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Related Concept Videos

ortho–para-Directing Deactivators: Halogens01:24

ortho–para-Directing Deactivators: Halogens

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Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H01:13

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

5.3K
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...
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Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

2.6K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
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¹³C NMR: ¹H–¹³C Decoupling01:04

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The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
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ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH301:11

ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3

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All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the...
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Descriptor: Synthetic Genomic Dataset With Diverse Ancestry (SynGen6).

Xinyue Wang1, Sitao Min2, Jaideep Vaidya2

  • 1Center for Applied Statistics and School of Statistics, Renmin University of China, Beijing 100872, China.

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Summary
This summary is machine-generated.

A new synthetic genomic dataset, SynGen6, enhances precision medicine by offering diverse ancestry representation. This balanced dataset supports equitable genomic research and benchmarking of new analytical methods.

Keywords:
All of Usdiverse subpopulationsgenomic analysissynthetic genomic data

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Genomic analysis drives precision medicine, but current datasets lack diversity, limiting equitable application across populations.
  • Existing genomic datasets often underrepresent non-European ancestries, hindering broad applicability and fair benchmarking of new methods.

Purpose of the Study:

  • To develop a synthetic genomic dataset (SynGen6) with balanced representation across six distinct populations.
  • To provide a resource for equitable genomic research and to enable fair benchmarking of novel analytical approaches.
  • To facilitate advancements in genomic data analysis by offering a diverse and representative dataset.

Main Methods:

  • Utilized the 'All of Us' dataset as a foundation for generating synthetic samples.
  • Employed principal component analysis (PCA) and epsilon-local differential privacy (LDP) to ensure genetic diversity and individual privacy.
  • Simulated phenotype vectors linked to significant single nucleotide polymorphisms (SNPs) and generated synthetic SNPs for data watermarking.

Main Results:

  • Created SynGen6, a synthetic dataset comprising 34,200 samples and 7,120 SNPs across six populations.
  • Incorporated simulated phenotypes and watermarking SNPs to enhance data utility and verification.
  • Generated synthetic relatives to support kinship inference and family-based genomic studies.

Conclusions:

  • SynGen6 provides a balanced and representative synthetic genomic dataset crucial for advancing equitable precision medicine.
  • The dataset and accompanying scripts facilitate the development and validation of genomic analysis tools across diverse populations.
  • This resource aims to fuel innovation in genomic data analysis and promote inclusivity in biomedical research.