Bis(alkyne) complexes of niobium(I), containing the alkyne as a three-electron donating ligand
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Gold(I) chloride (stabilized by tetrahydrothiophene) reacts with the cycloheptynes 3,3,6,6-tetramethyl-1-thiacyclohept-4-yne-1,1-dioxide (SO2-alkyne) and 3,3,6,6-tetramethyl-1-thiacyclohept-4-yne (S-alkyne) to afford the complexes [(η2-alkyne)AuCl]n [n = 2 (SO2-alkyne), n = ∞ (S-alkyne)]; the X-ray structures of both compounds show trigonal-planar gold(I) centres and very short Au–C(alkyne) bonds.
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This chapter contains sections titled: Coordination Compounds with the Metals of Transition Group I Coordination Compounds with the Metals of Transition Group II Coordination Compounds with the Metals of Transition Group III Coordination Compounds with the Metals of Transition Group IV Coordination Compounds with the Metals of Transition Group V Coordination Compounds with the Metals of Transition Group VI Coordination Compounds with the Metals of Transition Group VII Coordination Compounds with the Metals of Transition Group VIII
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This chapter contains sections titled: Introduction Coordination Compounds with the Metals of Nontransition Group I Coordination Compounds with the Metals of Nontransition Group II Coordination Compounds with the Metals of Nontransition Group III Coordination Compounds with the Metals of Nontransition Group VI Coordination Compounds with the Metals of Nontransition Group V and VI Coordination Compounds with the Metals of Transition Group I Coordination Compounds with the Metals of Transition Group II Coordination Compounds with the Metals of Transition Group III Coordination Compounds with the Metals of Transition Group VI Coordination Compounds with the Metals of Transition Group V Coordination Compounds with the Metals of Transition Group VI Coordination Compounds with the Metals of Transition Group VII Coordination Compounds with the Metals of Transition Group VIII
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The application of low-valent group 13 metal compounds as ligands in coordination chemistry results in the formation of new metal-to-metal bonds. Traditionally, the coordination chemistry of these compounds was focused on late transition metals. This article now reviews recent progress of the coordination chemistry of compounds with low-valent group 13 metals in the chemistry of electron poor main group and transition metal as well as in f-block elements.
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The use of the bulky hydrotris(3-mesitylpyrazolyl)borate anionic ligand has allowed the synthesis of stable TpMsCu(alkyne) complexes (alkyne = 1-hexyne, 1, phenylacetylene, 2, and ethyl propiolate, 3). The spectroscopic and structural features of these compounds and their relative reactivity have been examined, indicating the existence of a low π back-bonding from the copper(I) centre to the alkyne. Ligand exchange experiments have shown that terminal alkyne adducts are more stable than internal alkyne analogues. In good accordance with this, the previously reported alkyne cyclopropenation reaction catalysed by the TpxCu complexes can be rationalized and correlated with their relative stability.
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Phenylacetylene
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Diphenylacetylene
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Thione- and selone-containing compounds and their transition metal complexes have been investigated for purposes ranging from antioxidant and anti-tumor activity to materials for optical electronics and light emitting diodes. With current investigations of sulfur-rich metalloenzyme active sites as well as the antioxidant activity of ergothioneine, selenoneine, and thione-containing anti-thyroid drugs, the coordination chemistry of thione and selone ligands with biologically common first-row transition metals has sparked considerable recent interest. This review focuses on the biological functions of thione- and selone-containing compounds, their coordination chemistry with iron, cobalt, nickel, copper, and zinc, and the biological implications of this chalcogenone-metal binding. While thione-metal coordination has been widely studied, only a few selone-metal complexes with first-row transition metals have been reported.
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeven-coordinate complexes of first-row transition metalsRobert K. Boggess and William D. Wiegele Cite this: J. Chem. Educ. 1978, 55, 3, 156Publication Date (Print):March 1, 1978Publication History Received3 August 2009Published online1 March 1978Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/ed055p156https://doi.org/10.1021/ed055p156research-articleACS PublicationsRequest reuse permissionsArticle Views385Altmetric-Citations6LEARN 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-Alertsclose Get e-Alerts
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Coordination sphere
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Elsevier Biobase
Coordination complex
Theoretical chemistry
Material chemistry
Industrial chemistry
Polystyrene
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FLUIDEX
Food chemistry
Radiation chemistry
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