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  • 1
    Electronic Resource
    Electronic Resource
    Organoruthenaborane Chemistry. VIII. Reactions of [{(η6-C6Me6)RuCl2}2] and [{(η6-MeC6H4lPr)RuCl2}2] with Cs[arachno-6-SB9H12]: Isolation of ten-, eleven-, and twelve-vertex ruthenathiaboranes and their characterization by N.M.R. spectroscopy (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 602 (1991), S. 17-29 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organoruthenaboran Chemie. VIII. Die Reaktionen von [{(η6-C6Me6)RuCl2}2] und [{(η6-MeC6H4Pr)RuCl2}2] mit Cs[arachno-6-SB9H12]: Isolierung von zehn-, elf- und zwölfeckigen Ruthenathiaboranen und ihre Charakterisierung durch NMR-SpektroskopieDie Reaktion von [{(η6-C6H6)RuCl2}2] mit arachno-[6-SB9H12]- und NaH in CH2Cl2/Aceton-Lösung ergibt in niedriger Ausbeute (1,3%) ein closo-zehneckiges Ruthenathiaboran, [2-(η6-C6Me6)-closo-2, 1-RuSB8H8], während die Reaktion des p-Cymolanalogon [{(η6-MeC6H4Pr)RuCl2}2] mit arachno-[6-SB9H12]- und N,N,N′,N′ Tetramethylnaphthalin-1,8-diamin(tmnd) in Aceton nido-elfeckige und closo-zwölfeckige Ruthenathiaborane folgender Formulierungen [11-Cl-7-(η6MeC6H4Pr)-nido-7, 8-RuSB9H10] (2,2%), [2,3-(η6-MeC6H4Pr)2 -closo-2,3,1-Ru2SB9H9] (21%), und [7-Cl-2, 3-(η6MeC6H4Pr)2-closo -2,3,1-Ru2SB9H8] (8%) ergibt. Die Produkte sind alle luftstabile, rote oder gelbe Festkörper und werden durch kernmagnetische Doppelresonanz und 2D-Korrelations-NMR-Spektroskopie (COSY) charakterisiert.
    Notes: Reaction of [{(η6-C6H6)RuCl2}2] with arachno-[6-SB9H12]- and NaH in CH2Cl2/acetone solution gives a low yield (1.3%) of a closo ten-vertex ruthenathiaborane formulated as [2-(η6-C6Me6)-closo-2,1-RuSB8 H8] whereas reaction of the p-cymene analogue [{(η6-MeC6H4Pr)RuCl2}2] with arachno-[6-SB9H12]- and N,N,N′,N′-tetramethylnaphalene-1,8-diamine (tmnd) in acetone yields nido-eleven-vertex and closo-twelve-vertex ruthenathiaboranes of proposed formulations [11-Cl-7-(η6MeC6H4Pr)-nido-7, 8-RuSB9H10] (2.2%), [2,3-(η6-MeC6H4Pr)2- closo-2,3,1-Ru2SB9H9] (21%), and [7-Cl-2,3-(η6-MeC6H4Pr)2 -closo-2,3,1-Ru2SB9H8] (8%). The products are all air-stable red or yellow solids and their characterization made use of nuclear magnetic double resonance and twodimensional correlation n.m.r. spectroscopy (COSY).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916020103
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  • 2
    Electronic Resource
    Electronic Resource
    Organoruthenaborane Chemistry. X. The SM2-catalysed formation of [ l-(η6-C6Me6)-isocloso-RuB9H9], and some B-phenylamino derivatives. NMR and X-ray diffraction studiesDedicated to Professor Rudolf Hoppe on his 70th Birthday (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 616 (1992), S. 79-85 
    Details
    ISSN: 0044-2313
    Keywords: Organoruthenaboranes ; ruthenium ; boranes ; n.m.r. spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organoruthenaboran-Chemie. X. Die SMe2-katalysierte Bildung von [1-(η6-C6Me6)-isocloso-RuB9H9] und einige B-Phenylamino-Derivate. NMR- und Röntgen-UntersuchungenDie Einwirkung von SMe2, auf das zehneckige nido-Ruthenaboran [1-(η6-C6Me6)RuB9H13] (1) führt in hoher Ausbeute zum unsubstituierten isocloso-Ruthenaboran [1-(η6-C6Me6)RuB9H9] (2). Die analoge Verbindung mit Benzol [1-(η6-C6Me6)RuB9H9] wird entsprechend erhalten. Im Gegensatz dazu führt die Reaktion von (1) mit PhNH2 zu einer Reihe von B-Phenylamino-isocloso-Derivaten wie [1-(η6-C6Me6)-2-(PhNH)-isocloso-1-RuB9H8] (3) (orange Kristalle), [1-(η6-C6Me6)-2,3-(PhNH)2-isocloso-1-RuB9H7] (4) (rotorange) und [1-(η6-C6Me6)-5,6,7-(PhNH)3-isocloso-l-RuB9H6] (5) (dunkelrot). Detaillierte 1H- und 11B-NMR-Spektren werden angegeben. Die Struktur von (3) wird durch eine Einkristall-Röntgen-Strukturanalyse des Solvats [1-(η6-C6Me6)-2-(PhNH)-isocloso-1-RuB9H8] · 1/2 CH2C12 ermittelt; die Kristalle sind monoklin, Raumgruppe C2/c, mit a = 1895,1(3), b = 1556,6(3), c = 1716,4(3)pm, β = 104,37(1)° und Z = 8.
    Notes: The action of SMe2 on the ten-vertex nido-ruthenaborane [6-(η6-C6Me6)RuB9Hl3] (1) provides a high-yield route to the unsubstituted isocloso-ruthenaborane [1-(η6-C6Me6)RuB9H9] (2). The benzene analogue [1-(η6-C6Me6)RuB9H9] is prepared similarly. By contrast, reaction of (1) with PhNH2 gives a variety of B-phenylamino isocloso derivatives, including orange crystals of [1-(η6-C6Me6)-2-(PhNH)-isocloso-1-RuB9H8] (3), red-orange [1-(η6-C6Me6)-2,3-(PhNH)2-isocloso-1-RuB9H7] (4) and dark-red [1-(η6-C6Me6)-5,6,7-(PhNH)3-isocloso-1-RuB9H6] (5). Detailed 1H and 11B nmr properties of these various compounds are described. The structure of (3) has been established by a single-crystal X-ray diffraction study of the solvate [1-(η6-C6Me6)-2-(PhNH)-isocloso-1-RuB9H8] · 1/2 CH2Cl2; the crystals were monoclinic, space group C2/c, with a = 1895.1(3), b = 1556.6(3), c = 1716.4(3) pm, β = 104.37(1)° and z = 8.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926161013
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  • 3
    Electronic Resource
    Electronic Resource
    Organoruthenaborane Chemistry. IXFor Part VIII see reference [7].. The Reactions of [{(η6-C6Me6)RuCl2}2] and [{(η6-MeC6H4-4-iPr)RuCl2}2] with the [nido-B9H12]- anionDedicated to Professor Hans-Georg von Schnering on his 60th Birthday (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 598 (1991), S. 45-52 
    Details
    ISSN: 0044-2313
    Keywords: Ruthenium ; boranes ; organoruthenaboranes ; preparation ; mass, n.m.r. spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organoruthenaboran-Chemie. IX. Die Reaktion von [{(η6-C6Me6)RuCl2}2] und [{(η6-MeC6H4-4-iPr)RuCl2}2] mit dem [nido-B9H12]--AnionDie Reaktion zwischen [NnBu4][nido-B9H12] und [{(η6-C6Me6)RuCl2}2] in CH2Cl2-Lösung ergibt [5-Cl-6-(η6-C6Me6)-nido-6-RuB9H12] (12%), [6-(η6-C6Me6)-nido-6-RuB9H13] (1%) und [1-(η6-C6Me6)-isocloso-1-RuB9H9] (2%). Die entsprechende Reaktion mit dem p-Cymol-Analogon [{(η6-MeC6H4-iPr)RuCl2}2] ergibt [5-Cl-6-(η6-MeC6H4-4-iPr)-nido-6-RuB9H12] (15%), [6-(η6-MeC6H4-4-iPr)-nido-6-RuB9H13] (1%) und [1-(η6-MeC6H4-4-iPr)-isocloso-1-RuB9H9] (3%). Die Produkte sind gelbe, luftstabile Festkörper; sie wurden chromatographisch getrennt und massenspektroskopisch und NMR-spektroskopisch charakterisiert.
    Notes: Reaction between [NnBu4][nido-B9H12] and [{(η6-C6Me6)RuCl2}2] in CH2Cl2 solution yields [5-Cl-6-(η6-C6Me6)-nido-6-RuB9H12] (12%), [6-(η6-C6Me6)-nido-6-RuB9H13] (1%), and [1-(η6-C6Me6)-isocloso-1-RuB9H9] (2%). The corresponding reaction with the p-cymene analogue [{(η6-MeC6H4-4-iPr)RuCl2}2] yields [5-Cl-6-(η6-MeC6H4-4-iPr)-nido-6-RuB9H12] (15%), [6-(η6-MeC6H4-4-iPr)-nido-6-RuB9H13] (1%), and [1-(η6-MeC6H4-4-iPr)-isocloso-1-RuB9H9] (3%). The products were all yellow, air-stable solids; they were separated by chromatography and characterized by mass spectrometry and n.m.r. spectroscopy.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915980105
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  • 4
    Electronic Resource
    Electronic Resource
    Polyhedral Ruthenaborane Chemistry Preparation, Molecular Structure, and N.M.R. Properties of the Mixed-Ligand Eleven-Vertex isocloso-Type Compound [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2,3-(OEt)2]Dedicated to Professor Rudolf Hoppe on his 65th Birthday (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 553 (1987), S. 24-34 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyedrische Ruthenaboran-Chemie: Darstellung, Molekularstruktur und NMR-Eigenschaften der ligandengemischten, elfeckigen isocloso-Verbindung [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2,3-(OEt)2]Umsetzung von [1,1-(PPh3)2-closo-1-RuB10H8 -2,3-(OEt)2]1) 1 mit dem basischeren Liganden PMe3 ersetzt leicht das PPh3 unter Bildung der bisher nicht mitgeteilten ligandengemischten Verbindung [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2,3-(OEt)2] 2, die durch Einkristall Röntgen-Analyse charakterisiert wird. Die Kristalle sind monoklin, Raumgruppe P21, mit a = 1059,2(2), b = 1291,5(2), c = 1187,6(2) pm, β = 91,56(1)°, Z = 4; dem endlich R = Faktor von 0,0198 für 3303 beobachtete Reflexe [I〉2,0 s̰(I)]. Verbindung 2 wird ferner charakterisiert durch detaillierte Mehrkern-, Mehrfachresonanz- und Mehrdimensionale-NMR-Spektroskopie (1H, 1H-{11B}, [1H-1H] {11B}-COSY, 11B-{1H} und 31P).
    Notes: Treatment of [1,1-(PPh3)2-closo-1-RuB10H8-2, 3-(OEt)2]1) 1 with the more basic ligand PMe3 readily results in the displacement of PPh3 to form the hitherto unreported mixed ligand compound [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2, 3-(OEt)2] 2, which is characterized by singlecrystal X-ray diffraction analysis. Crystals are monoclinic, space group P21, with a = 1059.2(2), b = 1291.5(2), c = 1187.6(2) pm, β = 91.56(1)°, Z = 4; the final R factor is 0.0198 for 3303 observed reflections [I〉2.0 s̰(I)]. Compound 2 is also characterized by detailed multielement, multiple resonance, and multidimensional n.m.r. spectroscopy (1H, 1H-{11B}, [1H-1H]{11B}-COSY, 11B, 11B-{1H}, and 31P).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875531004
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  • 5
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    The effects of crushing surface roughness on the crushing characteristics of composite tubes (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The effects of crushing-surface roughness on the energy-absorption capability of graphite and glass-epoxy composite tubes were investigated. Fifty different combinations of fiber, matrix, and specimen ply orientation were evaluated. Two different crushing surface roughnesses were used in this investigation. Crushing surface significantly influences the energy-absorption capability only of tubes that crush in the lamina bending crushing mode; tubes that crush in other modes are not influenced because their lamina bundles do not slide against the crushing surface. Those tubes that crush in the lamina bending mode can achieve higher, lower, or no change in energy-absorption capability as crushing surface roughness increases. If the fiber failure strain of tubes that crush in the lamina bending crushing mode exceeds the matrix failure strain then the energy-absorption capability increases as crushing surface roughness increases. However, if the matrix failure strain exceeds the fiber failure strain then the energy-absorption capability increases as crushing surface roughness decreases. Energy-absorption capability is uninfluenced by crushing surface roughness for tubes that have equal fiber and matrix failure strains.
    Keywords: STRUCTURAL MECHANICS
    Type: American Helicopter Society, Journal (ISSN 0002-8711); 37; 3; p. 53-60.
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    An Experimental and Analytical Evaluation of a Biaxial Test for Determining Shear Properties of Composite Materials (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The results of an experimental and analytical investigation of a biaxial tension/compression test for determining shear properties of composite materials are reported. Using finite element models of isotropic and orthotropic laminates, a specimen geometry was optimized. A kinematic fixture was designed to introduce an equal and opposite pair of forces into a specimen with a one inch square test section. Aluminum and several composite laminates with the optimized geometry and a configuration with large stress gradients were tested in the fixture. The specimens were instrumented with strain gages in the center of the test section for shear stiffness measurements. Pure shear strain was measured. The results from the experiments correlated well with finite element results. Failure of the specimens occurred through the center of the test section and appeared to have initiated at the high stress points. The results lead to the conclusion that the optimized specimen is suitable for determining shear modulus for composite materials. Further revisions to the specimen geometry are necessary if the method is to give shear strength data.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-182928 , NAS 1.26:182928
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Damage tolerance of woven graphite-epoxy buffer strip panels (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Graphite-epoxy panels with S glass buffer strips were tested in tension and shear to measure their residual strengths with crack-like damage. The buffer strips were regularly spaced narrow strips of continuous S glass. Panels were made with a uniweave graphite cloth where the S glass buffer material was woven directly into the cloth. Panels were made with different width and thickness buffer strips. The panels were loaded to failure while remote strain, strain at the end of the slit, and crack opening displacement were monitoring. The notched region and nearby buffer strips were radiographed periodically to reveal crack growth and damage. Except for panels with short slits, the buffer strips arrested the propagating crack. The strength (or failing strain) of the panels was significantly higher than the strength of all-graphite panels with the same length slit. Panels with wide, thick buffer strips were stronger than panels with thin, narrow buffer strips. A shear-lag model predicted the failing strength of tension panels with wide buffer strips accurately, but over-estimated the strength of the shear panels and the tension panels with narrow buffer strips.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-102702 , NAS 1.15:102702
    Format: application/pdf
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