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Related Concept Videos

meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H01:13

meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H

All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for the...
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Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
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Nonsense-mediated mRNA Decay

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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
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P-value

P-value is one of the most crucial concepts in statistics.
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Three Force Member

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NdO(NO(3)).

Ya-Feng Li1, Li Jin, Dan-Ping Li

  • 1School of Chemical Engineering, Changchun University of Technology, Changchun 130012, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

Neodymium(III) oxide nitrate, a novel compound, was synthesized using a solvothermal method. Its crystal structure features a ten-coordinated neodymium ion forming a 3D framework of NdO(10) polyhedra.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Materials Science

Background:

  • Neodymium(III) oxide nitrate is a novel inorganic compound.
  • Lanthanum oxide nitrate (LaO(NO3)) serves as a structural reference.

Purpose of the Study:

  • To synthesize and characterize neodymium(III) oxide nitrate.
  • To elucidate the crystal structure and coordination environment of the neodymium ion.

Main Methods:

  • Solvothermal synthesis.
  • Single-crystal X-ray diffraction analysis.

Main Results:

  • The title compound, neodymium(III) oxide nitrate, was successfully synthesized via solvothermal reaction.
  • The neodymium ion (Nd) exhibits ten-coordination, bonded to eight oxygen atoms from nitrate groups and two μ(2)-oxide ions.
  • A three-dimensional crystal structure is formed through the interconnected NdO(10) polyhedra.

Conclusions:

  • Neodymium(III) oxide nitrate is isostructural with LaO(NO3).
  • The study provides detailed insights into the coordination chemistry and structural architecture of this neodymium compound.