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  • Inorganic Chemistry  (83,671)
  • 1
    Electronic Resource
    Electronic Resource
    -Brückenbindung bei Dipyridinium-octafluoro-di-μ-oxo-diarsenat, (C5H6N)2As2F8O2; Kristall- und Molekülstruktur (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 734-744 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: -Hydrogen Bonding by Dipridinium Octafluoro-di-μ-oxo-diarsenate, (C5H6N)2As2F8O2; Crystal and Molecular StructureThe dimeric anion (As2F8O2)2- is coupled to the pyridinium cation by a hydrogen bond, . The distance NäO and the wave number of the N-H(O)-stretching vibration are 2.86 Å and 3240 cm-1, respectively. The results of threedimensional X-ray structure analysis are given.
    Notes: Das dimere Anion (As2F8O2)2- ist mit dem Pyridinium-Kation über eine Wasserstoffbrücke verknüpft. Der Abstand NäO beträgt 2.86 Å. die Wellenzahl der νN-H(O)-Schwingung liegt bei 3240 cm-1. Die Ergebnisse der dreidimensionalen Röntgenstruktur-analyse werden dargelegt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060303
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  • 2
    Electronic Resource
    Electronic Resource
    1, 3, 4-Thiadiazole-2, 5-dithiol as a Complexing Agent II. Complexes of NiII, RhI, PdII, PtII, AuIII, and CuII (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 415 (1975), S. 84-96 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1, 3, 4-Thiadiazol-2, 5-Dithiol als Komplexierungsreagenz. II. Komplexe des NiII, RhI, PdII, PtII, AuIII und CuIIComplexes of NiII, RhI, PdII, PtII, AuIII, and CuII with 1, 3, 4-thiadiazole-2, 5- dithiol have been prepared. Probable structures have been proposed for the complexes on the basis of chemical analysis, magnetic susceptibility and spectral data. Crystal field parameters have been calculated which are in keeping with the structures proposed.
    Notes: Komplexe des NiII, RhI, PdII, PtII, AuIII und CuII mit 1, 3, 4-Thiadiazol-2, 5-dithiol wurden dargestellt. Auf Grund analytischer, magnetischer und spektraler Daten werden Strukturen vorgeschlagen. Kristallfeld-Parameter wurden in Übereinstimmung mit den vorgeschlagenen Strukturen berechnet.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754150112
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  • 3
    Electronic Resource
    Electronic Resource
    (1,1′,3,3′-Tetra-tert-butyl-5,5′-pentafulvalen) dithallium - Synthese und Kristallstruktur: Ein Beitrag zur Diskussion von nichtklassischen Thallium-Thallium-Wechselwirkungen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1693-1697 
    Details
    ISSN: 0009-2940
    Keywords: Nonclassical T1(I)-T1(I) interactions ; Thallium, fulvalene complex ; (Cyclopentadienyl)thallium complex ; 5,5′;-Pentafulvalene, 1,1′;,3,3′;-tetra-tert-butyl-dithallium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: (1,1′,3,3′-Tetra-tert-butyl-5,5′-pentafulvalene)dithallium - Synthesis and Crystal Structure: a Contribution to the Discussion of Nonclassical TI(I)-TI(I) InteractionsReaction of 1,1′,3,3′-tetra-tert-butyl-5,5′-dihydropentafulvalenediyldilithium with stoichiometric amounts of thallium chloride affords the dinuclear complex (η5:(η5-tBu4C10H4)Tl2 (2). Compound 2 is air-and moisture-sensitive, and photolabile. It crystallizes in the space group P•1 and consists of two (cyclopentadienyl)thallium units which are connected by a central C-C bond and twisted against each other by 70°. The monomeric units of 2 form a two-dimensional polymer with a zick-zack chain of T1 atoms and a periphery of substituted cyclopentadienyl ligands. Rather short T1-T1 contacts of 3.760 and 3.998 Å are formed within a dimeric substructure. The geometry of the cyclopentadienyl ligands around the shortest T1-T1 bond is similar to that predicted by the theory for weak T1-T1 interactions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240804
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  • 4
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    Electronic Resource
    1,1′-Bis(diphenylphosphino)bicyclopropyl: Synthesis, Properties, Precursors, Derivatives, and Metal Complexes (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 423-431 
    Details
    ISSN: 0009-2940
    Keywords: Bicyclopropyl / Diphosphines, chelating ligands / Rhodium complexes / Gold complexes / Phosphine sulfides / Phosphine-boranes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compound 4 has been prepared from readily available 2,3-bis(diphenylphosphinyl)-1,3-butadiene (1) through double cyclopropanation using Me2S(CH2)O to give 1,1′-bis(diphenylphosphinyl)bicyclopropyl (2), followed by reduction using HSiCl3/NEt3. Addition of sulfur to compound 4 yields the disulfide 5, and reaction with tetrahydrofuran - borane affords the 1:2 adduct with BH3 (6). Quaternization reactions with MeI or CH2I2 give the double quaternary salts 7 and 8, respectively. Single dehydrohalogenation employing nBuLi converts 8 into the cyclic semiylide salt 9. 4 is an excellent ligand for lowvalent late transition-metal cations. With PdI2 the 1:1 complex LPdI2 (10, with L = 4), and with [(CO)2RhCl]2 the ionic 2:1 complex L2Rh+Cl- (11) are obtained. Experiments with (CO)AuCl yield the 1:2 complex L(AuCl)2 (12), X-ray structure analyses were performed with single crystals of the disulfide 5, as well as the rhodium(I) and gold(I) complexes 11 and 12. 5 has a conformation between s-cis and s-trans with the PS functions pointing away from each other at opposite ends of the molecule. By contrast, in the gold(I) complex the ligand approaches an s-cis conformation, and through rotations about P-C and C-C bonds - as referred to the conformation of 5 - the metal atoms are brought into close contact: Au…Au = 3.085 Å. Through temperature-dependent NMR investigations of compounds 5 and 12, and by comparison with values calculated or experimentally determined for related bicyclopropyl compounds (available in the literature), the energy of the Au…Au attraction has been estimated to be ca. 6 kcal/mol. Compound 11 features a square-planar, double-chelate cation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230303
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  • 5
    Electronic Resource
    Electronic Resource
    1,1′-Bis(methylphenylphosphanyl)ferrocene: Synthesis and Complexes with the Tetracarbonylchromium Fragment (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 689-693 
    Details
    ISSN: 0009-2940
    Keywords: Ferrocene, 1,1′-bis(methylphenylphosphanyl)- ; Chromium, carbonyl-, phosphane derivatives ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,1′-Bis(methylphenylphosphanyl)ferrocene (mppf) (2) was synthesized from dilithioferrocene and PMePh(OC6H4-4-Me). The diastereomers rac-2 and meso-2 were separated by fractional crystallization from ethanol. The tetracarbonyl-chromium complexes (rac-2)Cr(CO)4 (rac-5) and (meso-2)Cr(CO)4 (meso-5) were obtained photochemically from hexacarbonylchromium and mppf in near quantitative yield. The structures of rac-2, rac-5, and meso-5 were determined by X-ray crystallographic analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280706
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  • 6
    Electronic Resource
    Electronic Resource
    1,1′-Disubstituierte Titanocen-dithiolen-Chelate des Typs (η5-Me3EC5H4)2Ti(S2C2R2) (E = C, Si, Ge) (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1805-1811 
    Details
    ISSN: 0044-2313
    Keywords: Dithiolene chelates ; titanocene complexes ; η5-trimethylelementcyclopentadienyl complexes ; temperature-dependent 1H NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1′-Disubstituted Titanocene Dithiolene Chelates of Type (η5-Me3EC5H4)2Ti(S2C2R2) (E = C, Si, Ge)Reaction of the titanocene dichlorides (η5-Me3EC5H4)2TiCl2 (E = C, 1a; E = Si, 1b; E = Ge, 1c) with the 1,2-dithiolates (NaS)2C2H2, (NaS)2C2(CN)2 or (LiS)2C6H3Me-4 gave the new titanocene dithiolene chelates (η5-Me3EC5H4)2Ti(S2C2H2) (2a-c), (η5-Me3EC5H4)2Ti[S2C2(CN)2] (3a-c) and (η5-Me3EC5H4)2Ti(S2C6H3Me-4) (4a-c). These have been characterized by 1H NMR, IR, and mass spectroscopy, and have been compared with the unsubstituted η5-C5H5 analogues 2d, 3d and 4d. Activation energies for the chelate ring inversion in solution of 2a-c, 3a-d and 4a-c have been estimated by temperature-dependent 1H NMR spectroscopy.
    Notes: Die Reaktion der Titanocen-dichloride (η5-Me3EC5H4)2TiCl2 (E = C, 1a; E = Si, 1b; E = Ge, 1c) mit den 1,2-Dithiolaten (NaS)2C2H2, (NaS)2C2(CN)2 oder (LiS)2C6H3Me-4 ergab die neuen Titanocen-dithiolen-Chelate (η5Me3EC5H4)2Ti(S2C2H2) (2a-c), (η5-Me3EC5H4)2Ti[S2C2(CN)2] (3a-c) und (η5-Me3EC5H4)2Ti(S2C6H3Me-4) (4a-c). Sie wurden durch 1H-NMR-, IR- und Massen-Spektroskopie charakterisiert und mit den unsubstituierten η5-C5H5-Analoga 2d, 3d und 4d verglichen. Für 2a-c, 3a-d und 4a-c wurden die Aktivierungs-energien der Chelatringinversion in Lösung aus temperatur-abhängig aufgenommenen 1H-NMR-Spektren abgeschätzt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946201024
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  • 7
    Electronic Resource
    Electronic Resource
    1,1′-Ferrocendichalkogenato-Derivate des Oktachlor-cyclotetraphosphazensProfessor Günter Schmid zum 60. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 545-553 
    Details
    ISSN: 0044-2313
    Keywords: Cyclotetraphosphazenes ; [3]ferrocenophanes ; NMR spectra ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1′-Ferrocene Dichalcogenato Derivatives of Octachloro-cyclotetraphosphazeneMononuclear 1,1′-ferrocenedichalcogenato derivatives of octachloro-cyclotetraphosphazene, fcE2[P4N4Cl6] (E = O (12), S (13), Se (14), have been prepared and characterized by 1H, 13C and 31P NMR spectroscopy as well as mass spectrometry.1) The molecular structures of 12--14 were determined by X-ray crystallography. While the 11′-ferrocene diolato complex, fcO2[P4N4Cl6] (12), possesses a 1,3-transannular bridged structure, the dithiolato and diselenolato analogues, 13 and 14, are spiro compounds containing 1,3-dichalcogena-2-phospha-[3]ferrocenophane rings. According to their temperature-dependent NMR spectra, 13 and 14 are nonrigid molecules above room temperature in solution.
    Notes: Es wurden einkernige 1,1′-Ferrocendichalkogenato-Derivate des Oktachlor-cyclotetraphosphazens, fcE2[P4N4Cl6] (E = O (12), S (13), Se (14), dargestellt und mit Hilfe der 1H-, 13C- und 31P-NMR-Spektroskopie sowie der Massenspektrometrie charakterisiert.1) Die Molekülstrukturen von 12-14 wurden durch Röntgenstrukturanalysen bestimmt. Während der 1,1′-Ferrocendiolato-Komplex, fcO2[P4N4Cl6] (12), eine 1,3-transannular verbrückte Struktur besitzt, sind die Dithiolato- und Diselenolato-Analoga, 13 und 14, Spiroverbindungen mit l,3-Dichalkogena-2-phos pha-[3]ferrocenophan-Ringen. Entsprechend den temperaturabhängigen NMR-Spektren sind 13 und 14 oberhalb Raumtemperatur in Lösung nichtstarre Moleküle.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230185
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  • 8
    Electronic Resource
    Electronic Resource
    1,1,2,2-Tetramethyl-1,2-disila-4-cyclohexen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3595-3600 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1,2,2-Tetramethyl-1,2-disila-4-cyclohexeneThe cyclization of cis-1,4-dibromo-2-butene (1) with 1,2-dichloro-1,1,2,2-tetramethyldisilane (2) leads to 1,1,2,2-tetramethyl- 1,2-disila-4-cyclohexene (3). 3 can be easily hydrogenated to 1,1,2,2-tetramethyl-1,2-disilacyclohexane (4) and oxidized with oxygen to 2,2,7,7-tetramethyl-1-oxa-2,7-disila-4-cycloheptene (5).  -  Treatment of 3 with acetic-, propionic-, and formic acid leads to ring opening and formation of 1,1,2,2-tetramethyl-1,2-disila-5-hexenyl acetate (7), propionate (8), and formiate (9). 3 reacts with 2,3-dichloro-5,6-dicyano-P-benzoquinone to yield 2,3-dichloro-4a,8a-dicyano-4a,5,8,8a-tetrahydro-1,4-naphthoquinone (10). Diels-Alder reaction of 3 with tetraphenylcyclopentadienone (11) results in decarbonylation, dehydrogenation and formation of 2,2,3,3-tetramethyl-5,6,7,8-tetraphenyl-1,2,3,4-tetrahydro-2,3-disilanaphthalene (14).
    Notes: Die Cyclisierung von cis-1,4-Dibrom-2-buten (1) mit 1,2-Dichlor-1, 1, 2, 2-tetramethyldisilan (2) führt zu 1, 1, 2, 2-Tetramethyl-1,2-disila-4-cyclohexen (3). 3 kann katalytisch leicht zu 1,1,2,2-Tetramethyl-1,2-disilacyclohexan (4) hydriert und mit Sauerstoff zu 2,2,7,7-Tetramethyl-1 -oxa-2,7-disila-4-cyclohepten (5) oxidiert werden.  -  Bei Einwirkung von Essig-, Propion- und Ameisensäure auf 3 werden unter Ringöffnung 1,1,2,2-Tetramethyl-1,2-disila-5-hexenyl-acetat (7), -propionat (8) und -formiat (9) gebildet.  -  Mit 2,3-Dichlor-5,6-dicyan-p-benzochinon bildet 3 2,3-Dichlor-4a,8a-dicyan-4a,5,8,8a-tetrahydro-1,4-naphthochinon (10). Durch Diels-Alder-Reaktion wird 3 mit Tetraphenylcyclopentadienon (11) unter Decarbonylierung und Dehydrierung in 2,2,3,3-Tetramethyl-5,6,7,8-tetraphenyl-1,2,3,4-tetrahydro-2,3-disilanaphthalin (14) übergeführt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061117
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  • 9
    Electronic Resource
    Electronic Resource
    1,1,3,3-Tetraalkoxy-2-azaallylium-Salze: Darstellung und stereochemische Eigenschaften (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 2487-2492 
    Details
    ISSN: 0009-2940
    Keywords: 2-Azapropenylium salts ; 2-Azaallenium salts ; 2-Azaallylium salts ; Carbamates, N-(dialkoxymethylene) ; Calculations, ab initio ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,1,3,3-Tetraalkoxy-2-azaallylium Salts: Synthesis and Stereochemical Properties The title salts 1 were synthesized in satisfactory yield by regioselective alkylation at the carboxyl oxygen atom of N-(dialkoxymethylene)carbamates 7 with oxonium salts 8. According to IR, 1H- and 13C-NMR spectra, in solution a bent 2-azaallyl cation structure is strongly favored over a linear cumulenic form. Dynamic NMR spectra indicate a barrier of ca. 11.7 kcal/mol between these two valence isomers. - Quantum mechanical calculations (ab initio 3-21G optimizations) on the model compound 1,1,3,3-tetrahydroxy-2-azaallylium (9) confirm the 2-azaallyl structure as the global minimum on the energy hyperface. 2-Azaallenium structures are calculated to be ca. 20 kcal/mol higher in energy. The conformations of the hydroxy groups depend on the C - N - C bond angle. The best isomeric N-protonated N-(dialkoxymethylene)carbamate 10a is predicted to be favored by ca. 3 kcal/mol over the energy lowest 2-azaallylium structure 9a.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921251122
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  • 10
    Electronic Resource
    Electronic Resource
    1,1,3,3-Tetrachlordisilazan169. Mitteilung zur Chemie der Silicium - Stickstoff-Verbindungen. 168. Mitt.: H. P. Baldus, W. Schnick, U. Wannagat, G. Bogedain. SiPN3 Chem. Mater. 5 (1993) 845 (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 239-248 
    Details
    ISSN: 0044-2313
    Keywords: 1,1,3,3-tetrachlorodisilazane ; silicon coordination compounds ; IR-spectra ; Raman spectra ; NMR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1,3,3-TetrachlorodisilazaneThe new compound 1 can be prepared by the reaction of calciumoctamminedichloride, CaCl2(NH3)8, with trichlorosilane, HSiCl3. IR, Raman, 1H and 29Si NMR spectra show a planar Si2NH framework, probably C2-symmetry of the whole molecule and a symmetrical distribution of the four chlorine atoms.In 1 we have got a compound with Bronsted and Lewis acidity, which reacts with three equivalents of pyridine to HSiCl2(py)2—NH(py)—HSiCl2. This addition compound exhibits a fourfold and a sixfold coordinated silicon atom as is shown by a 29Si-solid-NMR spectrum. By thermal decomposition of 1 the new compound 1,3,5-trichloro-2,4,6-tris(dichlorosilyl)-cyclo-1,3,5-trisil-2,4,6-triazane, Si6Cl9H6N3, 4, is formed. With piperidine, 1 reacts by substitution of all four chlorine atoms to compound 5, whereas with diazomethane the NH-functionality is converted to a NCH3 group in 6. Attempts of lithiation lead mainly to a substitution of the chlorine atoms by alkyl groups
    Notes: Durch Umsetzung von Calciumoktammindichlorid, CaCl2(NH3)8, mit Trichlorsilan, HSiCl3, kann die bisher unbekannte Verbindung 1,1,3,3-Tetrachlordisilazan, 1, Si2Cl4H3N, erhalten werden. IR-, Raman-, 1H- und 29Si-NMR-Spektren lassen auf ein planares Si2NH-Gerüst, wahrscheinlich C2-Molekülsymmetrie und symmetrische Verteilung der vier Chloratome schließen.1 zeigt sowohl Brönsted- als auch Lewis-Acidität und reagiert mit drei Äquivalenten Pyridin zu HSiCl2(py)2—NH(py)—HSiCl2, mit laut 29Si-Festkörper-NMR-Spektrum einem sechsfach und einem vierfach koordinierten Si-Atom.Die thermische Zersetzung von 1 führt u. a. zum bisher unbekannten 1,3,5-Trichlor-2,4,6-tris(dichlorsilyl)-cyclo-1,3,5-trisil-2,4,6-triazan, Si6Cl9H6N3, 4. Mit Piperidin reagiert 1 unter Substitution der vier Cl-Atome zu Verbindung 5, mit Diazomethan unter Überführung der NH in eine NCH3-Gruppe zu 6. Lithiierungsversuche von 1 führen bevorzugt zur Cl-Substitution durch Alkylgruppen.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210213
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