The two other pyridyl substituents are protonated and involved in intermolecular hydrogen bonding along with the metal-coordinated water and nitrate ligands. Compound (II) represents an extended hydrogen-bonded assembly between the tetrakis(pyridin-1-ium-4-yl)porphyrin tetracation, the [Dy(NO3)2(H2O...
Non-coordinated bdc anions balance the charge of the Fe-II centres and bridge adjacent one-dimensional chains through an extensive hydrogen-bonding network. The compound crystallizes in the centrosymmetric space group P2/c, which defines twofold axes along both the Fe-bpy chains and the bdc anions...
The basic structure of Cerium (III) Acetylacetonate Hydrate consists of a cerium ion coordinated with three acetylacetonate ligands and water molecules. The molecular formula of this compound is Ce(C5H7O2)3?xH2O. Cerium (III) Acetylacetonate Hydrate is sparingly soluble in water. Safety ...
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For the reactions of uramildiacetic acid both enthalpy and entropy changes are favourable and may be correlated with the “effective” ion radii of the metals; the complexes seem to retain coordinated water molecules and to have a coordination number which exceeds the possibilities of the ligand....
In the presence of ammonia, the two modes of this feature shift 2–3 cm− 1, showing that ammonia structurally perturbs this asymmetrically hydrogen-bonded water molecule, but does not replace it as a possible ligand to Mn [138]. In T. elongatus, the S3-minus-S2, S0-minus-S3, and ...
Hydrogen Bond Donor Count:4 Hydrogen Bond Acceptor Count:7 Topological Polar Surface Area:67.2 Heavy Atom Count::11 Defined Atom Stereocenter Count:0 Undefined Atom Stereocenter Count:0 Defined Bond Stereocenter Count:0 Undefined Bond Stereocenter Count:0 Isotope Atom Count:0 Covalently-Bonded Unit...
The un-coordinated 'adduct' molecule is a HDCPA counter anion which is strongly hydrogen-bonded to the coordinated H 2 DCPA ligand [O···O, 2.503(6) ] while a number of peripheral intra- and intermolecular hydrogen-bonding interactions give a two-dimensional network structure. GraphicalThe ...
Other than Gln98, only water is involved in hydrogen bonding to the linker region. Superposition of the four structures, Fig. 3(f), reveals subtle differences in the binding mode. The accommo- dation of the four, five, six or eight carbons in the linker is seen at the top of Fig....
In the crystal, extensive O—H⋯O hydrogen-bonding interactions involving the coordinated water molecules and the non-coordinating nitrate anions, as well as the oxygen atoms of the acetate groups, generate an overall three-dimensional supramolecular network....