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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 97 (1964), S. 1502-1510 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umsetzung von wasserfreiem MnCl2 und CoCl2mit Chlornitrat oder Distickstoffpentoxid liefert die entsprechenden Nitrate als N2O4-Addukte, deren vorsichtige thermische Zersetzung die solvatfreien Nitrate Mn(NO3)2 und Co(NO3)2 entstehen läßt. Nach Debye-Scherrer-Aufnahmen sind die Nitrate isotyp. IR-Spektren und magnetische Messungen sprechen für rein ionogen aufgebaute Verbindungen. Dagegen müssen bei dem näher untersuchten Co(NO3)2.N2O4 nach Aussage des IR-Spektrums homöpolare Bindungsanteile diskutiert werden. Die Nitrate zersetzen sich bei 180° unter Abspaltung von NO2 und Sauerstoff, wobei die Oxide MnO1.655 und Co3O4 entstehen.
    Additional Material: 5 Tab.
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  • 2
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Inorganic Polyhedron Compounds, IIIZintl's “Polyanionic Salts”: Preparation and Properties of the Crystalline Compounds [Na4·7en]Sn9, [Na4·5en]Ge9 and [Na3·4en]Sb7 and of their Solutions The Crystal Structure of [Na4·7en]Sn9Alloys of sodium with germanium, tin, lead, antimony, or bismuth when treated with ethylenediamine (en) yield stable solutions of Zintl's so called “polyanionic salts”, from which the crystalline compounds [Na4·7en]Sn9, [Na4·5en]Ge9 and [Na3·4en]Sb7 are obtained. [Na4·7en]Sn9 contains the Sn94- -polyhedron (crystal structure determination) with a geometry between the ideal geometries of the tricapped trigonal prism (D3h) and the antiprism capped on one square (C4v). The compound is strongly diamagnetic (electron delocalisation). The coordinated en may be completely removed under mild conditions from [Na4·7en]Sn9 without a collapse of the polyanionic structure of Na4Sn9. In solution polyhedra of the same composition are found. The compounds are very sensitive against oxygen and water. Apart from these reactions the behaviour of [Na4·7en]Sn9 against the alkali metals, alkoxides, [(C6H5)4X]Cl (X=P, As), bipy, Nabipy, and Na2 bipy is investigated.
    Notes: Durch Behandlung von Legierungen des Natriums mit Germanium, Zinn, Blei, Antimon oder Wismut mit äthylendiamin (en) erhält man stabile (Lösungen der von Zintl als polyanionige Salze bezeichneten Verbindungen. [Na4·7 en]Sn9, [Na4·5 en]Ge9 und [Na3·4en]Sb7 werden kristallin dargestellt. Nach der Röntgenstrukturbestimmung von [Na4·7en]Sn9 liegt ein Sn94- -Polyeder vor, dessen Geometrie zwischen den Idealformen eines trigonalen Prismas mit seitlich aufgesetzten Pyramiden (D3h) und dem quadratischen Antiprisma mit aufgesetzter Pyramide (C4v) liegt. Die Verbindung ist stark diamagnetisch (delokalisiertes Elektronensystem). Bei vorsichtigem Entfernen von en bleibt die polyanionische Struktur Na4Sn9 bestehen. In Lösungen liegen Polyeder der gleichen Zusammensetzung vor. Die Verbindungen sind sehr empfindlich gegenüber Sauerstoff und Wasser. Neben diesen Reaktionen wird das Verhalten von [Na4·7en]Sn9 gegenüber Alkalimetallen, Alkoxiden, [(C6H5)4X]Cl (X = P, As), bipy, Nabipy und Na2 bipy untersucht.
    Additional Material: 3 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 2067-2076 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Properties and Structure of Phosphinato Complexes of RheniumThe solvent adducts [R2PO2Re(CO)3L]n (1a, b) [R = CH3 (a); C6H5 (b)] are obtained by photolysis of R2PO2H with [Re(CO)5]2 in THF or 1,4-dioxane. Whereas substitution of L by CO forms the dimeric complexes [R2PO2Re(CO)4]2 (2a, b), elimination of L yields the tricarbonyl compounds [R2PO2Re(CO)3]n (3a, b). 2b and 3b between which exists a reversible equilibrium are also obtained by the reaction of BrRe(CO)5 with (C6H5)2PO2Ag. 2b crystallizes triclinic in the space group P¯1 with Z = 2. The IR and Raman spectra are discussed, the 31P NMR data reported.
    Notes: Durch Photolyse von R2PO2H mit [Re(CO)5]2 in THF oder 1.4-Dioxan erhält man die Solvens-Addukte [R2PO2Re(CO)3L]n (1a, b) [R = CH3 (a); C6H5 (b)]. Während der Austausch von L durch CO zu den dimeren Komplexen [R2PO2Re(CO)4]2 (2a, b) führt. bilden sich bei der Abspaltung von L die Tricarbonyl-Verbindungen [R2PO2Re(CO)3]n (3a, b). Zu 2b und 3b, zwischen denen ein reversibles Gleichgewicht besteht, gelangt man auch bei der Einwirkung von BrRe(CO)5 auf (C6H5)2PO2Ag. 2b kristallisiert triklin in der Raumgruppe P¯1 mit Z = 2. Die IR- und Raman-Spektren werden diskutiert, die 31P-NMR-Daten mitgeteilt.
    Additional Material: 2 Ill.
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  • 4
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Crystal Structure of the First Quinoid Dihydropterinmolybdenum (IV) ComplexThe first molybdenum(IV) complex with a quinoid dihydropterin, i.e. 2, was isolated and characterized by IR, UV and NMR data and single-crystal X-ray diffraction. The reaction of MoVIO2Cl2 with the biologically important 6β-5,6,7,8-tetrahydro-L-biopterin(2) (7) in MeOH gave almost quantitatively trichloro(1,5-quinoid-7,8-dihydro-6H-L-biopterin)oxomolybdenLim(IV) (2). The complex crystallizes with one molecule of MeOH in the noncentrosymmetric orthorhombic space group P212121 (No. 19) with unit cell dimensions a = 1009.3(3), b = 1104.7(3), and c = 1484.5(4) pm and Z = 4. The Mo-atom has a distorted octahedral geometry (Fig.1). It is coordinated by N(5) and O(4) of the pterin ligand. The distance of the Mo-N(5) bond (202 pm) is unusually short compared to similar complexes. O(4) is located trans to a terminal oxo ligand. The octahedral coordination is completed by three Cl-atoms in a meridional arrangement. Complex 2, with the Mo-atom in the enzyme-relevant oxidation state +IV and the pterin in the intermediate quinoid dihydro form, should lead to an extension of the proposed ‘common molybdenum cofactor’ model.
    Additional Material: 3 Ill.
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  • 5
    ISSN: 0009-2940
    Keywords: Lithium dicyanomethanide ; Sodium dicyanomethanide ; Dicyanomethanides, lithium, sodium, tetrabutylammonium salts ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Crystal Structures of {Li3(12-crown-4)2[HC(CN)2]3}, {Na(15-crown-5)[HC(CN)2]}, and {NaN(nBu)4[HC(CN)2]2 · THF}The preparation and the crystal structures of the title compounds 1 - 3 are described. 1 forms a polymeric chain structure, in which one of the lithium ions is linked by Li…NCC(H)CN… bridges. The remaining lithium ions form (12-crown-4)Li[NCC(H)CN] units, which are coordinated by one of the nitrogen atoms of the dicyanomethanide ions with the lithium ions of the chain. 2 forms an ion pair, in which the sodium ion is coordinated by the five oxygen atoms of the crown ether molecule and by one nitrogen atom of the dicyanomethanide ion. 3 has a threedimensional network, in which the sodium ions are coordinated in a distorted tetrahedral manner by the nitrogen atoms of the dicyanomethanide ions. In the cavities of the network the tetrabutylammonium ions and the THF molecules are found.
    Additional Material: 3 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2161-2164 
    ISSN: 0009-2940
    Keywords: Gold(I) 2,4,6-tri(isopropyl)thiophenolate, hexamer ; Aurate(I), bis[2,4,6-tri(isopropyl)thiophenolato] ammonium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thiolato Complexes of Monovalent Gold. Synthesis and Structure of [(2,4,6-iPr3C6H2S)Au]6 and (NH4)[(2,4,6-iPr3C6H2S)2Au]Reaction of Au(CO)Cl with 2,4,6-tri(isopropyl)thiophenol affords hexameric gold(I) thiolate [(2,4,6-iPr3C6H2S)Au]6 (1). According to an X-ray analysis 1 forms a centrosymmetrical twelve-membered Au - S ring in the chair conformation with the linearly coordinated Au atoms at the mid-edges and the S atoms at the corners of the heterocycle. When the reaction of 2,4,6-tri(isopropyl)thiophenol is carried out with AuI in liquid ammonia the thiolato complex [(2,4,6-iPr3C6H2S)2Au]- -NH+4 (2) is obtained. It crystallizes as NH4 · 2 · 3 NH3. The gold atom in 2 is linearly coordinated by two thiolato S atoms. The ammonium cation forms hydrogen bonds with three NH3 solvate molecules.
    Additional Material: 2 Ill.
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  • 7
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Tetrapyrrole Ligands, LI1). - Synthesis, Spectroscopic Properties, and Structure of new Heterodimetal Bis-(octaethylporphyrinates)Hydrogenbis(octaethylporphyrinato)praseodymium(III), PrH-(OEP)2 (3a), reacts in a basic medium with thallium(I) ethanolate and mercury(II) trifluoroacetate to give the heterodimetallic bis-porphyrinates, thallium(I) bis(octaethylporphyrinato)praseodymate(III), TlPr(OEP)2 (4a), and (trifluoroacetato)mercury(II)bis(octaethylporphyrinato)praseodymate(III), (TFA)HgPr(OEP)2 (5a), respectively. Their constitution is proved by electronic absorption, IR, and 1H-NMR spectra. X-ray crystallography of 4a shows the Tl1 ion to lie in the apex of a square pyramid of nitrogen atoms belonging to one of the porphyrin rings of the [Pr(OEP)2]-ion and the PrIII ion within a square antiprism of the eight N atoms of the two porphyrin rings.
    Notes: Hydrogenbis(octaethylporphyrinato)praseodym(III), PrH(OEP)2 (3a), reagiert in basischem Medium mit Thallium(I)-ethanolat bzw. Quecksilber(II)-trifluoracetat zu den Heterodimetall-Bisporphyrinaten Thallium(I)-bis(octaethylporphyrinato)praseodymat-(III), TlPr(OEP)2 (4a) bzw. (Trifluoracetato)quecksilber(II)-bis(octaethylporphyrinato)praseodymat(III), (TFA)HgPr(OEP)2(5a). Die Konstitution der Produkte wird durch Elektronenanregungs-, IR- und 1H-NMR-Spektren belegt. Nach der Kristallstrukturanalyse von 4a bildet das Tl1-Ion die Spitze einer quadratischen Pyramide mit den vier N-Atomen eines Porphyrinrings des [Pr(OEP)2]-Ions, in dem das PrIII-Ion quadratisch-antiprismatisch von den acht N-Atomen der Porphyrinringe umgeben ist.
    Additional Material: 4 Ill.
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  • 8
    ISSN: 0009-2940
    Keywords: Bis-arene complexes ; Niobium complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bis(mesitylen)niobium(0), Nbmes2, prepared via the NbCl5/Al/AlCl3/mes system by exaustive reduction in the presence of 1,2-dimethoxyethane or tetrahydrofuran as previously reported, has been studied by X-ray diffraction methods. The sandwich molecule has parallel, substantially planar, aromatic rings, in an eclipsed conformation. Nbmes2 is oxidized to Nbmes2X by reaction with 1,1-dimethyl-4,4′-bipyridinium halides [methylviologen halides, mvX2 (X = Cl, I)]. The reaction of both halo compounds with CO yielded the niobium(I) derivatives [Nbmes2(CO)] [Nb2(μ-X)3(CO)8]. In the case of X = I an IR study at low temperature has shown the presence of intermediate carbonyl compounds, presumably Nbmes2I(CO) and [Nbmes2(CO)]+. The ionic iodide derivative was shown by X-ray diffraction methods to consist of discrete [Nbmes2(CO)]+ cations and [Nb2(μ-I)3(CO)8]- anions. The two mesitylene groups in the cation are bent and in an eclipsed conformation.
    Additional Material: 6 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1597-1605 
    ISSN: 0009-2940
    Keywords: Polymers, low-gap ; Polyarenemethines ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of suitable precursors of polyarenemethines (PAM) 1, which are predicted to be potential low gap polymers, is described. The Knoevenagel condensation of heteroaromatic aldehydes with 2,5-dihydrothiophene 1,1-dioxide (5), 2,5-dihydrothiophene 1-oxide (9), and its benzo-annulated analogs [6 and [10] yields the methine-bridged compounds 7, [8], 11, and [12], respectively. Reduction of the methine-bridged sulfoxides 11 and [12] leads to the corresponding sulfides 13 and [14]. For compound 18 with a high sterical demand another route has been developed. Thus, the reaction of the dicarbinol 17 with HI yields directly the heteroaromatic quinodimethane 18. The molecular structures of 7a and 18 are determined by X-ray analysis.
    Additional Material: 3 Ill.
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  • 10
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (1,2-Naphthalocyaninato)iron(II) Compounds with Isocyanides as Axial Ligands; Crystal Structure of an Isomer of Bis(cyclohexylisocyanide)(naphthalocyaninato)iron(II)(1,2-Naphthalocyaninato)iron(II) (1,2-NcFe) (1) is prepared by the reaction of 1,2-dicyanonaphthalene with pentacarbonyliron. The monomeric bisaxial isocyanide complexes 1,2-NcFeL2 (2-4) with L = t-BuNC, c-HxNC, and bzNC as well as the bridged complex [1,2-NcFe(dib)]n (5) (dib = 1,4-diisocyanobenzene) are formed as stable compounds by treating 1 with the neat ligands L. The isocyanide complexes are characterized by spectroscopic and thermogravimetric methods. The synthesis of 1 affords a mixture of isomers as shown by the NMR spectra of 1,2-NcFe(c-HxNC)2 (3). One of these structural isomers of 3 is separated by column chromatography. The crystal structure analysis carried out for the first time on a 1,2-naphthalocyanine derivative shows it to be the symmetrical isomer 3a. [1,2-NcFe(dib)]n (5) exhibits only poorly semiconducting properties as compared to [2,3-NcFe(dib)]n. However, compound 5 can be doped with iodine, and the product formed, [1,2-NcFe(dib)]I1.8n, shows a powder conductivity σRT = 4 × 10-3 S/cm.
    Notes: (1,2-Naphthalocyaninato)eisen(II) (1,2-NcFe) (1) wird aus 1,2-Dicyannaphthalin durch Umsetzung mit Pentacarbonyleisen erhalten. Die monomeren bisaxialen Isocyanidkomplexe 1,2-NcFeL2 (2-4) mit L = t-BuNC, c-HxNC und bzNC sowie der überbrückte Komplex [1,2-NcFe(dib)]n (5) (dib = 1,4-Diisocyanbenzol) entstehen als stabile Verbindungen durch direkte Umsetzung von 1 mit den entsprechenden Liganden L. Die Isocyanidkomplexe werden durch spektroskopische und thermogravimetrische Methoden charakterisiert. Die NMR-Spektren von 1,2-NcFe-(c-HxNC)2 (3) zeigen, daß bei der Synthese von 1 ein Isomerengemisch entsteht. Eines der möglichen Strukturisomeren von 3 wird durch Säulenchromatographie abgetrennt. Die erstmalig an einem 1,2-Naphthalocyaninderivat durchgeführte Kristallstrukturanalyse ergibt, daß es sich um das symmetrische Isomere 3a handelt. Im Gegensatz zu [2,3-NcFe(dib)]n ist [1,2-NcFe(dib)]n (5) nur ein schlechter Halbleiter; läßt sich jedoch mit Iod oxidativ zu [1,2-NcFe(dib)I1.8]n dotieren, das eine Pulverleitfähigkeit σRT = 4 × 10-3 S/cm zeigt.
    Additional Material: 4 Ill.
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