This work directly compares the spectroscopic and reactivity properties of an oxoiron(IV) and an oxoiron(V) complex that are supported by the same neutral tetradentate N-based PyNMe3 ligand. A complete spectroscopic characterization of the oxoiron(IV) species (2) reveals that this compound exists as a mixture of two isomers. The reactivity of the thermodynamically more stable oxoiron(IV)
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High valent iron species are very reactive molecules involved in oxidation reactions of relevance to biology and chemical synthesis. Herein we describe iron(IV)–tosylimido complexes [FeIV(NTs)(MePy2tacn)](OTf)2 (1(IV) NTs) and [FeIV(NTs)(Me2(CHPy2)tacn)](OTf)2 (2(IV) NTs), (MePy2tacn = N-methyl-N,N-bis(2-picolyl)-1,4,7-triazacyclononane, and Me2(CHPy2)tacn = 1-(di(2-pyridyl)methyl)-4,7-dimethyl-1,4,7-triazacyclononane, Ts = Tosyl). 1(IV) NTs and 2(IV) NTs are rare examples of octahedral iron(IV)–imido complexes and are isoelectronic analogues of the recently described iron(IV)–oxo
Yesterday, our former member of IQCC Oriol Planas was awarded the Premi Extraordinari for the best PhD thesis in 2018 from the University of Girona. Last year, he defended with success his PhD thesis on “Cobalt-catalyzed C-H functionalization”, supervised by Xavi Ribas and Anna Company. Now, Oriol is continuing his research as a postdoc in the group of Prof. Josep
Combining an electrophilic iron complex [Fe(Fpda)(THF)]2 (3) [Fpda=N,N’-bis(pentafluorophenyl)-o-phenylenediamide] with the pre-activation of a-alkyl-substituted a-diazoesters reagents by LiAl(ORF)4 [ORF=(OC(CF3)3] provides unprecedented access to selective iron-catalyzed intramolecular functionalization of strong alkyl C(sp3)-H bonds. Reactions occur at 25°C via a-alkyl-metallocarbene intermediates, and with activity/selectivity levels similar to those of rhodium carboxylate catalysts. Mechanistic investigations reveal a crucial role of the
Multimeric enzyme complexes are ubiquitous in nature and catalyze a broad range of useful biological transformations. They are often characterized by a tight allosteric coupling between subunits, making them highly inefficient when isolated. A good example is Tryptophan synthase (TrpS), an allosteric heterodimeric enzyme in the form of an abba complex that catalyzes the biosynthesis of
The structures of two bis-ethylpyrrolidinoadducts of Gd3N@Ih-C80, obtained by regioselective 1,3-dipolar cycloadditions, were elucidated by single crystal X-ray, visible-near infrared (vis-NIR) spectra, studies on their thermal isomerization, and theoretical calculations. The structure of the minor-bis-adduct reveals a C2-symmetric carbon cage with [6,6][6,6]-addition sites and with an endohedral Gd3N cluster that is completely flattened. This is
During the 20th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis (OMCOS 20) that was held from July 21 to 25 in Heidelberg, Germany, Carla Magallon won the poster prize. Her poster had as title “Synthesis and characterization of organometallic iron complexes for gaining mechanistic insights in cross-coupling reactions”. Congratulations Carla!
Next Tuesday (23th of July, 11.20 h – 14.00 h) will take place the Summer edition of the IQCC Forum, a quarterly meeting-place where high-quality science will be discussed. The IQCC Forum gives the opportunity for PhD and postdoc members of the IQCC to present their work to a wide audience. This will lead to
After having won last year three times the poster prize at different conferences (Girona, Berlin, Liverpool), this week Lorenzo D’Amore won the Poster Prize at QBIC-V in Marseille. Congratulations Lorenzo!!!!
Next year (May 4-7th) there will be the main event of the year Girona Seminar 2020 and the corresponding Young Researchers Symposium. The meetings will be held from May 4-7, 2020 at the Auditorium of the Centre Cultural “La Mercè” in the city of Girona (Spain). The Girona Seminar has an outstanding reputation for excellence and highly engaged discussion,