Papers by Karin Issberner
Zeitschrift für anorganische und allgemeine Chemie, Mar 1, 1998
Professor Hartmut Ba Èrnighausen zum 65. Geburtstag gewidmet Inhaltsu È bersicht. Bei Versuchen z... more Professor Hartmut Ba Èrnighausen zum 65. Geburtstag gewidmet Inhaltsu È bersicht. Bei Versuchen zur Isolierung des thermisch instabilen Lithium-silylphosphanids schieden sich bei ±60°C aus 1,2-Dimethoxyethan Einkristalle des bisher unbekannten Dismutierungsproduktes Bis(1,2-dimethoxyethan-O,O')lithiumphosphanid (1) ab. Das homologe Arsanid 2 kristallisierte aus, nachdem eine bei ±78°C eingefrorene Lo È sung von Arsan im selben Lo È sungsmittel mit Lithium-n-butanid behandelt worden war. Ebenso unerwartet fielen bei Reaktionen von 1-Chlor-2,2-bis(trimethylsilyl)-1k 3-phosphaethen mit (1,2-Dimethoxyethan-O,O')lithium-bis(trimethylsilyl)stibanid bzw. von Lithium-1,2,3,4,5-pentaphenyl-2,3-dihydro-1k 3-phosphol-3-id mit x-Bromstyrol in 1,2-Dimethoxyethan das analog zusammengesetzte Chlorid 3 und Bromid 4 an. Die mono
Dermatologic Surgery, 2008
BACKGROUND Compression bandages appear to be simple medical devices. However, there is a lack of ... more BACKGROUND Compression bandages appear to be simple medical devices. However, there is a lack of agreement over their classification and confusion over the use of important terms such as elastic, inelastic, and stiffness. OBJECTIVES The objectives were to propose terms to describe both simple and complex compression bandage systems and to offer classification based on in vivo measurements of subbandage pressure and stiffness. METHODS A consensus meeting of experts including members from medical professions and from companies producing compression products discussed a proposal that was sent out beforehand and agreed on by the authors after correction. RESULTS Pressure, layers, components, and elastic properties (P-LA-C-E) are the important characteristics of compression bandages. Based on simple in vivo measurements, pressure ranges and elastic properties of different bandage systems can be described. Descriptions of composite bandages should also report the number of layers of bandage material applied to the leg and the components that have been used to create the final bandage system. CONCLUSION Future descriptions of compression bandages should include the subbandage pressure range measured in the medial gaiter area, the number of layers, and a specification of the bandage components and of the elastic property (stiffness) of the final bandage. E. Steinlechner and M. Abel are employees of Lohmann & Rauscher, J. Hutchinson is an employee of ConvaTec, J. Schuren and K. Issberner are 3M employees. Jan Schuren has a patent application on one mentioned product. Travel expenses of the active participants were covered by the Industrial Board.
Organometallics, 1997
The anionic 1,3-cycloaddition reaction of the (1,2,3-triphenyl-1-phosphaallyl)lithium species Li(... more The anionic 1,3-cycloaddition reaction of the (1,2,3-triphenyl-1-phosphaallyl)lithium species Li(dme) 3 [PhP-CPhdC(Ph)H] (1) with diphenylacetylene followed by protonation of the anionic intermediate 2 gave diastereoselectively 1,2,3,4,5-pentaphenyl-2,3-dihydrophosphole (3). The relative cis,trans-stereochemistry of the C4,C5,P-unit has been established by X-ray structure analysis. Addition of 1 to the Fischer-type tungsten amino alkynyl carbene complex (CO) 5 WdC[N(CH 2) 4 ]-CtCPh (4) yielded, after protonation, the metal carbene modified dihydrophosphole 8, which, in contrast, exhibits a trans,trans-diphenyl substitution pattern. Thus, a different reaction pathway is suggested, containing an acyclic intermediate, which could be trapped by deuteration to give the (vinylphosphino)vinylcarbene complex (CO) 5 WdC-[N(CH 2) 4 ]-CDdC(Ph)-P(Ph)-CPhdC(Ph)H (10). Thermal decarbonylation of 10 led to the chelate complex (CO) 4 WdC[N(CH 2) 4 ]-CDdC(Ph)-P(Ph)-CPhdC(Ph)H (11). The reaction of 1 with the tungsten methoxy alkynyl carbene complex (CO) 5 WdC-(OCH 3)-CtC(p-Tol) (5) and subsequent protonation afforded the acyclic (vinylphosphino)vinyl carbene complex (CO) 5 WdC(OCH 3)-CHdC(p-Tol)-P(Ph)-CPhdC(Ph)H (9), which underwent rearrangement to the allenyl(vinyl)phosphane complex [(OCH 3)CHdCdC(p-Tol)][PhCdC(H)Ph](Ph)P-[W(CO) 5 ]Ph-CPhdC(Ph)H (12). † Dedicated to Professor S. D. Peyerimhoff on the occasion of her 60th birthday.
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Papers by Karin Issberner