PMCC PMCC

Search tips
Search criteria

Advanced
Results 1-25 (535561)

Clipboard (0)
None

Related Articles

1.  catena-Poly[[cadmium-bis­(μ-triethyl­ene­tetra­mine-κ4 N,N′:N′′,N′′′)-cadmium-(μ-triethyl­ene­tetra­mine-κ4 N,N′:N′′,N′′′)] hexa­fluoridogermanate] 
The title fluoridogermanate, {[Cd2(C6H18N4)3][GeF6]}n, was synthesized hydro­thermally. The crystal structure comprises undulated cationic [Cd2(TETA)3]4+ chains (TETA is triethyl­ene­tetra­mine) propagating parallel to [101]. The central CdII atom is six-coordinated in a CdN6 set by three TETA ligands. The isolated [GeF6]2− units, serving as counter-anions, occupy the inter-chain spaces and simultaneously link adjacent chains into a three-dimensional network through extensive N—H⋯F hydrogen-bonding inter­actions. One of the ethyl­ene bridges of one TETA ligand is disordered around a twofold rotation axis.
doi:10.1107/S1600536811033381
PMCID: PMC3200897  PMID: 22058875
2.  Bis[tris­(ethyl­enediamine-κ2 N,N′)cobalt(III)] octa­kis-μ-3-oxido-hexa­deca-μ2-oxido-tetra­deca­oxido-μ12-tetra­oxo­silicato-octa­molybdenum(VI)hexa­vanadium(IV,V) hexa­hydrate 
The title compound, [Co(C2H8N2)3]2[SiMo8V4O40(VO)2]·6H2O, was prepared under hydro­thermal conditions. The asymmetric unit consists of a transition metal complex [Co(en)3]3+ cation (en is ethyl­enediamine), one half of an [SiMo8V4O40(VO)2]6− heteropolyanion, two solvent water mol­ecules in general positions and two half-mol­ecules of water located on a mirror plane. In the complex cation, the Co3+ ion is in a distorted octa­hedral coordination environment formed by six N atoms of the three chelating en ligands. One of the en ligands exhibits disorder of its aliphatic chain over two sets of sites of equal occupancy. The [SiMo8V4O40(VO)2]6− heteropolyanion is a four-electron reduced bivanadyl-capped α-Keggin-type molybdenum–vanadium–oxide cluster. In the crystal, it is located on a mirror plane, which results in disorder of the central tetra­hedral SiO4 group: the O atoms of this group occupy two sets of sites related by a mirror plane. Furthermore, all of the eight μ2-oxide groups are also disordered over two sets of sites with equal occupancy. There are extensive inter­molecular N—H⋯O hydrogen bonds between the complex cations and inorganic polyoxidoanions, leading to a three-dimensional supra­molecular network.
doi:10.1107/S1600536811048197
PMCID: PMC3238691  PMID: 22199568
3.  Tris(ethyl­enediamine)zinc(II) hexa­fluorido­silicate 
The title compound, [Zn(C2H8N2)3](SiF6), was synthesized ionothermally using choline chloride–imidazolidone as solvent and template provider. In the crystal structure, the anions and cations are located on special positions of site symmetry 3.2 and show a typical octa­hedral geometry. The ZnII ion is coordinated by six N atoms from three ethyl­enediamine mol­ecules. The crystal structure displays weak hydrogen bonding between [SiF6]2− anions and the ethyl­enediamine NH hydrogen atoms.
doi:10.1107/S1600536809045693
PMCID: PMC2972015  PMID: 21578568
4.  Tris(ethyl­enediamine)manganese(II) sulfate 
In the title compound, [Mn(C2H8N2)3]SO4, the metal atom (site symmetry 3.2) is coordinated by six N atoms from three ethyl­enediamine (en) ligands in a slightly distorted octa­hedral geometry. The en ligands are generated from one half-mol­ecule in the asymmetric unit. The O atoms of the sulfate anion (S site symmetry 3.2) are disordered over four orientations in a 0.220 (12):0.210 (13):0.203 (14):0.10 (2) ratio, with one of the O atoms having site symmetry 3. In the crystal, the ions are connected by N—H⋯O hydrogen bonds, forming a three-dimensional network.
doi:10.1107/S1600536809034874
PMCID: PMC2970169  PMID: 21577720
5.  μ3-Dodeca­tungsto(V,VI)aluminato-κ3 O:O′:O′′-tris­[aqua­bis­(ethyl­ene­diamine-κ2 N,N′)copper(II)] 
The title compound, [AlCu3W12O40(C2H8N2)6(H2O)3], was prepared under hydro­thermal conditions. The Cu2+ ion displays an elongated octa­hedral geometry defined by one bridging O atom from the polyoxidoanion and a coordinated water mol­ecule in axial positions and four N atoms of the two chelating ethyl­enediamine (en) ligands in equatorial positions. The one-electron reduced [AlW12O40]6− anion coordinates three [Cu(en)(H2O)]2+ fragments, generating a neutral tri-supported Keggin-type polyoxidometalate (POM). This tri-supported POM is located in a special position of symmetry and therefore O atoms from the central AlO4 tetra­hedron are disordered over two sets of sites. Disorder is also observed for three other bridging O atoms of the POM. In the crystal, mol­ecules are connected via N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional framework.
doi:10.1107/S1600536811048288
PMCID: PMC3238692  PMID: 22199569
6.  Di-μ-chlorido-bis­[bis­(ethyl­enediamine-κ2 N,N′)cadmium(II)] dichloride 
The crystal structure of the title compound, [Cd2Cl2(C2H8N2)4]Cl2, consists of binuclear centrosymmetric [Cd2(C2H8N2)4Cl2]2+ cations and discrete chloride anions. The CdII cation is coordinated by four N atoms of two ethyl­enediamine ligands and two symmetry-related chloride anions within a distorted CdN4Cl2 octa­hedron. Two CdII cations are connected by two chloride anions via μ2-coordination, forming a four-membered Cd2Cl2 ring. The uncoordinated chloride anions are linked to the amino groups via N—H⋯Cl hydrogen bonding. Two C atoms of one of the two crystallographically independent ethyl­enediamine ligands are disordered and were refined using a split model [occupancy ratio 0.674 (9):0.326 (9)].
doi:10.1107/S1600536809054804
PMCID: PMC2980226  PMID: 21579987
7.  Diaqua­bis(ethyl­enediamine-κ2 N,N′)copper(II) 2,2′-dithio­dinicotinate sesquihydrate 
In the title compound, [Cu(C2H8N2)2](C12H6N2O4S2)·1.5H2O, there are two half-molecules of the cationic complex in the asymmetric unit. The Cu2+ ions lie on inversion centres and are octa­hedrally coordinated by two ethyl­enediamine (en) and two aqua ligands in a typical Jahn–Teller distorted environment with the water O atoms in the axial positions. Two 2-mercaptonicotinate units (mnic) are linked by a disulfide bridge. All the ethyl­enediamine N—H and O—H groups form inter­molecular hydrogen bonds with acceptor O and N atoms, giving rise to a three-dimensional network. One of the uncoordinated water molecules has a site occupation factor of 0.5.
doi:10.1107/S1600536809022612
PMCID: PMC2969337  PMID: 21582723
8.  The one-dimensional coordination polymer poly[tetra­kis­[(4-chloro­phen­yl)methanaminium] [cadmate-μ-cyclo­hexa­phospho­rato]] 
Cyclo­hexa­phospho­ric acid (P6O18H6) reacts with cadmium carbonate and 4-chloro­benzyl­amine (CBA) to give the mononuclear title complex, (C7H9ClN)4[Cd(P6O18)]n, in which the CdII atom, lying on an inversion centre, has an octa­hedral coordination built of six O atoms of two centrosymmetric P6O18 rings. Each P6O18 ligand acts as a bridge, linking two CdII atoms and forming an anionic coordination polymer [Cd(P6O18)4−]n extending along [010]. Adjacent polymeric chains are connected through N—H⋯O and C—H⋯O hydrogen bonds, generating a three-dimensional supra­molecular network.
doi:10.1107/S160053681104133X
PMCID: PMC3246971  PMID: 22219791
9.  Poly[tetra­deca­aqua­tetra­kis­(μ3-1H-imidazole-4,5-dicarboxyl­ato)tetra-μ3-sulfato-cobalt(II)hexa­gadolinium(III)] 
The asymmetric unit of the title compound, [CoGd6(C5H2N2O4)4(SO4)6(H2O)14]n, contains a CoII ion (site symmetry ), three GdIII ions, two imidazole-4,5-dicarboxyl­ate ligands, three SO4 2− anions, and seven coordinated water mol­ecules. The CoII ion is six-coordinated by two O atoms from water mol­ecules, two O atoms and two N atoms from two imidazole-4,5-dicarboxyl­ate ligands, giving a slightly distorted octa­hedral geometry. The GdIII ions exhibit three types of coordination environments. One Gd ion is eight-coordinated in a bicapped trigonal–prismatic geometry by four O atoms from two imidazole-4,5-dicarboxyl­ate ligands, two O atoms from two SO4 2− anions and two coordinated water mol­ecules. The other Gd ions are nine-coordinated in a tricapped trigonal–prismatic geometry; one of these Gd ions is bonded to four O atoms from two imidazole-4,5-dicarboxyl­ate ligands, three O atoms from three SO4 2− anions and two water O atoms and the other Gd ion is coordinated by one O atom and one N atom from one imidazole-4, 5-dicarboxyl­ate ligand, five O atoms from three SO4 2− anions as well as two coordinated water mol­ecules. These metal coordination units are connected by bridging imidazole-4,5-dicarboxyl­ate and sulfate ligands, generating a three-dimensional network. The crystal structure is further stabilized by N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding inter­actions between water mol­ecules, SO4 2− anions, and imidazole-4,5-dicarboxyl­ate ligands.
doi:10.1107/S1600536811026821
PMCID: PMC3212143  PMID: 22090845
10.  Tris(ethyl­enediamine)cobalt(II) sulfate 
The structure of the title compound, [CoII(C2H8N2)3]SO4, the cobalt example of [M(C2H8N2)3]SO4, is reported. The Co and S atoms are located at the 2d and 2c Wyckoff sites (point symmetry 32), respectively. The Co atom is coordinated by six N atoms of three chelating ethyl­enediamine mol­ecules generated from half of the ethyl­enediamine mol­ecule in the asymmetric unit. The O atoms of the sulfate anion are disordered mostly over two crystallographic sites. The third disorder site of O (site symmetry 3) has a site occupancy approaching zero. The H atoms of the ethyl­enediamine mol­ecules inter­act with the sulfate anions via inter­molecular N—H⋯O hydrogen-bonding inter­actions.
doi:10.1107/S1600536810016168
PMCID: PMC2979650  PMID: 21579283
11.  Tris(ethyl­enediamine-κ2 N,N′)nickel(II) bis­(dimethyl phosphate) 
In the title compound, [Ni(C2H8N2)3][O2P(OCH3)2]2, the NiII atom is six-coordinated in a distorted octa­hedral geometry by six N atoms from three ethyl­enediamine ligands. The P atoms of the anions adopt a distorted tetra­hedral geometry. In the crystal, inter­molecular N—H⋯O and C—H⋯O hydrogen bonds link the cations and anions into a three-dimensional network.
doi:10.1107/S1600536812029984
PMCID: PMC3414105  PMID: 22904712
12.  Bis(ethyl­enediamine-κ2 N,N′)(nitrato-κ2 O,O′)cobalt(III) hydroxide nitrate 
The Co ion in the title salt, [Co(NO3)(H2NCH2CH2NH2)2](OH)(NO3), has oxidation state + III and is coordinated by four N atoms from two ethyl­enediamine mol­ecules and two O atoms from a nitrate anion in a distorted octa­hedral geometry. The charge of the complex cation is balanced by a hydroxide anion and a nitrate anion. The cations and anions are connected by N—H⋯O and O—H⋯O hydrogen bonds, resulting in a three-dimensional supra­molecular framework. There are two independent ion pairs with similar configurations in the unit cell. Both uncoordinated nitrate counter-anions are disordered.
doi:10.1107/S160053680903219X
PMCID: PMC2969983  PMID: 21577449
13.  Di-μ3-chlorido-tetra-μ2-chlorido-dichloridobis(dimethyl­formamide-κO)hexa­kis­(1H-imidazole-κN 3)tetra­cadmium 
The centrosymmetric mol­ecule of the title complex, [Cd4Cl8(C3H4N2)6(C3H7NO)2], contains four CdII atoms, six imidazole, two dimethyl­formamide and eight chloride ligands. The structure shows a novel chloride-bridged tetra­nuclear cadmium quasi-cubane cluster. The coordination geometry of all CdII atoms is distorted octa­hedral, with the two metal atoms in the asymmetric unit in different coordination environments. One of the Cd2+ ions is coordinated by five Cl− ions and by one N atom from an imidazole ligand, while the second is coordinated by three chloride ligands, two N atoms from two imidazole ligands and one O atom from a dimethyl­formamide mol­ecule. Inter­molecular N—H⋯Cl hydrogen bonds link the mol­ecules into a two-dimensional polymeric structure parallel to the ab plane.
doi:10.1107/S1600536811037834
PMCID: PMC3201276  PMID: 22058708
14.  Poly[[hexa­aqua­bis­(μ3-benzene-1,3,5-tricarboxyl­ato-κ3 O 1:O 3:O 5)bis­(5,5′-dimethyl-2,2′-bipyridine-κ2 N,N′)trizinc] hexa­hydrate] 
In the title compound, {[Zn3(C9H3O6)2(C12H12N2)2(H2O)6]·6H2O}n, one ZnII atom, lying on an inversion center, is six-coordinated by two O atoms from two benzene-1,3,5-tricarboxyl­ate (btc) ligands and four water mol­ecules in a distorted octa­hedral geometry. The other ZnII atom is five-coordinated by two N atoms from a 5,5′-dimethyl-2,2′-bipyridine (dmbpy) ligand, two O atoms from two btc ligands and one water mol­ecule in a distorted trigonal–bipyramidal geometry. The compound features a one-dimensional ladder structure, with windows of ca 10.245 (1) × 15.446 (2) Å. The ladders are linked together by inter­molecular O—H⋯O hydrogen bonds and π–π inter­actions between the benzene rings and between the pyridine rings [centroid-to-centroid distances 3.858 (2) and 3.911 (3) Å, respectively] to form a three-dimensional supra­molecular structure. One of the lattice water molecules is disordered over two positions in a 0.592:0.408 ratio.
doi:10.1107/S1600536811022173
PMCID: PMC3152031  PMID: 21836906
15.  Bis(ethyl­enediamine-κ2 N,N′)bis­(phenytoinato-κN)cobalt(II) 
The title compound [systematic name: bis(2,5-dioxo-4,4-diphenylimidazolidin-1-ido-κN 1)bis(ethylenediamine-κ2 N,N′)cobalt(II)], [Co(C15H11N2O2)2(C2H8N2)2], has site symmetry . The CoII cation is located on an inversion center and coordinated by two phenytoin anions and two ethyl­enediamine ligands in a distorted octa­hedral geometry. In the phenytoin anion, the two phenyl rings are twisted with respect to the central hydantoin ring, making dihedral angles of 77.49 (16) and 64.55 (15)°. Intra­molecular and inter­molecular N—H⋯O hydrogen bonding is present in the crystal structure.
doi:10.1107/S1600536809044092
PMCID: PMC2971365  PMID: 21578194
16.  Tris(ethyl­enediamine)­nickel(II) 1H-pyrazole-3,5-dicarboxyl­ate 1.67-hydrate 
The asymmetric unit of the title compound, [Ni(C2H8N2)3](C5H2N2O4)·1.67H2O, consists of three [Ni(en)3]2+ dications (en is ethyl­enediamine), three [(pzdc)3]2− dianions (pzdc is pyrazole-3,5-dicarboxyl­ate) and five water mol­ecules. In each complex dication, the NiII atom is coordinated by six N atoms from three en ligands forming a distorted octa­hedral coordination geometry. In the crystal, the ions and water mol­ecules are linked into a three-dimensional framework by a large number of N—H⋯O and O—H⋯O hydrogen bonds.
doi:10.1107/S1600536810027066
PMCID: PMC3007365  PMID: 21588159
17.  Poly[[hexa­kis­(μ-benzene-1,4-dicarboxyl­ato)octa­kis­(N,N-dimethyl­acetamide)­hexa­manganese(II)] monohydrate] 
In the title compound, {[Mn6(C8H4O4)6(C4H9NO)8]·H2O}n, two of the Mn atoms are six-coordinated by six O atoms from three benzene-1,4-dicarboxyl­ate (bdc) ligands and two trans DMA (dimethyl­acetamide) mol­ecules, whereas two other Mn atoms, located on inversion centers, are both in octa­hedral coordinations by six bdc O atoms. The discrete trinuclear manganese secondary building units (SBU) of Mn3(O2CR)6 ({–Mn—Mn—Mn-}) are linked through bdc ligands, forming a chain, while the discrete trinuclear SBU of {–Mn—Mn—Mn-} are bridged, forming another chain]. The two types of chains are linked through bdc ligands, resulting in the formation of a layer with 36 topology. Weak O—H⋯O and O—H⋯N hydrogen-bonding inter­actions involving the disordered water molecule (half-occupation) extend the two-dimensional layers into a three-dimensional supra­molecular framework.
doi:10.1107/S1600536811020010
PMCID: PMC3151841  PMID: 21836847
18.  Crystal structure of trans-(1,8-dibutyl-1,3,6,8,10,13-hexa­aza­cyclo­tetra­decane-κ4 N 3,N 6,N 10,N 13)bis­(5-methyltetra­zolato-κN)nickel(II) from synchrotron data 
The NiII ion in the title compound shows a slightly distorted octa­hedral coordination geometry with four N atoms of the aza­macrocylic ligand and two N atoms of the 5-methyl-1H-tetra­zolate ions. In the crystal, mol­ecules are connected by an N—H⋯N hydrogen bond, forming a supra­molecular sheet structure.
The structure of the title compound, [Ni(C2H3N4)2(C16H38N6)], has been characterized from synchrotron radiation. The asymmetric unit consists of one half of the NiII complex mol­ecule, which is related to the other half-mol­ecule by an inversion center. The NiII ion is coordinated by four secondary N atoms of the macrocyclic ligand in a square-planar fashion in the equatorial plane and by two N atoms of the 5-methyltetra­zolate anions in axial positions, resulting in a tetra­gonally distorted octa­hedral geometry. The average equatorial Ni—N bond length [2.060 (8) Å] is shorter than the axial Ni—N bond length [2.2183 (11) Å]. An intra­molecular N—H⋯N hydrogen bond between the secondary amine N atom of the macrocyclic ligand and the non-coordinating N atom of the 5-methyltetra­zolate ion stabilizes the mol­ecular structure. Moreover, an inter­molecular N—H⋯N hydrogen bond between the macrocyclic ligand and 5-methyltetra­zolate group gives rise to a supra­molecular sheet structure parallel to the bc plane.
doi:10.1107/S2056989015000651
PMCID: PMC4384631  PMID: 25878811
crystal structure; aza­macrocyclic ligand; Jahn–Teller distortion; tetra­zole derivatives; synchrotron data
19.  catena-Poly[diammonium [diaqua­bis(pyridine-2,4-dicarboxyl­ato-κ2 N,O 2)cuprate(II)] [[diaqua­copper(II)]-μ-pyridine-2,4-dicarboxyl­ato-κ3 N,O 2:O 2′-[tetra­aqua­cadmium(II)]-μ-pyridine-2,4-dicarboxyl­ato-κ3 O 2:N,O 2′] hexa­hydrate] 
The title mixed-metal complex, {(NH4)2[Cu(C7H3NO4)2(H2O)2][CdCu(C7H3NO4)2(H2O)6]·6H2O}n, contains one octa­hedrally coordinated CdII center and two octa­hedrally coordinated CuII centers, each lying on an inversion center. The two CuII atoms are each coordinated by two O atoms and two N atoms from two 2,4-pydc (2,4-H2pydc = pyridine-2,4-dicarboxylic acid) ligands in the equatorial plane and two water mol­ecules at the axial sites, thus producing two crystallographically independent [Cu(2,4-pydc)2(H2O)2]2− metalloligands. One metalloligand exists as a discrete anion and the other connects the Cd(H2O)4 units, forming a neutral chain. O—H⋯O and N—H⋯O hydrogen bonds connects the polymeric chains, complex anions, ammonium cations and uncoordinated water mol­ecules into a three-dimensional supra­molecular network.
doi:10.1107/S1600536809046911
PMCID: PMC2971796  PMID: 21578603
20.  Hexaaqua­hexa­kis(μ2-3,5-diamino-4H-1,2,4-triazole)trinickel(II) tris­(hexa­fluoridosilicate) icosa­hydrate 
The trinuclear cation of the title compound, [Ni3(C2H5N5)6(H2O)6][SiF6]3·20H2O, has the six 3,5-diamino-1,2,4-triazole ligands each bridging two metal atoms; the metal atom in the middle, which lies on a special position (of 32 site symmetry), is connected to six N atoms in an octa­hedral geometry. The other metal atom, which lies on a special position (of 3 site symmetry), is connected to three N atoms and three O atoms. One hexa­fluroridosilicate anion lies on a site of 3 symmetry and the other lies on a site of symmetry. The hexa­cation, dianions and uncoordinated water mol­ecules inter­act through hydrogen bonds to form a three-dimensional network. One uncoordinated water molecule is disordered, with site occupancy 0.3.
doi:10.1107/S1600536808013329
PMCID: PMC2961398  PMID: 21202489
21.  trans-Diaqua­bis(ethyl­enediamine-κ2 N,N′)copper(II) bis[3-(3-pyrid­yl)propionate] dihydrate 
The asymmetric unit of the title complex, [Cu(C2H8N2)2(H2O)2](C8H8NO2)2·2H2O, contains one anion, one half-cation and one water mol­ecule. The CuII atom in the [Cu(en)2(H2O)2]2+ cation (en is ethyl­enediamine) lies on an inversion centre. The four N atoms of the en ligands in the equatorial plane around the CuII atom form a slightly distorted square-planar arrangement, while the slightly distorted Jahn–Teller octa­hedral coordination is completed by two water O atoms in axial positions. In the crystal structure, intra- and inter­molecular N—H⋯O and O—H⋯O hydrogen bonds form a three-dimensional network.
doi:10.1107/S1600536808005400
PMCID: PMC2960896  PMID: 21201981
22.  Tris(ethane-1,2-diamine-κ2 N,N′)nickel(II) 5-hy­droxy­isophthalate monohydrate 
The asymmetric unit of the title compound, [Ni(C2H8N2)3](C8H4O5)·H2O, contains one [Ni(en)3]2+ cation (en is ethane-1,2-diamine), one 5-hy­droxy­isophthalate dianion and one water mol­ecule. In the cation, the Ni2+ ion is coordinated by six N atoms from three ethyl­enediamine ligands in a distorted octa­hedral geometry. The complex ions and water mol­ecules are linked by weak N—H⋯N/O and O—H⋯N/O hydrogen bonds into a three-demensional structure.
doi:10.1107/S1600536811001449
PMCID: PMC3051561  PMID: 21522910
23.  Ethyl­enedi­ammonium sodium tetra­kis­[bis­(ethyl­enedi­amine-κ2 N,N′)(oxalato-κ2 O 1,O 2)cobalt(III)] [penta­hydrogen di(phosphato­octa­deca­tungstate)] tetra­deca­hydrate 
The title compound, Na(C2H10N2)[Co(C2O4)(C2H8N2)2]4[H5(P2W18O62)2]·14H2O, prepared under hydro­thermal conditions, consists of two Dawson-type [P2W18O62]6− anions, four isolated [Co(en)2(ox)]+ cations (en = ethyl­enedi­amine and ox = oxalate), one Na+ cation, one [H2en]2+ cation, and a number of ordered (14) and disordered solvent water mol­ecules. The [P2W18O62]6− polyoxidometalate anion has site symmetry 1 and contains two structurally distinct types of W atoms: viz. six W atoms on vertical pseudo-mirror planes grouped in two sets of three, and 12 equatorial W atoms that do not lie in the pseudo-mirror planes grouped in two sets of six. In each [Co(en)2(ox)]+ cation, the CoIII ion is coordinated by four N atoms from two en ligands and two O atoms from the ox ligands, completing a distorted octa­hedral structure. The sodium cation lies on an inversion centre and additionally links the complex cations and anions. In the crystal, the various units are linked by N—H⋯O and O—H⋯O hydrogen bonds, which together with C—H⋯O hydrogen bonds form a three-dimensional structure. The contribution of a region of disordered electron density, possibly highly disordered solvent water mol­ecules, to the scattering was removed with the SQUEEZE option of PLATON [Spek (2009 ▶). Acta Cryst. D65, 148–155]. To equilibrate the charges five H+ ions have been added to the polyoxidometalate. These H+ ions and the disordered solvent contribution were not included in the reported mol­ecular weight and density.
doi:10.1107/S160053681302583X
PMCID: PMC3884260  PMID: 24454036
24.  Diaqua­(2,2′-bipyridine-5,5′-dicarboxyl­ato-κ2 N,N′)(ethyl­enediamine-κ2 N,N′)copper(II) 2.5-hydrate 
In the mol­ecule of the title compound, [Cu(C12H6N2O4)(C2H8N2)(H2O)2]·2.5H2O, the CuII atom is six-coordinated in a distorted octa­hedral configuration by two N atoms from a 2,2′-bipyridine-5,5′-dicarboxyl­ate anion, two N atoms from ethyl­enediamine and two O atoms from two water mol­ecules. There are also two and a half water mol­ecules in the asymmetric unit. The planar five-membered ring is nearly coplanar with the adjacent pyridine rings, while the other five-membered ring adopts a twisted conformation, probably due to hydrogen bonding. In the crystal structure, intra- and inter­molecular N—H⋯O and O—H⋯O hydrogen bonds link the mol­ecules.
doi:10.1107/S1600536808029061
PMCID: PMC2959425  PMID: 21201030
25.  Bis(ethyl­enediamine-κ2 N,N′)bis­(methanol-κO)copper(II) benzene-1,4-dicarboxyl­ate methanol disolvate 
In the cation of the title compound, [Cu(C2H8N2)2(CH3OH)2](C8H4O4)·2CH3OH, the CuII atom lies on an inversion centre. The four N atoms of two ethyl­enediamine ligands around the CuII atom form the equatorial plane, while two methanol O atoms in the axial positions complete a Jahn–Teller distorted octa­hedral coordination. The benzene-1,4-dicarboxyl­ate anion is centrosymmetric. In the crystal, C—H⋯O, N—H⋯O and O—H⋯O hydrogen bonds link the cations, the anions and the methanol solvent mol­ecules.
doi:10.1107/S1600536812028942
PMCID: PMC3393248  PMID: 22807708

Results 1-25 (535561)