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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 341-348 
    ISSN: 1434-1948
    Keywords: N ligands ; S ligands ; Iron ; Ruthenium ; Pentadentate ligands ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In order to obtain iron and ruthenium complexes which are analogous to [M(L)(′NHS4′)] and [M(L)(′N2H2S3′)] complexes [′NHS4′2- = 2,2′-bis(2-mercaptophenylthio)diethylamine(2-), ′N2H2S3′2- = 2,2′-bis(2-mercaptophenylamino)diethylsulfide(2-)] but have electron-richer metal centers, the new pentadentate amine thiolate ligand ′N3H3S2′-H2 [ = 2,2′-bis(2-mercaptophenylamino)diethylamine] (4) was synthesized. The dianion ′N3H3S2′2- reacted with FeII salts to give high-spin [Fe(′N3H3S2′)] (5) [μeff (293 K) = 3.94 μB], which yielded diamagnetic [Fe(CO)(′N3H3S2′)] (6) upon reaction with CO. Complex 6 exhibits a low-frequency ν(CO) band (1934 cm-1 in THF) indicating an electron-rich Fe center and a strong Fe-CO bond. In spite of this, 6 readily dissociated in solution to 5 and CO. The reaction of [RuCl2(PPh3)3] with ′N3H3S2′2- yielded [Ru(PPh3)(′N3H3S2′)] (7), which proved inert with respect to PPh3 substitution but could be methylated at the thiolate donors. The resulting [Ru(PPh3)(′N3H3S2′-Me2)]I2 (8) proved as inert towards substitution as 7. Complex 8 could reversibly be deprotonated to give [Ru(PPh3)(′N3H2S2′-Me2)]I (11), in the course of which the [RuPN3S2] cores rearrange from CS to C1 symmetry. Reversible protonation/deprotonation was also found with [Ru(NO)(′N3H2S2′)] (9) which formed from [RuCl3(NO)(PPh3)2] and ′N3H3S2′2- in the presence of one additional equivalent of LiOMe. Protonation of 9 with HBF4 gave [Ru(NO)(′N3H3S2′)]BF4 (10). The NMR spectra and the X-ray structure analysis of 8 proved that the [RuPN3S2] cores of 7 and 8 exhibit a CS-symmetrical meso structure. In all other complexes, however, the [MLN3S2] cores exhibit a C1-symmetrical structure. It results from the fac-mer coordination mode of the ′N3H3S2′2- ligand and favors the planarization of amide donors when NH functions are reversibly deprotonated.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Silver(I) complexes, phosphazane ligands ; X-ray structure ; vibrational and NMR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Polyfunctional Molecules. 124. Silver(I) Complexes Containing the Ligands Bis(diphenylphosphanyl)amine, -amide and Tris(diphenylphosphanyl)amineBis(diphenylphosphanyl)amine HN(PPh2)2 (1) reacts with AgCl to the complex HN(PPh2AgCl)2 (5) for which in the solid state the cluster structure Ag4Cl4[HN(PPh2)2]2 is assumed. Reaction of 5 with LiN(PPh2)2 (2) gives the known [N(PPh2AgPh2P)2N] (8) and the new complex [Ag(μ - Ph2PNPPh2)2(μ - Ph2PNHPPh2)Ag] · dioxane (7 · dioxane). The compound 7 · dioxane has been characterized by X-ray diffraction. The molecules are found to contain a bicyclo[3.3.3]undecane-type structure with trigonal planar coordinated silver atoms, which are separated by 281,6(1) pm. The dioxane is bound via H-bridge bond to the NH group of the coordinated HN(PPh2)2. Treatment of 8 with ClPPh2 yields N(PPh2AgCl)3 (12), which has also been obtained by the reaction of N(PPh2)3 (3) with silver chloride. All the compounds have been characterized, so far as possible, by IR, Raman, 1H NMR, 31P{1H} NMR, 13C{1H} NMR and mass spectroscopy.
    Notes: Bis(diphenylphosphanyl)amin, HN(PPh2)2 (1), reagiert mit AgCl zu dem Komplex HN(PPh2AgCl)2 (5), für den aufgrund spektroskopischer Daten im Festzustand die dimere Clusterstruktur Ag4Cl4[HN(PPh2)2]2 angenommen wird. Die Umsetzung von 5 mit LiN(PPh2)2 (2) in Dioxan liefert die bereits bekannte Verbindung [N(PPh2AgPh2P)2N] (8) und den neuen, gelb-grünen Komplex [Ag(μ-Ph2PNPPh2)2(μ-Ph2PNHPPh2)Ag] · Dioxan (7 · Dioxan), von dem eine Kristallstrukturanalyse angefertigt wurde. Sie zeigt, daß 7 · Dioxan eine Bicyclo[3.3.3]undecan-Struktur besitzt, in der die Silberatome die seltene trigonal-planare Koordination einnehmen. Der (AgAg)-Abstand beträgt 281,6(1) pm und deutet auf eine Wechselwirkung zwischen den Silberatomen hin. Das Dioxan ist über eine Wasserstoffbrückenbindung an die NH-Gruppe des koordinierten HN(PPh2)2 gebunden. Mit ClPPh2 bildet 8 N(PPh2AgCl)3 (12), welches auch durch direkte Reaktion von N(PPh2)3 (3) mit Silber(I)-chlorid erhältlich ist. Alle Verbindungen wurden, soweit möglich, durch IR-, Raman-, 1H-NMR-, 31P{1H}-NMR-, 13C{1H}-NMR- und Massenspektren charakterisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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