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  • Wiley-Blackwell  (115)
  • 1995-1999  (48)
  • 1990-1994  (46)
  • 1980-1984  (21)
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  • 1
    Electronic Resource
    Electronic Resource
    A general framework for the measurement of band broadening properties of GC capillary columns (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 385-392 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Theory of band broadening ; Regression methods in column evaluation abt concept ; Possible aid in assessing coating efficiency ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the approach to the developement of a practical procedure for the evaluation of band broadening properties of gas capillary columns, the expression for the variance of a solute band is cast in a dimensionless form. This expression supplies the basis for a valid bench mark for column evaluation. Experimental results demonstrate the applicability of the method.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040804
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  • 2
    Electronic Resource
    Electronic Resource
    Tailored polymers by cationic ring-opening polymerization (1994)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 223 (1994), S. 1-11 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: After a general classification of the cationic ring-opening polymerizations (CROP's) according to their polymerization mechanism, a number of examples of tailored polymers based on CROP are presented. The monomers used for the synthesis of these tailored structures are tetrahydrofuran (THF), N-tert-butyl aziridine (TBA), 2-methyl-1,3-oxazoline (MeOX) and 1,3-dioxolane (DXL).The polymer structures include different block and graft copolymers, macromonomers, star-shaped polymers, polymer networks and interpenetrating polymer networks (IPNs).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1994.052230101
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  • 3
    Electronic Resource
    Electronic Resource
    Reaktionen an Silicium-Silicium-Bindungen, 2[1] Trichlorsilylierung von tert-Butyldichlorphosphan und tert-Butylbis(trimethylsilyl)phosphan mit Hexachlordisilan: Ein Weg zu neuen bifunktionellen (Trichlorsilyl)phosphanen (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 657-658 
    Details
    ISSN: 0009-2940
    Keywords: Trichlorosilylation ; Chlorophosphanes ; Silylphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Silicon-Silicon Bonds, 2[1]. - Trichlorosilylations of tert-Butyldichlorophosphane and tert-Butylbis(trimethylsilyl)phosphane with Hexachlorodisilane: Synthesis of New Bifunctional (Trichlorosilyl)phosphanesDi-tert-butyl(trimethylsilyl)phosphane (1) and tert-butylbis(trimethylsilyl)phosphane (3) react with one equivalent of hexachlorodisilane with exchange of one trimethylsilyl group by a trichlorosilyl group under mild conditions to give di-tert-butyl(trichlorosilyl)phosphane (2) and tert-butyl(trichlorosilyl)(trimethylsilyl)phosphane (4) in fair yields. tert-Butylbis(trichlorosilyl)phosphane (5) is available from tert-butyldichlorophosphane without organometallic reagents and solvents by simple reductive trichlorosilylation with the help of two equivalents of hexachlorodisilane. 5 is a useful precursor for phosphaalkane synthesis: with pivaloyl chloride, 5 leads to tert-butyl-[tert-butyl(trichlorosilyloxy)methylene]phosphane (6). From 4 with pivaloyl chloride mainly 6 and some known tert-butyl[tert-butyl(trimethylsilyloxy)methylene]phosphane (7) are formed.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250318
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  • 4
    Electronic Resource
    Electronic Resource
    Reactions at Silicon-Silicon Bonds, V. Selective Trichlorosilylation of Alkyl(diorganylamino)chlorophosphanes with Hexachlorodisilane or with Trichlorosilane/Triethylamine. - Two Routes to New Functional Trichlorosilylphosphanes (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 615-619 
    Details
    ISSN: 0009-2940
    Keywords: Reductive silylation ; Aminochlorophosphanes ; Silylphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of alkyl(diorganylamino)chlorophosphanes R(R2′N)PCl 1 (1a: R = tBu, R′ = Et, 1b: R = iPr, R′ = iPr; 1c: R = iPr, R′ = Ph) with hexachlorodisilane, afforded alkyl(diorganylamino)trichlorosilylphosphanes R(R2′N)PSiCl3 2 (2a: R = tBu, R′ = Et; 2b: R = iPr, R′ = iPr; 2c: R = iPr, R′ = Ph) and silicon tetrachloride. An intermediate formed in the reaction of 1b with hexachlorodisilane, the adduct iPr(iPr2N)(Cl)P-Si(Cl)3-SiCl3 (3b = 1b · Si2Cl6), was detected by 31P- and 29Si-NMR spectra that indicate pentacoordinated silicon bound to tetracoordinated phosphorus and tetracoordinated silicon. Trichlorosilylphosphanes 2 are also available from 1 under very mild conditions by reductive trichlorosilylation with trichlorosilane in the presence of triethylamine. Compounds 2 were identified analytically, by mass spectroscopy, multinuclear NMR, and an X-ray structure determination of 2c.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280614
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  • 5
    Electronic Resource
    Electronic Resource
    Reactions of Silicon-Silicon Bonds, VIFor part V, see ref.[1].. Reductive Trichloroslilylation Reactions Leading to Alkyl- and Dialkylaminobis(trichlorosilyl)phosphanesDedicated to Professor Walter Siebert on the occasion of his 60th birthday. (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 377-384 
    Details
    ISSN: 0009-2940
    Keywords: Trichlorosilylation ; Dichlorophosphanes ; Silylphosphanes ; Amino(silyl)phosphanes ; Silicon /Reductions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of hexachlorodisilane and of trichlorosilane/triethylamine with alkyl-and dialkylaminodichlorophosphanes RPCl2 1a-i [R = iPr: a; (Me3Si)2CH: b; R=1-adamantly: c: R=tBu: d; R=Et2N: e; R=iPr2M: f] furnish bis(trichlorosilyl)-phosphanes RP(SiCl3)2 3a-f. However, when less bulky substituents are attached to the phosphorus atom, so that there is little steric crowding, the double reductive silylations leading from 1 to 3 are accompanied by side reactions and decomposition of 3. Therefore, only 3b, 3c, 3d, and 3f wre isolated in a pure state. These compounds are more readily prepared by the; trichlorosilane/triethylamine method. 1H-, 31P- and 29Si-Nmr spectra confirm their constitution. The structure of solid 3f, the first aminobis(trichlorosilyl)phosphane, was determined by X-ray crystallography. 3f contains a phosphorus atom in a pyramidal environment surrounded by two silicon atoms and a planar nitrogen atom of the diisopropylamino group.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300312
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  • 6
    Electronic Resource
    Electronic Resource
    Reversible Rearrangements of Chlorophosphane-Dichlorogermylene Ylides to Trichlorogermylphosphanes  -  Structure Determination of a Tetranuclear Bis(chlorophosphane)bis(trichlorogermylphosphane) Silver Bromide Complex (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1619-1623 
    Details
    ISSN: 0009-2940
    Keywords: Dichlorogermylene ; Trichlorogermylphosphanes ; Insertion ; Silver bromide complex ; Carbene homologues ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chlorophosphanes RR'PCl (1a: R,R' = 1b: R = tBu, R' = iPr, 1c: R = iPr, R' = Et2N, 1d: R = Et2N react with the dichlorogermylene dioxane complex 2 furnishing trichlorogermylphosphanes RR'PGeCl3 4a-d. In the cases of 1c/4c and 1d/4d the insertion reaction remain incomplete; similarly, 4a always contains, shortly after isolation in pure state, small amounts of 1a that can be detected by NMR. A provided by the reaction of trichlorosilylphosphane tBu(Et2N)PSiCl3 (5d) with GeCl4. The alkyl(dialkylamino) trichlorogermylphosphane 4d exists only in an equilibrium with chlorophosphane 1d, which coordinates GeCl2 leading to the dichlorogermylene complex 3d. A 1:1 mixture of 4a with 1a is formed by the novel cleavage (“chlorogermylation”) of the P-P bond of tetraisopropyldiphosphane with germanium tetrachloride. Di-tert-butyl(trichlorogermyl)phosphane 4e (R, R' = tBu) reacts with silver bromide providing a crystalline silver complex 7. A structure determination by X-ray diffraction reveals that 7 is [Ag4Br4(tBu2PCl)2(tBu2PGeCl3)2]. 2C7H8. Two of the Ag atoms of the cubane-like (AgBr)4 core of 7 are coordinated by chlorophosphane 1e, the other two by trichlorogermylphosphane 4e.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301110
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  • 7
    Electronic Resource
    Electronic Resource
    Komplexe von Germanium(II)-chlorid mit 1,2-Bis(diphenylphosphino)ethan: Ein Halb-Chelat und ein Doppel-Ylid (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 3572-3580 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complexes of Germanium Dichloride with 1,2-Bis(diphenylphosphino)ethane: A Semi-Chelate and A Double-Ylide1,2-Bis(diphenylphosphino)ethane (dppe) reacts with the germanium dichloride dioxane complex depending on the stoichiometric ratio to give a 1:2 dppe-bridged bis(germylene) complex (1) or a 1:1 complex (2) that shows equilibration of both phosphorus atoms in 31P-NMR. The crystal structure of 2 has been determined from single crystal X-ray data. The compound crystallizes with 8 units dppe-GeCl2· 1/2 C6H6 in a unit cell of symmetry A 2/a-C2h6 in a monoclinic system. The dppe-GeCl2 molecules contain a novel semi-chelating type of coordination of the dppe ligand [distorted Ψ-trigonal bipyramidal coordination at Ge11 with an exceptionally long distance Ge-P(apical)]. 2 thus represents an intermediate structure between chelate complex and phosphorus ylid.
    Notes: 1,2-Bis(diphenylphosphino)ethan (dppe) reagiert mit dem Germanium(II)-chlorid-Dioxankomplex je nach Mengenverhältnis zu einem dppe-verbrückten Bis(germylen)-Komplex (1) oder zu einem 1:1-Komplex (2), der sich durch die Äquivalenz der Phosphanfunktionen in Lösung (31PNMR) auszeichnet. 2 kristallisiert mit 1/2 C6H6 monoklin mit acht Einheiten der Formal dppe-GeCl2· 1/2 C6H6 in der Elementarzelle, Raumgruppe A 2/a-C2h6. Die verzerrt Ψ-trigonal-bipyramidale Koordination um Ge11 mit ungewöhnlich langem Abstand Ge-p(apikal) weist 2 als Komplex mit halb-chelierendem dppe-Liganden aus (Zwischenstellung zwischen Chelatkomplex und einfachem \documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm P}\limits^{\rm + } - \mathop {{\rm Ge}}\limits^{\rm - } - {\rm Ylid} $\end{document}).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811141110
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  • 8
    Electronic Resource
    Electronic Resource
    Bis[tris(trimethylsilyl)methyl]diselenid: Ein ungewöhnliches Dichalkogenid mit sterisch erzwungener trans-C2h-Konformation (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 2325-2327 
    Details
    ISSN: 0009-2940
    Keywords: Diselenide, torsion angle/NMR, 77Se/Selenenyl halide ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bis[tris(trimethylsilyl)methyl] Diselenide: An Unusual Diselenide with Sterically Enforced trans-C2h ConformationDeselenation of bis[tris(trimethylsilyl)methyl] triselenide (1) with copper occurs with formation of bis[tris(trimethylsilyl)-methyl] diselenide (2) and minor amounts of 3,3,5,5-tetrakis(trimethylsilyl)-1,2,4-triselenolane (3). The structures of 2 and 3 have been studied by multinuclear NMR spectroscopy and by X-ray crystallography. The C—Se—Se—C moiety of 2 adopts an unusual antiperiplanar conformation. Cleavage of the Se — Se bond by iodine providing iodo[tris(trimethylsilyl)-methyl]selane (5) is complete with 2, but reversible with 1.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901231215
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  • 9
    Electronic Resource
    Electronic Resource
    Lithium-(2,4,6-tri-tert-butylphenylselenid); Erzeugung, Struktur und Reaktionen unter Knüpfung von Se -P-, Se - C-, Se - Si-, Se - Sn- und Se - Au-Bindungen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1315-1320 
    Details
    ISSN: 0009-2940
    Keywords: Chalcogen-chalcogen bonds ; Selenium ; Selenide (2,4,6-tri-tert-butylphenyl)- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Properties of Chalcogen-Chalcogen Bonds, XV1). - Lithium 2,4,6-Tri-tert-butylphenylselenide: Synthesis, Structure, and Reactions with Formation of Se - P, Se - C, Se - Si, Se - Sn, and Se - Au BondsBis(2,4,6-tri-tert-butylphenyl)diselenide (1) is reduced by lithium triethylhydridoborate to give lithium 2,4,6-tri-tert-butyl-phenylselenide (2) in high yield. 2 crystallizes with three molecules of tetrahydrofuran coordinated to lithium ([2(THF)3] ≡ 2a, space group P&1macr; Z =4). The monomeric compound 2a contains four-coordinate lithium bonded to two-coordinate selenium. 2 (LiSeR) reacts with the nonmetal and metal halides tBu2PCl, CH2Cl2, Me3SiCl, Me3SnCl, and Ph3PAuCl to give tBu2PSeR (3), RSeCH2Cl (4), (RSe)2CH2 (5), Me3SiSeR (6), Me3SnSeR (7), and the novel gold(I) selenophenolate derivative Ph3PAuSeR (8)(R = 2,4,6-tri-tert-butylphenyl).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240602
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  • 10
    Electronic Resource
    Electronic Resource
    Spaltung sperriger Diarylditelluride mit Brom und Iod[1]; Strukturbestimmung an Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2 (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 761-766 
    Details
    ISSN: 0009-2940
    Keywords: Tellurium compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cleavage of Bulky Diaryl Ditellurides with Bromine and Iodine; Crystal Structure of Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2Bis(2,4,6-triisopropylphenyl) ditelluride (1a), obtained from 2,4,6-triisopropylphenylmagnesium bromide with tellurium followed by oxidation with oxygen, and bis(2,4,6-tri-tert-butylphenyl) ditelluride (1b) react with equimolar amounts of bromine and iodine to provide new monomeric arenetellurenyl halides 2,4,6-R3C6H2TeX (2a, b, 3a, b: R = i-C3H7, t-C4H9; X = Br, I). Both tellurenyl iodides are thermally more stable than the corresponding bromides. Green 2,4,6-(i-C3H7)3C6H2TeI (3a) reacts with Et4N+I- to give the stable, red adduct Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2 (4a). An X-ray crystal structure determination of 4a revealed a T-shaped structure of the hypervalent aryldiiodotellurate(II) anion. Iodide-ion transfer between aryldiiodotellurate(II) and arenetellurenyl iodide is a fast process (1H-NMR time scale). 125Te-NMR data of this anion and of tellurenyl halides are compared with those of the ditellurides and of lithium benzenetellurolates (LiTeR·(THF)x).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250402
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