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1.  Tris(ethyl­enediamine-κ2 N,N′)cadmium hexa­fluoridogermanate 
In the title compound, [Cd(C2H8N2)3](GeF6), the CdII atom, lying on a 32 symmetry site, is coordinated by six N atoms from three ethyl­enediamine (en) ligands in a distorted octa­hedral geometry. The Ge atom also lies on a 32 symmetry site and is coordinated by six F atoms. The en ligand has a twofold rotation axis passing through the mid-point of the C—C bond. The F atom is disordered over two sites with equal occupancy factors. In the crystal, the [Cd(en)3]2+ cations and [GeF6]2− anions are connected through N—H⋯F hydrogen bonds, forming a three-dimensional supra­molecular network.
PMCID: PMC3343808  PMID: 22589782
2.  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.
PMCID: PMC3200897  PMID: 22058875
3.  Bis(μ-N,N′,N′′-tri-3-pyridylpyridine-1,3,5-tricarboxamide-κ2 N:N′)bis­[di­chloridomercury(II)] methanol disolvate 
The title dinuclear centrosymmetric complex, [Hg2Cl4(C24H18N6O3)2]·2CH3OH, comprises HgII atoms coordinated by two Cl atoms and two N atoms from ligands in a distorted tetra­hedral geometry. The solvent mol­ecules are linked by hydrogen bonds.
PMCID: PMC3151944  PMID: 21836858
4.  Bis(ethyl­enediammonium) tetra­deca­borate 
The title compound, 2C2H10N2 2+·B14O20(OH)6 4−, consists of a centrosymmetric tetra­deca­borate anion and two ethyl­enediammonium cations. The anions are inter­connected through strong O—H⋯O hydrogen bonds into a three-dimensional supra­molecular network with channels along [100], [010], [001] and [111]. The diprotonated cations reside in the channels and inter­act with the inorganic framework by extensive N—H⋯O hydrogen bonds.
PMCID: PMC2983971  PMID: 21580636
5.  3,6-Dihydr­oxy-2′-[(2-hydr­oxy-1-naphth­yl)methyl­eneamino]xanthene-9-spiro-1′-isoindolin-3′-one acetonitrile solvate 
The title compound, C31H20N2O5·C2H3N, was synthesized by the reaction of fluorescein hydrazide and excess 2-hydr­oxy-1-naphthaldehyde in acetonitrile. The spirolactam ring is planar and is nearly at right angles to the two benzene rings of the xanthene system. The dihedral angle between the two benzene rings of the xanthene system is 9.92 (4)°. In the crystal structure, the mol­ecules are linked into extended two-dimensional networks by inter­molecular hydrogen bonding. Acetonitrile mol­ecules are located in the voids between the two-dimensional networks.
PMCID: PMC2960338  PMID: 21201469

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