1,721,054 research outputs found

    Cyclooctatetraenyl complexes of the early transition metals and lanthanides. 13. The first organolanthanide complex of the tripod ligand [(C5H5)Co{P(O)(OEt)(2)}(3)](-)

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    The reaction of [(eta(8)-C8H8)Sm(mu-Cl)(THF)](2) (1) with Na[(C5H5)Co{P(O)(OEt)(2)}(3)] (2) in a molar ratio of 1:2 in THF solution affords orange, crystalline (eta(8)-C8H8)Sm[(C5H5)Co-{P(O)(OEt)(2)}(3)] (3) as the first organolanthanide complex containing Klaui's tripod ligand. The compound has been fully characterized by elemental analysis and spectroscopic methods

    Diagnosis of Heart Failure with Preserved Ejection Fraction

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    Heart failure with preserved ejection fraction (HFpEF) constitutes a growing health care burden worldwide. Although definitions vary somewhat among guidelines, in general the presence of typical heart failure symptoms and signs in combination with a preserved left ventricular ejection fraction (>= 50%) and functional and/or structural left ventricular changes makes the diagnosis likely. This review focuses on the current understanding of diagnostic criteria, as presented in current guidelines and consensus recommendations, and on new insights from recent papers. The role of comorbidities that often contribute to symptoms and hamper the HFpEF diagnostics is also reviewed

    Dichloro(dimethylsulfoximino)phosphane

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    The title compound, C2H6Cl2NOPS, crystallizes as dimers via C - H center dot center dot center dot O hydrogen bonds. S - N [ 1.5446 ( 16) angstrom] is shorter than P - N [ 1.618 ( 2) angstrom], although the latter is a short phosphorus - nitrogen single bond

    Struktur von [CPRu(C0)2]2 (Cp = η5-pentamethylcyclopentadienyl)

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    The molecular structure of di-μ-carbonyl-bis[carbonyl(η5-pentamethylcyclopentadienyl)ruthenium] (Ru---Ru) has been determined by a single-crystal X-ray diffraction study (monoclinic, space group P21/n,a = 979.90(9), b = 831.91(7), c = 1427.75(12) pm, β = 100.026(9)°, R = 0.018). In the solid state the complex exists solely as the trans-carbonyl bridged isomer. The Ru---Ru bond length is 275.2(1) pm

    Dimere Alkalimetallbenzamidinate: Einfluß des metallions auf die struktur

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    The molecular structures of two N-silylated alkali metal benzamidinates, [MeC6H4C(NSiMe3)2-Li(THF)]2 1 and [PhC(NSiMe3)2Na(Et2O)]2·Et2O 2, have been determined by low temperature X-ray diffraction studies. Both compounds are dimeric in the solid state but the molecular structures are strongly influenced by the alkali metal used. The Na---Na distance in 2 is unusually short (274.1 pm). The preparation of K[PhC(NSiMe3)2] (3) is also described
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