1,720,998 research outputs found
A Structurally Characterized Organometallic Plutonium(IV) Complex
No full textbibtex: ISI:000399384700030 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Walter, O (Reprint Author), European Commiss, Joint Res Ctr, Directorate Nucl Safety & Secur G, POB 2340, D-76125 Karlsruhe, Germany. Vogt, J; Edelmann, FT (Reprint Author), Otto von Guericke Univ, Inst Chem, Univ Pl 2, D-39106 Magdeburg, Germany. Maron, L (Reprint Author), Univ Toulouse, INSA, CNRS, Lab Phys & Chim Nanoobjets LPCNO,UMR5215, 135 Ave Rangueil, F-31077 Toulouse 4, France. Apostolidis, Christos; Walter, Olaf, European Commiss, Joint Res Ctr, Directorate Nucl Safety & Secur G, POB 2340, D-76125 Karlsruhe, Germany. Vogt, Jochen; Liebing, Phil; Edelmann, Frank T., Otto von Guericke Univ, Inst Chem, Univ Pl 2, D-39106 Magdeburg, Germany. Maron, Laurent, Univ Toulouse, INSA, CNRS, Lab Phys & Chim Nanoobjets LPCNO,UMR5215, 135 Ave Rangueil, F-31077 Toulouse 4, France.','author-email':'[email protected] [email protected] [email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'ES2UZ',eissn:'1521-3773','funding-acknowledgement':'Otto-von-Guericke-Universitat Magdeburg','funding-text':'We thank the Otto-von-Guericke-Universitat Magdeburg for general financial support.','journal-iso':'Angew. Chem.-Int. Edit.','keywords-plus':'TRIS(ETA-5-CYCLOPENTADIENYL) ACTINIDE COMPLEXES; FOCK PERTURBATION-THEORY; BUILDING-BLOCK APPROACH; F-ORBITAL COVALENCY; SANDWICH COMPLEXES; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; CYCLOOCTATETRAENYL COMPLEXES; TH-PU; ACTINOCENES','number-of-cited-references':'69',oa:'Other Gold, Green Published','orcid-numbers':'Edelmann, Frank T./0000-0001-5209-0018 walter, olaf/0000-0002-2679-1715 Liebing, Phil/0000-0002-4660-1691','research-areas':'Chemistry','times-cited':'8','unique-id':'ISI:000399384700030','usage-count-last-180-days':'2','usage-count-since-2013':'23','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceThe blood-red plutonocene complex Pu(1,3-COT `')(1,4-COT `') (4; COT `' = eta(8)-bis(trimethylsilyl) cyclooctatetraenyl) has been synthesized by oxidation of the anionic sandwich complex Li[Pu(1,4-COT `')(2)] (3) with anhydrous cobalt(II) chloride. The first crystal structure determination of an organoplutonium(IV) complex revealed an asymmetric sandwich structure for 4 where one COT `' ring is 1,3-substituted while the other retains the original 1,4-substitution pattern. The electronic structure of 4 has been elucidated by a computational study, revealing a probable cause for the unexpected silyl group migration
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Mehrkernige Metallkomplexe mit neuen O-, S-, und P-funktionalisierten Silandianilido-Liganden - Synthese, Struktur und Eigenschaften
Full text linkKomplexverbindungen mit Silandiamido-Liganden des Typs {R2Si(NR’)2}2– sind von Interesse in der homogenen Katalyse und als Precursormaterialien für Metallnitride. Während Komplexe von zahlreichen zwei-, drei- und vierwertigen Metallen untersucht worden sind, sind mit Ausnahme von Lithium kaum Derivate einwertiger Metalle bekannt. Eine wesentliche Fragestellung dabei ist der Einfluss zusätzlicher Donorgruppen auf Struktur und Eigenschaften der Verbindungen. O- und S-funktionalisierte Silandianiline Me2Si(NH-phn-X)2 (-phn- = ortho-phenylen; X = OMe, OPh, SMe, SPh) und deren Alkalimetallderivate A2{Me2Si(N-phn-X)2} (A = Li, Na, K) wurden nach Standardmethoden dargestellt. Die Li-Derivate reagieren mit Metallchloriden MICl (MI = Cu, Ag, Au, Tl) bzw. Chlorido-Komplexen [MICl(L)n] (L = THT, Phosphan) zu monomeren, dimeren oder tetrameren Komplexen. Mit P-Donorgruppen wurden tertiäre Silandianiline Me2Si(N(Y)Ph)2 (Y = PPh2, PSPh2) synthetisiert, die sich als bidentate Neutralliganden für Cu(I), Ag(I) und Au(I) eignen. Alle Produkte wurden mittels spektroskopischer Methoden und Röntgeneinkristalldiffraktometrie charakterisiert.Complex compounds with {R2Si(NR’)2}2–-type silanediamido ligands are of interest in the field of homogeneous catalysis and as precursor material for metal nitrides. While complexes of bi-, tri- and tetravalent metals have been investigated, derivatives of monovalent metals excepting lithium are rarely known. A central question thereby is the influence of additional donor functionalities on molecular structure and properties of the compounds. O- and S-functionalized silanedianilines Me2Si(NH-phn-X)2 (-phn- = ortho-phenylene; X = OMe, OPh, SMe, SPh) and their alkali metal derivatives A2{Me2Si(N-phn-X)2} (A = Li, Na, K) were prepared with standard methods. The Li derivatives react with metal chlorides MICl (MI = Cu, Ag, Au, Tl) and chlorido complexes [MICl(L)n] (L = tht, phosphine) to form various monomeric, dimeric and tetrameric complexes. With P-donor groups tertiary silanedianilines Me2Si(N(Y)Ph)2 (Y = PPh2, PSPh2) were synthesized, which are suitable as bidentate neutral ligands for Cu(I), Ag(I) and Au(I). All products were characterized by spectroscopic methods and single crystal x-ray diffraction.von Phil Liebin
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