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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.
doi:10.1107/S160053681200075X
PMCID: PMC3274900  PMID: 22346847
2.  Crystal structure of {μ-6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolato}(meth­anol)(nitrato)nickel(II)sodium 
Two phenolate O atoms provided by a Schiff base ligand create a double bridge between Ni2+ and Na+ ions. The coordination environment of the Ni2+ ion is square-planar and it has an unusual seven-coordinated geometry: four atoms from the Schiff base ligand, two from a nitrate anion, which coordinates in a bidentate chelating mode, and one O atom from the coordinated methanol mol­ecule. C—H⋯O weak hydrogen-bond inter­actions result in the formation of chains along the b-axis direction which are further assembled by bifurcated O—H⋯O hydrogen bonds and π-stacking inter­actions.
In the molecular structure of the title compound, [NaNi(C18H18N2O4)(NO3)(CH3OH)], the Ni2+ ion has a slightly distorted square-planar coordination environment defined by two N and two O atoms which belong to a Schiff base ligand, viz. 6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolate. Seven O atoms form the coordination environment of the Na+ ion: four from the Schiff base ligand, two from a bidentate chelating nitrate anion and one O atom from a coordinating methanol mol­ecule. In the crystal, the bimetallic complexes are assembled into chains along the b-axis direction via weak C—H⋯O hydrogen-bond inter­actions. Neighbouring chains are in turn connected through bifurcated O—H⋯O hydrogen bonds that involve the coordinating methanol mol­ecules and the nitrate anions, and through π–π stacking inter­actions between phenyl rings of neighbouring mol­ecules.
doi:10.1107/S160053681402159X
PMCID: PMC4257329  PMID: 25484729
crystal structure; hydrogen bonds; π–π stacking; NiII–Na heterometallic complex; Schiff base
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.
doi:10.1107/S1600536809010356
PMCID: PMC2969023  PMID: 21582382
4.  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.
doi:10.1107/S1600536809011064
PMCID: PMC2969014  PMID: 21582402
5.  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.
doi:10.1107/S1600536812014523
PMCID: PMC3344333  PMID: 22590099
6.  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.
doi:10.1107/S160053680901438X
PMCID: PMC2977604  PMID: 21583790
7.  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].
doi:10.1107/S1600536810036408
PMCID: PMC2983278  PMID: 21587417
8.  {μ-6,6′-Dimeth­oxy-2,2′-[cyclo­hexane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}methanol-μ-nitrato-dinitratocopper(II)europium(III) 
In the title dinuclear salen-type complex, [CuEu(C22H24N2O4)(NO3)3(CH3OH)], the CuII ion is five-coordinated to two imine N atoms and two phenolate O atoms and one O from the bridging nitrate group. The EuIII ion is ligated to three nitrate groups, four O atoms from the salen-type ligand and one methanol mol­ecule, leading to a distorted tenfold coordination for the rare earth cation. One of the three nitrate anions is disordered over two positions in a 0.66 (5):0.34 (5) ratio.
doi:10.1107/S1600536810039103
PMCID: PMC3008985  PMID: 21588818
9.  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.
doi:10.1107/S1600536809034278
PMCID: PMC2970327  PMID: 21577698
10.  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).
doi:10.1107/S1600536808034338
PMCID: PMC2959625  PMID: 21580898
11.  Bis{μ-4,4′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}bis­({4,4′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenol}manganese(III)) bis­(hexa­fluorido­phosphate) 
In the title complex, [Mn2(C19H20N2O4)2(C19H22N2O4)2](PF6)2, the MnIII ion is coordinated by two O [Mn—O = 1.855 (2) and 1.887 (2) Å] and two N [Mn—N = 1.982 (3) and 1.977 (3) Å] atoms from the tetra­dentate Schiff base ligand and a coordinated axial ligand [Mn—O = 2.129 (2) Å]. The centrosymmetric dimer contains two Jahn–Teller-distorted MnIII ions, each in a nearly octa­hedral geometry, connected through two phenolate bridges from two ligands. There are two stereogenic centers. The methyl group and the H atom attached to the middle propane C atom are disordered over two positions with occupancy factors in the ratio 0.58:0.42. The crystal is therefore a mixture of two diasteroisomers, viz. RS/SR and RR/SS. In the axial ligand, the two benzene rings form a dihedral angle of 56.97 (5)° and the dihedral angle between the two MnNC3O chelate rings is 2.98 (12)°
doi:10.1107/S1600536809028591
PMCID: PMC2977226  PMID: 21583304
12.  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.
doi:10.1107/S1600536810040298
PMCID: PMC3009341  PMID: 21588841
13.  {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).
doi:10.1107/S1600536809007776
PMCID: PMC2968922  PMID: 21582346
14.  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.
doi:10.1107/S1600536812031273
PMCID: PMC3414130  PMID: 22904737
15.  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.
doi:10.1107/S1600536811002959
PMCID: PMC3051766  PMID: 21522921
16.  Tetra­ethyl­ammonium hexa­cyanidoferrate(III) bis­(diaqua­{6,6′-dimeth­oxy-2,2′-[o-phenyl­enebis(nitrilo­methyl­idyne)]diphenolato}manganese(III))–methanol–ethanol (1/2/2) 
In the title compound, (C8H20N)[Mn(C22H18N2O4)(H2O)2][Fe(CN)6]·2CH3OH·2C2H5OH or [NEt4][Mn(3-Meosalophen)(H2O)2]2[Fe(CN)6]·2CH3OH·2C2H5OH, the asymmetric unit consists of one half of an [NEt4]+ cation disordered around a twofold axis, the [Mn(3-Meosalophen)(H2O)2]+ coordination cation, one half of a C 2 symmetric [Fe(CN)6]3− anion and disordered methanol and ethanol solvent mol­ecules that are equally populated at two different sites. The MnIII atom chelated by the 3-Meosalophen ligand adopts a slightly distorted MnN2O4 octa­hedral geometry with the coordination completed by two water mol­ecules. The [Mn(3-Meosalophen)(H2O)2]+ cations, [Fe(CN)6]3- anions and solvent mol­ecules are connected into a zigzag chain through hydrogen-bonding inter­actions.
doi:10.1107/S1600536809037490
PMCID: PMC2971224  PMID: 21578133
17.  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].
doi:10.1107/S1600536809046212
PMCID: PMC2972126  PMID: 21578609
18.  {6,6′-Dimeth­oxy-2,2′-[naphthalene-2,3-diylbis(nitrilo­methyl­idyne)]diphenolato}thio­cyanato­cobalt(III) diethyl ether dichloro­methane solvate 
In the title complex, [Co(C26H20N2O4)(NCS)]·C4H10O·CH2Cl2, the penta­coordinated CoIII atom exhibits a distorted square-pyramidal geometry with an N,N′,O,O′ tetra­dentate Schiff base ligand in the basal plane and one thio­cyanate ligand at the apical site. The diethyl ether mol­ecule is located in a cavity provided by four O atoms of the ligand with weak C—H⋯O inter­actions, generating two short O⋯O contact distances [2.766 (3) and 2.745 (3) Å] between the diethyl ether mol­ecule and the ligand. The crystal structure is stabilized by the weak C—H⋯O and C—H⋯N inter­actions and π–π inter­actions between the naphthyl ring system and the benzene ring [centroid–centroid distance = 3.657 (5) Å] and between the two naphthyl ring systems [centroid–centroid distance = 4.305 (2) Å].
doi:10.1107/S1600536809000841
PMCID: PMC2968487  PMID: 21582048
19.  {μ-6,6′-Dimeth­oxy-2,2′-[propane-1,3-diylbis(nitrilo­methanylyl­idene)]di­phenolato}dimethano­ltrinitrato­samarium(III)zinc(II) methanol disolvate 
In the title complex, [SmZn(C19H20N2O4)(NO3)3(CH3OH)2]·2CH3OH, the ZnII ion is six-coordinated by two O atoms and two N atoms of the deprotonated Schiff base ligand and by two O atoms from methanol mol­ecules, forming a slightly distorted octa­hedral geometry. The SmIII ion is coordinated by six O atoms from three chelating nitrate ligands and four O atoms from the Schiff base ligand, forming a distorted bicapped square-anti­prismatic environment. In the crystal, inter­molecular O—H⋯O hydrogen bonds connect the complex mol­ecules and the two methanol solvent mol­ecules, forming (10) sheets.
doi:10.1107/S1600536811007641
PMCID: PMC3089085  PMID: 21754267
20.  {μ-6,6′-Dimeth­oxy-2,2′-[propane-1,3-diylbis(nitrilo­methyl­idyne)]diphenolato}dimethano­ltrinitratonickel(II)lanthanum(III) methanol disolvate 
In the title dinuclear complex, [NiLa(C19H20N2O4)(NO3)3(CH3OH)2]·2CH3OH, the NiII ion is coordinated by two O atoms and two N atoms of a Schiff base ligand and by two O atoms of two methanol ligands, forming a slightly distorted octa­hedral geometry. The LaIII ion is coordinated by six O atoms from three chelating nitrate ligands and four O atoms from the Schiff base ligand, forming a distorted bicapped square-anti­prismatic environment. In the crystal structure, inter­molecular O—H—O hydrogen bonds connect complex mol­ecules and methanol solvent mol­ecules, forming a two-dimensional network.
doi:10.1107/S1600536808026986
PMCID: PMC2960610  PMID: 21201643
21.  {μ-6,6′-Dimeth­oxy-2,2′-[propane-1,3-diylbis(nitrilo­methyl­idyne)]diphenolato}dimethano­ltrinitratonickel(II)samarium(III) methanol disolvate 
In the title complex, [NiSm(C19H20N2O4)(NO3)3(CH4O)2]·2CH3OH, the NiII ion is coordinated by two O atoms and two N atoms of a deprotonated Schiff base ligand and by two O atoms of two methanol ligands in a slightly distorted octa­hedral geometry. The SmIII ion is coordinated by six O atoms from three chelating nitrate ligands and four O atoms from a Schiff base ligand in a distorted bicapped square-anti­prismatic environment. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds connect complex mol­ecules and methanol solvent mol­ecules, forming (10) sheets.
doi:10.1107/S1600536808038920
PMCID: PMC2968130  PMID: 21581745
22.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}-μ-nitrato-dinitratoeuropium(III)zinc(II) 
In the title heteronuclear ZnII–EuIII complex [systematic name: {6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-κ4 O 1,O 1′,O 6,O 6′:2κ4 O 1,N,N′,O 1′}-μ-nitrato-1:2κ2 O:O′-dini­trato-1κ4 O,O′-europium(III)zinc(II)], [EuZn(C18H18N2O4)(NO3)3], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-methoxy­salicyl­idene)ethyl­enediamine (H2 L), the Eu and Zn atoms are triply bridged by two phenolate O atoms of the Schiff base ligand and one nitrate ion. The five-coordinate Zn atom is in a square-pyramidal geometry with the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The EuIII center has a ninefold coordination environment of O atoms, involving the phenol­ate O atoms, two meth­oxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. Weak inter­molecular C—H⋯O inter­actions generate a two-dimensional double-layer structure.
doi:10.1107/S160053680706151X
PMCID: PMC2914891  PMID: 21200648
23.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}-μ-nitrato-dinitratoterbium(III)zinc(II) 
In the title heteronuclear ZnII—TbIII complex (systematic name: {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′-μ-nitrato-1:2κ2 O:O′-dinitrato-1κ4 O,O′-terbium(III)zinc(II)), [TbZn(C18H18N2O4)(NO3)3], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-methoxy­salicyl­idene)ethyl­enediamine (H2 L), the Tb and Zn atoms are triply bridged by two phenolate O atoms of the Schiff base ligand and one nitrate ion. The five-coordinate Zn atom is in a square-pyramidal geometry with the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The TbIII center has a ninefold coordination environment of O atoms, involving the phenolate O atoms, two meth­oxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. Weak inter­molecular C—H⋯O inter­actions generate a two-dimensional layer structure.
doi:10.1107/S1600536808006958
PMCID: PMC2961047  PMID: 21202018
24.  {μ-6,6′-Dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}-μ-nitrato-dinitratoholmium(III)zinc(II) 
In the title heteronuclear ZnII–HoIII complex (systematic name: {μ-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′)-μ-nitrato-1:2κ2 O:O′-dinitrato-1κ4 O,O′-holmium(III)zinc(II)), [HoZn(C18H18N2O4)(NO3)3], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-methoxy­salicyl­idene)ethyl­enediamine (H2 L), the Ho and Zn atoms are triply bridged by two phenolate O atoms of the Schiff base ligand and one nitrate ion. The five-coordinate Zn atom is in a square-pyramidal geometry with the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The HoIII center has a ninefold coordination environment of O atoms, involving the phenolate O atoms, two meth­oxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. Weak inter­molecular C—H⋯O inter­actions generate a two-dimensional double-layer structure.
doi:10.1107/S1600536808013743
PMCID: PMC2961445  PMID: 21202491
25.  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.
doi:10.1107/S1600536810037153
PMCID: PMC3009179  PMID: 21588817

Results 1-25 (490590)