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Direct Synthesis of High-Valent Aryl–Cu(II) and Aryl–Cu(III) Compounds: Mechanistic Insight into Arene C–H Bond Metalation

Article ACS ActiveView PDF Hi-Res Print, Annotate, Reference QuickView PDF  [1941 KB] PDF w/ Links [472 KB] Full Text HTML Abstract Supporting Info -> Figures Reference QuickView Add to ACS ChemWorx Hu Zhang   † ‡ ,  Bo Yao   † ‡ ,  Liang Zhao   † ,  De-Xian Wang ‡ ,  Bo-Qing Xu   † , and  Mei-Xiang Wang   * † †  Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education),  Tsinghua University , Beijing 100084,  China ‡  Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function,  Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190,  China J. Am. Chem. Soc. , Article ASAP DOI:  10.1021/ja412615h Publication Date (Web): April 14, 2014 Copyright © 2014 American Chemical Society wangmx@mail.tsinghua.edu.cn Section: Organometallic and Organometa...

Modeling Biological Copper Clusters: Synthesis of a Tricopper Complex, and Its Chloride- and Sulfide-Bridged Congeners

Article ACS ActiveView PDF Hi-Res Print, Annotate, Reference QuickView PDF  [1995 KB] PDF w/ Links [371 KB] Full Text HTML Abstract Supporting Info -> Figures Reference QuickView Add to ACS ChemWorx Gianna N. Di Francesco   ,  Aleth Gaillard   ,  Ion Ghiviriga   ,  Khalil A. Abboud   , and  Leslie J. Murray   * Department of Chemistry, Center for Catalysis, University of Florida , Gainesville, Florida 32611-7200, United States Inorg. Chem. , Article ASAP DOI:  10.1021/ic500333p Publication Date (Web): April 18, 2014 Copyright © 2014 American Chemical Society *E-mail:  murray@chem.ufl.edu . Synopsis Reaction of a tricopper(I) tris(β-diketiminate) cyclophane complex with sulfur affords a (μ3-sulfido)tricopper(I/II/II) cluster, Cu3(μ3-S)L, which can be chemically reduced to the corresponding valence-delocalized species [Cu3(μ3-S)L]−. Abstract The synthesis and charact...

Theoretical Spectroscopy and Photodynamics of a Ruthenium Nitrosyl Complex

Forum Article ACS ActiveView PDF Hi-Res Print, Annotate, Reference QuickView PDF  [2564 KB] PDF w/ Links [593 KB] Full Text HTML Abstract Figures Reference QuickView Add to ACS ChemWorx Leon Freitag   and  Leticia González   * Institut für theoretische Chemie,  Universität Wien , Währinger Straße 17, 1090 Vienna,  Austria Inorg. Chem. , Article ASAP DOI:  10.1021/ic500283y Publication Date (Web): April 21, 2014 Copyright © 2014 American Chemical Society *E-mail:  leticia.gonzalez@univie.ac.at . Synopsis How is nitric oxide (NO) released in photoactive transition-metal nitrosyl complexes? Electronic structure calculations and nonadiabatic molecular dynamics are employed to investigate the NO photodissociation mechanism of [Ru(PaPy3)(NO)]2+. Excited states are calculated with time-dependent density functional theory and multiconfigurational CASSCF/CASPT2 spin-corrected methods. Molecular dynamics sh...

Oxidative Stretching of Metal–Metal Bonds to Their Limits

Article ACS ActiveView PDF Hi-Res Print, Annotate, Reference QuickView PDF  [3820 KB] PDF w/ Links [719 KB] Full Text HTML Abstract Supporting Info -> Figures Reference QuickView Add to ACS ChemWorx David W. Brogden   † ,  Yevgeniya Turov   † ,  Michael Nippe   † ,  Giovanni Li Manni   ‡ ,  Elizabeth A. Hillard   § ,  Rodolphe Clérac   § ,  Laura Gagliardi   ‡ , and  John F. Berry   † * †  Department of Chemistry,  University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706,  United States ‡  Department of Chemistry, Supercomputing Institute, and Chemical Theory Center,  University of Minnesota , Minneapolis, Minnesota 55455,  United States §  CNRS, CRPP, UPR 8641, F-33600 Pessac,  France  Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac,  France Inorg. Chem. , Article ASAP DOI:  10.10...

Nucleophilic Reactivity of a Copper(II)–Superoxide Complex

Keywords: bioinorganic chemistry; dioxygen activation; nucleophilic reactivity; reaction mechanisms; superoxide complexes Abstract Metal-bound superoxide intermediates are often implicated as electrophilic oxidants in dioxygen-activating metalloenzymes. In the nonheme iron α-ketoglutarate dependent oxygenases and pterin-dependent hydroxylases, however, Fe III –superoxide intermediates are postulated to react by nucleophilic attack on electrophilic carbon atoms. By reacting a Cu II –superoxide complex ( 1 ) with acyl chloride substrates, we have found that a metal–superoxide complex can be a very reactive nucleophile. Furthermore,  1  was found to be an efficient nucleophilic deformylating reagent, capable of Baeyer–Villiger oxidation of a number of aldehyde substrates. The observed nucleophilic chemistry represents a new domain for metal–superoxide reactivity. Our observations provide support for the postulated role of metal–superoxide intermediates in nonh...

A Biomimetic Catalytic Aerobic Functionalization of Phenols

Keywords: ortho -Chinone; Kupfer; Oxidationen; Synthesemethoden; Tyrosinase Abstract The importance of aromatic C O, C N, and C S bonds necessitates increasingly efficient strategies for their formation. Herein, we report a biomimetic approach that converts phenolic C H bonds into C O, C N, and C S bonds at the sole expense of reducing dioxygen (O 2 ) to water (H 2 O). Our method hinges on a regio- and chemoselective copper-catalyzed aerobic oxygenation to provide  ortho -quinones.  ortho -Quinones are versatile intermediates, whose direct catalytic aerobic synthesis from phenols enables a mild and efficient means of synthesizing polyfunctional aromatic rings. View Full Article with Supporting Information (HTML)   Enhanced Article (HTML)   Get PDF (1173K)

Unexpected NO Transfer Reaction between trans-[RuII(NO+)(NH3)4(L)]3+and Fe(III) Species: Observation of a Heterobimetallic NO-Bridged Intermediate

Article ACS ActiveView PDF Hi-Res Print, Annotate, Reference QuickView PDF  [998 KB] PDF w/ Links [339 KB] Full Text HTML Abstract Supporting Info -> Figures Reference QuickView Add to ACS ChemWorx Gustavo Metzker   † ,  Pietro P. Lopes   † ‡ ,  Augusto C. H. da Silva   † ,  Sebastiao C. da Silva   § , and  Douglas W. Franco   * † †  Instituto de Química de São Carlos,  Universidade de São Paulo , Avenida Trab. São-Carlense 400, São Carlos, SP,  Brazil ‡   Argonne National Laboratory , 9700 S Cass Avenue, Lemont, Illinois,  United States §   Universidade Federal de Mato Grosso , Avenida Fernando Corrêa da Costa 2367, Cuiaba, MS,  Brazil Inorg. Chem. , Article ASAP DOI:  10.1021/ic500122b Publication Date (Web): April 16, 2014 Copyright © 2014 American Chemical Society *E-mail:  douglas@iqsc.usp.br .  Dedication Dedicated to the m...