Migrating charges unlock hard-to-reach C-H bond edits in organic molecules
Researchers at the University of Vienna have developed a method called 'cation sampling' to precisely modify carbon-hydrogen bonds in organic molecules. By controlling reaction temperatures and using specific functional groups, the team can target previously inaccessible sites without the need for complex transition-metal catalysts.
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Read the original article: https://phys.org/news/2026-05-migrating-hard-bond-molecules.html
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fact_checkFact-Check Results
8 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.
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Single Source
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Corroborated
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“A team at the University of Vienna, led by chemist Nuno Maulide, has developed a new method for controlling chemical reactions in a more targeted and efficient manner.”
CORROBORATED
Two independent web search results (Newswise and another news source) explicitly state that a team at the University of Vienna led by Nuno Maulide developed a method for controlling chemical reactions in a more targeted and efficient manner.
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NEUTRAL
— A team at the University of Vienna, led by chemist Nuno Maulide, has developed a groundbreaking method for controlling chemical reactions in a more targeted and efficient manner.
https://www.newswise.com/articles/controlling-chemical-react…
https://www.newswise.com/articles/controlling-chemical-react…
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NEUTRAL
— A team of chemists from the University of Vienna, led by Nuno Maulide, has achieved a significant breakthrough in the field of chemical synthesis, developing a novel method for manipulating carbon-hyd…
https://phys.org/news/2024-05-bonds-chemical-reaction-potent…
https://phys.org/news/2024-05-bonds-chemical-reaction-potent…
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NEUTRAL
— With "C-HANCE", Nuno Maulide and his team will explore the reactivity of positively charged carbon atoms. Under special conditions, they reveal surprising chemical behaviour through distant communicat…
https://www.itqb.unl.pt/news/nuno-maulide-receives-erc-advan…
https://www.itqb.unl.pt/news/nuno-maulide-receives-erc-advan…
“The method allows carbon-hydrogen bonds (C–H bonds) to be specifically modified.”
CORROBORATED
Multiple sources confirm the research involves manipulating or functionalizing carbon-hydrogen (C-H) bonds, specifically mentioning the team led by Nuno Maulide.
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— Carbon–hydrogen bonds have a bond length of about 1.09 Å (1.09 × 10−10 m) and a bond energy of about 413 kJ/mol (see table below). Using Pauling's scale—C (2.55) and H (2.2)—the electronegativity diff…
https://en.wikipedia.org/wiki/Carbon–hydrogen_bond
https://en.wikipedia.org/wiki/Carbon–hydrogen_bond
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NEUTRAL
— A team of chemists from the University of Vienna, led by Nuno Maulide, has achieved a significant breakthrough in the field of chemical synthesis, developing a novel method for manipulating carbon-hyd…
https://phys.org/news/2024-05-bonds-chemical-reaction-potent…
https://phys.org/news/2024-05-bonds-chemical-reaction-potent…
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NEUTRAL
— Nuno Maulide. A new internal, base-mediated redox-cyclisation reaction has been discovered and developed. In this transformation, the sacrificial reduction of an alkynyl moiety to an alkene allows dir…
https://www.researchgate.net/profile/Nuno-Maulide/3
https://www.researchgate.net/profile/Nuno-Maulide/3
“The study was published in the Journal of the American Chemical Society.”
SINGLE SOURCE
While the evidence confirms the existence of the Journal of the American Chemical Society, none of the provided search results explicitly link the specific study on 'cation sampling' to this journal.
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— The journal has absorbed two other publications in its history, the Journal of Analytical and Applied Chemistry and the American Chemical Journal. It covers all fields of chemistry.
https://en.wikipedia.org/wiki/Journal_of_the_American_Chemic…
https://en.wikipedia.org/wiki/Journal_of_the_American_Chemic…
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— 2. Study Area, Hydrogeological and Geological Settings The study area is Aduramigba Estate and its environs, it falls within the Southwestern part of Nigeria. Ido osun local government area of Osun st…
https://www.iiste.org/Journals/index.php/JEES/article/viewFi…
https://www.iiste.org/Journals/index.php/JEES/article/viewFi…
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— Journal of analytical and applied chemistry American chemical journal ISSN 0096-4085.Review of American chemical research. Publication Start Year: 1879. Frequency: Fifty one no. a year, 1993-. Country…
https://www.ncbi.nlm.nih.gov/nlmcatalog/7503056
https://www.ncbi.nlm.nih.gov/nlmcatalog/7503056
“Philipp Spieß, a former Ph.D. student in the Maulide group and one of the study's lead authors.”
SINGLE SOURCE
The provided evidence for this claim consists of irrelevant search results about the Mesa County Health Department; there is no mention of Philipp Spieß or the Maulide group.
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— Get Mesa County Health Department contact information in Grand Junction, CO, address on , map & directions, and other nearby Health Departments.
https://www.countyoffice.org/mesa-county-health-department-g…
https://www.countyoffice.org/mesa-county-health-department-g…
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— Mesa County Public Health, Grand Junction. 11,051 likes · 84 talking about this · 412 were here. Working to improve health through assessment of...
https://www.facebook.com/MesaCountyPublicHealth/
https://www.facebook.com/MesaCountyPublicHealth/
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— The Mesa County Health Department, located in Grand Junction, CO, monitors public health risks, coordinates Grand Junction agencies responding to public health threats, and enforces Colorado public he…
https://www.localoffices.org/health-departments/colorado/gra…
https://www.localoffices.org/health-departments/colorado/gra…
“Miloš Vavrík, a Ph.D. student in the Maulide group and co-first author of the paper.”
SINGLE SOURCE
The provided evidence for this claim consists of irrelevant search results regarding a hospital in Zhejiang, China; there is no mention of Miloš Vavrík or the Maulide group.
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NEUTRAL
— 开展项目几乎涵盖了小儿心脏、成人心脏，术中和床边心脏检查以及全身大血管超声检查。 科室各位资深专家具有丰富的临床经验，尤其在心脏疑难病例的超声诊断领域享有极高的声誉。
https://www.zy91.com/department/dept/73/53
https://www.zy91.com/department/dept/73/53
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— 擅长：各种介入性超声诊治，在国内较早开展肝脏超声造影、肝癌消融治疗、影像融合虚拟导航技术、纳秒脉冲电场消融、超声内镜下诊治技术等，对肝癌困难病例的消融治疗积累了丰富的临床经验。
https://m.youlai.cn/yyk/hospindex/2533/hospdeptexpert_19799.…
https://m.youlai.cn/yyk/hospindex/2533/hospdeptexpert_19799.…
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— 2015年成为国家级超声医学规培基地后，每年承担本院及外院的临床、影像等专业学生的规培教育工作以及超声专业人才的培养工作。 科室每年接纳省内外各家医院的超声专业和临床专业的进修人员近百人，与国内外多家医院建立了友好合作关系。
https://www.bohe.cn/hospital/31829/department/277194.html
https://www.bohe.cn/hospital/31829/department/277194.html
“the researchers can determine where on the molecule the reaction takes place—by simply controlling the reaction temperature.”
SINGLE SOURCE
The evidence provided discusses the general Arrhenius equation and temperature effects on enzymes, but does not confirm that this specific method by Maulide's team uses temperature to determine the reaction site.
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NEUTRAL
— In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates.This equation has a vast and important application in determining the rate of chemical react…
https://en.wikipedia.org/wiki/Arrhenius_equation
https://en.wikipedia.org/wiki/Arrhenius_equation
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— By altering the reaction's temperature, we can observe how it changes the enzyme's active site.Temperature has a great effect on the rate of enzyme activity. Generally, for every 10°C rise in temperat…
https://aithor.com/essay-examples/the-effect-of-temperature-…
https://aithor.com/essay-examples/the-effect-of-temperature-…
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— Temperature is one of the great determinants while conducting reaction experiments. An increase in temperature causes an increase in the rate of reaction of chemicals during experiments. This may be a…
https://ivypanda.com/essays/the-effect-of-temperature-on-amy…
https://ivypanda.com/essays/the-effect-of-temperature-on-amy…
“The method also does not require complex transition-metal catalysts, which are often needed in comparable processes.”
SINGLE SOURCE
One specific web result ('Regiodivergent cation sampling for distal Csp3-functionalization') describes the 'cation sampling' approach, but the provided evidence does not explicitly state that it avoids transition-metal catalysts; it only describes the mechanism.
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— In transition metals, there are greater horizontal similarities in the properties of the elements in a period in comparison to the periods in which the d orbitals are not involved. This is because in …
https://en.wikipedia.org/wiki/Transition_metal
https://en.wikipedia.org/wiki/Transition_metal
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— The method then developed required a determination of each of the possible stable surface crystal structures at its point of zero charge (pH). Each of these structures was then placed in the model to …
https://pubs.rsc.org/en/content/articlehtml/2026/ra/d6ra0038…
https://pubs.rsc.org/en/content/articlehtml/2026/ra/d6ra0038…
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— Herein, we present a conceptually distinct approach in which we leverage cationic olefin isomerization for regiodivergent Csp³–H functionalization, wherein the selectivity results from a ketone-assist…
https://chemrxiv.org/engage/chemrxiv/article-details/6894cbc…
https://chemrxiv.org/engage/chemrxiv/article-details/6894cbc…
“Philipp Spieß et al, Cation Sampling Enables Regiodivergent Distal Functionalization of Ketones, Journal of the American Chemical Society (2026). DOI: 10.1021/jacs.6c05299”
SINGLE SOURCE
The provided evidence for this claim consists of general definitions of 'paper' from Wikipedia and Amazon; it does not contain any information regarding the specific academic paper, its authors, date, or DOI.
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— Largely derived from lignocellulose, paper is created from a pulp dissolved into a slurry that is drained and dried into sheets. Different types of paper are defined by constituent fiber, paper pulp, …
https://en.wikipedia.org/wiki/Paper
https://en.wikipedia.org/wiki/Paper
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— Explore diverse paper products including recycled options, colored sheets, and specialty papers. Quality paper for all your printing projects.
https://www.amazon.com/paper/s?k=paper
https://www.amazon.com/paper/s?k=paper
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— Paper is a thin, flat material produced by the compression of fibers. The fibers are usually derived from pulp made from pulpwood trees (such as spruce), but they may also be prepared from such source…
https://www.newworldencyclopedia.org/entry/Paper
https://www.newworldencyclopedia.org/entry/Paper
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Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.