Reaction of Nd(BH4)(3)(THF)(3) with K2COT (COT = eta-C8H8) in tetrahydrofuran (THF) gave the first (cyclooctatetraene)lanthanide borohydride, (COT)Nd(BH4)(THF)(2) (1). By treatment with NHEt3BPh4, 1 was transformed into [(COT)Nd(THF)(4)][BPh4] (3), a unique example of a (cyclooctatetraene)lanthanide cation; both 1 and 3 gave (COT)Nd(Cp*)(THF) (Cp* = eta-C5Me5) upon. reaction with KCp*.
An overview of our work on the synthesis and crystal structure of uranyl-macrocycle complexes is given, with a particular emphasis on inclusion complexes, Examples of both out-of-cavity and inclusion complexes with crown-ethers and azacrowns are given; ion inclusion depends on the cavity size, the solvent and the counter-ion. The structure of a bimetallic inclusion complex with p-tert-butylcalix[8]arene is described.
The doubly deprotonated form of calix[6]arene, with two protonated triethylamines as counter-ions, crystallizes in the monoclinic system: space groupP21/n,a=8.465(4),b=17.822(8),c=15.182(6) Å,β=90.18(4)°,V=2291(2) Å3,Z=2. Refinement led to a final conventionalR value of 0.063 for 1046 reflections. The macrocycle conformation is not apinched cone, usual for freeR-calix[6]arene, but a distorted 1,2,3-alternate cone, since the molecule lies on a symmetry center. Furthermore, one of the torsion angles defined by the methylene bridges is near to zero, which is unusual in calixarene structures.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, characterization, and crystal structure of the tungsten hexafluoride and tetrafluoride oxide adducts WF6.F-py and WOF4.F-py (F-py = 2-fluoropyridine)Lucile Arnaudet, Roland Bougon, Buu Ban, Monique Lance, Martine Nierlich, and Julien VignerCite this: Inorg. Chem. 1993, 32, 7, 1142–1146Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/ic00059a020https://doi.org/10.1021/ic00059a020research-articleACS PublicationsRequest reuse permissionsArticle Views207Altmetric-Citations23LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Aus zwei Mn 2 (μ‐O) 2 ‐Einheiten , die wiederum über zwei Oxobrücken verknüpft sind, besteht der Clusterkern von 1 (Strukturbild rechts, Je zwei Bipyridin(bpy)‐Liganden an Mn1 und Mn4 weggelassen). Dessen Mn‐Mn‐Abstände und magnetische Eigenschaften deuten an, daß der Cluster ein Modell für das Reaktionszenturm der Sauerstofferzeugung in pflanzen sein könnte. Ob die Mn 4 ‐Anordnung im natürlich vorkommenden Enzym kettenförmig oder Teil einer Cubanstruktur ist, bleibt jedoch weiter offen. magnified image
The synthesis and characterization of A(N3), [Na(18-crown-6)] [A(N3)], [A(N3A][BPh4], [Na(18-crown-6)] [A(N3)A] and A(N3)A [A = (C5H4SiMe3)3U] are reported.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation characterization and crystal structure of chloryl hexafluororuthenate(1-). Crystal structure of [ClF2]+[RuF6]-Roland Bougon, Walter V. Cicha, Monique Lance, Laurent Meublat, Martine Nierlich, and Julien VignerCite this: Inorg. Chem. 1991, 30, 1, 102–109Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https://pubs.acs.org/doi/10.1021/ic00001a019https://doi.org/10.1021/ic00001a019research-articleACS PublicationsRequest reuse permissionsArticle Views123Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
U(BH4)4 has been shown to react with (COT)2U (COT = η-C8H8) or cyclooctatetraene to give the monocyclooctatetraenyl complex (COT)U(BH4)2 (III), which has been converted into the Lewis base adducts (COT)U(BH4)2L (L = PPh3, V; THF, VI; OPPh3, VII) and the mixed ring derivatives (COT(Cp)U(BH4)L (Cp = η-C5H5; L = THF; OPPh3. VIII). The crystal structure of VII shows it to have a three-legged piano stool configuration.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, characterization, and crystal structure of the adducts WOF4.nC5H5N (n = 1, 2)Lucile Arnaudet, Roland Bougon, Buu Ban, Pierrette Charpin, Jacques Isabey, Monique Lance, Martine Nierlich, and Julien VignerCite this: Inorg. Chem. 1989, 28, 2, 257–262Publication Date (Print):January 1, 1989Publication History Published online1 May 2002Published inissue 1 January 1989https://doi.org/10.1021/ic00301a020RIGHTS & PERMISSIONSArticle Views138Altmetric-Citations25LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (671 KB) Get e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of nickel(2+) hexafluorobismuthate(1-) and of the ternary adducts [Ni(CH3CN)6](BiF6)2 and [Ni(CH3CN)6](SbF6)2. Crystal structure of hexakis(acetonitrile-d3)nickel(2+) hexafluoroantimonateRoland Bougon, Pierrette Charpin, Karl O. Christe, Jacques Isabey, Monique Lance, Martine Nierlich, Julien Vigner, and William W. WilsonCite this: Inorg. Chem. 1988, 27, 8, 1389–1393Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 April 1988https://doi.org/10.1021/ic00281a018RIGHTS & PERMISSIONSArticle Views204Altmetric-Citations29LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (518 KB) Get e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
The average structure of the title compound, Co(H2fsa2en)(py)2, which has been shown previously to exhibit a thermally induced high-spin ↔ low-spin crossover, has been investigated by single-crystal X-ray diffraction. This structure has been solved in the monoclinic space groupC2/c (No. 15), with cell dimensionsa=16.641(5),b=9.496(4),c=16.329(6) Å, andβ=95.47(3)°;V=2569(3) Å3,M r =571.46,Z=4,D x =1.478 mg m−3; MoKα radiation (graphite crystal monochromator),λ=0.71073 Å,μ(MoKα)=7.138 cm−1;T=295 K andR=0.081 for 681 observed [I>3σ(I)] independent reflections. The cobalt(II) ion resides on a twofold axis in an elongated octahedral environment, the length of the apical bond (formed with pyridine) being 2.262(12) Å and the mean length of the equatorial bonds (formed with the Schiff base) 2.079(12) Å. These values are consistent with the magnetic behavior, which suggested a distorted surrounding for the metal atom. The packing is essentially governed by the parallelism of the salicylaldimine ligands. The two pyridine rings of the molecule are twisted by ~98° on each side of the basal plane; they are probably affected by orientational disorder or, if ordered, they might be described in a superstructure not yet established.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of the anion [(.eta.5-C5H5)3 UIII-n-C4H9]-. Synthesis and crystal structure of tricyclopentadienyl n-butyluranium(III) lithium cryptate: [(C5H5)3UC4H9]-[LiC14H28N2O4]+Lucile Arnaudet, Pierrette Charpin, Gerard Folcher, Monique Lance, Martine Nierlich, and Daniel VignerCite this: Organometallics 1986, 5, 2, 270–274Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://doi.org/10.1021/om00133a017RIGHTS & PERMISSIONSArticle Views97Altmetric-Citations33LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (616 KB) Get e-AlertsSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts