Further stabilization of the crystal structure is attained by weak inter­molecular C—H⋯O and C—H⋯π inter­actions.
PMCID: PMC2961936  PMID: 21203060
19.  Chlorido{N-[(diethyl­amino)­dimethyl­sil­yl]anilido-κN}(N,N,N′,N′-tetra­methyl­ethane-1,2-diamine-κ2 N,N′)iron(II) 
In the title iron(II) complex, [Fe(C12H21N2Si)Cl(C6H16N2)], the FeII cation is coordinated by two N atoms from the tetramethylethane-1,2-diamine ligand [Fe—N = 2.191 (5) and 2.215 (4) Å], one N atom from the N-[(diethyl­amino)­dimethyl­sil­yl]anilide ligand [Fe—N = 1.943 (4) Å] and a chloride ligand [Fe—Cl = 2.2798 (16) Å] in a distorted tetra­hedral geometry. The N—Si—N angle is 113.9 (3)°. The crystal packing exhibits no short inter­molecular contacts.
PMCID: PMC3588711  PMID: 23468676
20.  Tetra­kis(1,2-dimethoxy­ethane-κ2 O,O′)ytterbium(II) bis­(μ2-phenyl­selenolato-κ2 Se:Se)bis­[bis­(phenyl­selenolato-κSe)mercurate(II)] 
The title salt, [Yb(C4H10O2)4][Hg2(C6H5Se)6], consists of eight-coordinate homoleptic [Yb(DME)4]2+ dications (DME is 1,2-dimethoxy­ethane) countered with [Hg2(SePh)6]2− di­anions. The cations and anions have twofold rotation and inversion symmetry, respectively. The Yb centre displays a square-anti­prismatic coordination geometry and the Hg centre has a distorted tetra­hedral coordination environment. One phenyl­selenolate anion and one methyl group of a DME ligand are disordered over two positions with equal occupancies. This structure is unique in that it represents a less common mol­ecular lanthanide species in which the lanthanide ion is not directly bonded to an anionic ligand. There are no occurrences of the [Hg2(SePh)6]2− dianion in the Cambridge Structural Database (Version of November 2007), but there are similar oligomeric and polymeric Hgx(SePh)y species. The crystal structure is characterized by alternating layers of cations and anions stacked along the c axis.
PMCID: PMC2961915  PMID: 21203084
21.  Dichlorido{μ-6,6′-dimeth­oxy-2,2′-[o-phenyl­enebis(nitrilo­methyl­idyne)]diphenolato}(dimethyl sulfoxide)lead(II)zinc(II) N,N-dimethyl­formamide solvate 
In the heterodinuclear complex of the title compound, [PbZn(C22H18N2O4)Cl2(C2H6OS)]·C3H7NO, the ZnII atom is coordinated in a distorted square-pyramidal geometry by two N atoms and two O atoms from the diphenolate ligand, and one Cl atom which occupies the apical position. The PbII atom is coordinated in a distorted octa­hedral geometry by the four O atoms of the diphenolate ligand, one O atom from the dimethyl sulfoxide mol­ecule and one Cl atom. The dimethyl sulfoxide mol­ecule is disordered over two positions, with site occupancies of 0.576 (2) and 0.424 (2).
PMCID: PMC2959625  PMID: 21580898
22.  catena-Poly[[[{5,5′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}manganese(III)]-μ-acetato] methanol monosolvate] 
The title MnIII compound, {[Mn(C18H18N2O4)(CH3COO)]·CH3OH}n, was synthesized by a reaction between mangan­ese(II) acetate and ethyl­enebis(4-meth­oxy­salicylaldimine). The structure is made up of bis­(4-meth­oxy­salicyldene)ethyl­enediaminatomanganese(III) units bridged by acetate groups, with Mn—N = 1.9786 (9), Mn—O = 1.8784 (10) and Mn—Oacetate = 2.056 (9) and 2.2571 (9) Å, forming a one dimensional polymer (–Mn–acetate–Mn–acetate–) along [100]. The MnIII atom is in a Jahn–Teller-distorted octa­hedral environment with cis angles ranging from 81.87 (4) to 96.53 (4)° and trans angles ranging from 166.11 (3) to 173.93 (3)°. The methanol solvent mol­ecule is hydrogen bonded to the phenolate O atom. In addition to this classical hydrogen bond, there are weak C—H⋯O inter­actions. The structure was determined from a crystal twinned by pseudo-merohedry.
PMCID: PMC3008984  PMID: 21588822
23.  Aqua­{4,4′-dimeth­oxy-2,2′-[pyridine-2,3-diylbis(nitrilo­methanylyl­idene)]­diphenolato}copper(II) 
Mol­ecules of the title compound, [Cu(C21H17N3O4)(H2O)], lie across a crystallographic mirror plane. The CuII atom is five-coordinated in a distorted square-pyramidal environment by two phenolate O atoms and two imine N atoms of the tetra­dentate Schiff base anion in the basal plane and one water mol­ecule in the apical position. Because of symmetry, the pyridine N atom and the corresponding C atom at the 4-position of the pyridine ring are disordered. The crystal packing can be described as being composed of alternating layers stacked along [001]. Intra­molecular C—H⋯N and inter­molecular C—H⋯O and O—H⋯O hydrogen-bonding inter­actions, as well as C—H⋯π and π–π stacking inter­actions [shortest centroid–centroid distance = 3.799 (8) Å and inter­planar distance = 3.469 (2) Å] are observed.
PMCID: PMC3414130  PMID: 22904737
24.  Di-μ-hydroxido-bis­[hemiaqua­(N,N,N′,N′-tetra­methyl­ethane-1,2-diamine)­copper(II)] bis­(tetra­fluoridoborate) 
The title compound, [Cu2(OH)2(C6H16N2)2(H2O)](BF4)2, consists of dinuclear centrosymmetric [Cu2(OH)2(tmen)2(H2O)]2+ complex cations (tmen = N,N,N′,N′-tetra­methyl­ethane-1,2-diamine) and tetra­fluoridoborate anions. In the cation, the CuII atom shows a slightly distorted square-pyramidal coordination geometry provided by a pair of μ-OH− anions and by the N atoms of a chelate tmen ligand in the basal plane. The apical position is statistically occupied by the O atom of a half-occupancy water mol­ecule. The F atoms of the anion are disordered over three sets of sites with occupancies of 0.598 (9):0.269 (6):0.134 (8). The crystal packing is governed by ionic forces as well as by O—H⋯F hydrogen bonds.
PMCID: PMC3379114  PMID: 22719335
25.  Acetato(aqua){6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolato}cobalt(III) methanol disolvate 
In the title complex, [Co(C18H18N2O4)(C2H3O2)(H2O)]·2CH3OH, the CoIII atom is hexa­coordinated by water and acetate groups in the axial positions and by the tetra­dentate Schiff base occupying equatorial positions. These axial bonds are longer than the equatorial bonds to the tetra­dentate Schiff base. Two mol­ecules form a dimer through strong hydrogen bonds from the coordinated water of one mol­ecule to the meth­oxy O atoms of an adjoining mol­ecule. There is extensive intra- and inter­molecular O—H⋯O hydrogen bonding between the coordinated water and acetate ligands and the methanol solvent mol­ecules. In addition, there are weak inter­molecular C—H⋯O inter­actions, which link the mol­ecules into a three-dimensional array.
PMCID: PMC3393214  PMID: 22807782

Results 1-25 (131557)