The one-pot synthesis of quinazoline-2,4-diones was developed in the presence of 4-dimethylaminopyridine (DMAP) by metal-free catalysis. ... 1 H and 13 C NMR spectra were recorded on a Varian 400 or ...

Studies on the NMR methodology for characterizing the structure of polymers and biopolymers based on the understanding of the NMR chemical shift/structure correlation using solution-state and ...

Learn how to interpret ¹H and ¹³C NMR spectroscopy results with this beginner-friendly guide. Understand chemical shifts, splitting patterns, integration, and structural analysis techniques.

Spiro-annulation involving δ-acetoxy allenoate and alkyl benzoisothiazole dioxide (N-sulfonyl ketimine) triggered by DABCO/MeCO2H combination leads to an essentially single diastereomer via chemo- and ...

The chemical synthesis of an NMR probe combines the advantages of four different nuclei, 1 H, 2 H, 13 C and 19 F, to achieve optimal resolution for these larger systems. Yun Huang David Eliezer ...

After a pair of carbon plate running shoes to help you smash your marathon PB? Here's our pick of the best carbon running shoes for long-distance racing.

The Royal Society of Chemistry NMR Discussion Group (NMRDG) is pleased to announce its annual postgraduate meeting, to be held at University College London on 16-17 June 2025. This gathering brings ...

Carbon monoxide—that invisible, odorless silent killer—could be a risk in your hotel room. Unfortunately there’s no real way of knowing how protected you are unless you take precautions.

X射线衍射显示两种配合物中卟啉大环均呈现显著褶皱变形，DMAP配体采取垂直取向排列。EPR谱呈现典型菱形信号，结合 1 H NMR数据证实电子排布为(d xy) 2 (d xz d yz) 3 构型，符合高碱性轴向配体特征。 【电化学传感性能】 ...

Ireland’s national Designated Maritime Area Plan (DMAP) for offshore wind is to be developed by the Department of Climate, Environment and Energy, to identify optimum sites for wind energy ...

Microsoft’s carbon footprint has grown 23.4% since the software and cloud giant set a goal in 2020 to shrink its climate emissions to zero within a decade. But while that sizeable increase is ...

"He's going to hide the consumer carbon tax for 60 days, and if he's re-elected, he'll bring it back bigger than ever, with no rebate." In March, Carney used a regulation to set the price of the ...