Accès ouvert
2026
article
OpenAlex
Jan Soyka, Margarita Yanbaeva, Niklas Limberg, Alok Mahata et autres
We report the synthesis, structural characterization, and optoelectronic properties of a highly electron‐deficient bi(cyclopropylidene)‐framework ( CN8CP2 ). The developed one‐pot synthesis gives access to the dianionic species via thermally induced homocoupling of an iodinated precursor. The controlled oxidation yields the radical anion, …
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Accès ouvert
2026
article
OpenAlex
Dana Kutzinski, Raffaella Papagna, Elric Engelage, Lianne H E Wieske et autres
Even though halogen bonding is routinely used in crystal engineering and beyond, motifs offering multipoint interactions are still rare. This applies in particular to self-complementary systems which incorporate both halogen bond donating and accepting moieties. In this study, we present the first …
de, se
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Accès ouvert
2025
article
OpenAlex
Christoph Buchelt, Stefan Breitenlechner, Julian Zuber, Stefan M. Huber et autres
High Resolution Image Download MS PowerPoint Slide Upon catalysis (1 mol %) by a chiral cobalt porphyrin, quinazolinones with a tethered diazo alkane precursor underwent an enantioselective C–H alkylation at carbon atom C4. Formation of five-, six-, and seven-membered rings was successfully …
de
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2025
other
OpenAlex
Meghana Poliyodath Mohanan, Dragana Jovanovic, Stefan M. Huber
This chapter provides an overview and covers key advancements of noncovalent organocatalysis with interactions based on electrophilic halogen, chalcogen and pnictogen centers. While the focus is on the latest trends, a short introduction on earlier studies is also provided for each interaction. …
de
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Accès ouvert
2025
article
OpenAlex
Christoph J. Vonnemann, Elric Engelage, Jas S. Ward, Kari Rissanen et autres
We recently introduced multidentate halogen-bonding receptors based on C-iodinated ortho-Carborane moieties. Following up on our results in solution, which indicated a second binding event for sub-stochiometric concentrations of halide guests, we herein present a systematic co-crystallization study with halides to further evaluate …
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Accès ouvert
2025
preprint
OpenAlex
Anna Schmidt, Dominik L. Reinhard, Elric Engelage, Stefan M. Huber
The coordination of allene dicarbonyl compounds to cyclic iodonium salts is presented as a new biaxial halogen bonding recognition motif. 1H¬ NMR titrations and isothermal titration calorimetry (ITC) of such adducts were performed, resulting in a binding constant as high as 6.9·10^5 …
de
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2025
article
OpenAlex
Saber Mehrparvar, Marcel Klinksiek, Richard M. Gauld, Julian Wolf et autres
The first study of the high-pressure behavior of organic halogen bond donors in solution is presented: HP-NMR titrations were performed in various solvents, primarily with a neutral tridentate halogen bond donor and an orthoamide or halides as Lewis bases. While the orthoamide …
de
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Accès ouvert
2025
article
OpenAlex
Julian Wolf, Meghana Poliyodath Mohanan, Raphaël Robidas, Revannath L. Sutar et autres
As the employment of "non-classical" non-covalent interactions like halogen bonding (XB) in asymmetric catalysis is still at a very early stage, there are significant challenges to overcome. In some reported cases, the relevance of halogen bonding to the catalytic action is unclear, …
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Accès ouvert
2025
article
OpenAlex
Julian Wolf, Meghana Poliyodath Mohanan, Raphaël Robidas, Revannath L. Sutar et autres
Zusammenfassung Da sich der Einsatz „nicht‐klassischer“ nicht‐kovalenter Wechselwirkungen wie der Halogenbrücken (XB) in der asymmetrischen Katalyse noch in einem sehr frühen Stadium befindet, gibt es noch erhebliche Herausforderungen zu überwinden. In einigen berichteten Beispielen ist die Bedeutung der Halogenbrücken für die katalytische …
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Accès ouvert
2025
article
OpenAlex
Dominik L. Reinhard, Anna Iniutina, Sven Reese, T. Shaw et autres
High Resolution Image Download MS PowerPoint Slide Halogen bonding has been established as a promising tool in organocatalysis. Asymmetric processes are nevertheless scarce, and their applications are limited to a few studies applying chiral halogen bond donors. Herein, we combine halogen bonding …
de
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Accès ouvert
2025
article
OpenAlex
Christoph J. Vonnemann, Elric Engelage, Jas S. Ward, Kari Rissanen et autres
Abstract Multidentate neutral halogen bonding catalysts based on iodinated icosahedral ortho ‐carborane moieties are introduced. Co‐crystallization‐studies, calorimetric measurements, and 1 H NMR titrations demonstrate their strong binding to halides and neutral compounds, further underlined by quantum‐chemical calculations. Thus, their superior Lewis acidity …
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Accès ouvert
2025
article
OpenAlex
Christoph J. Vonnemann, Elric Engelage, Jas S. Ward, Kari Rissanen et autres
Abstract Multidentate neutral halogen bonding catalysts based on iodinated icosahedral ortho ‐carborane moieties are introduced. Co‐crystallization‐studies, calorimetric measurements, and 1 H NMR titrations demonstrate their strong binding to halides and neutral compounds, further underlined by quantum‐chemical calculations. Thus, their superior Lewis acidity …
de, at, fi
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