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Saturday 22 November 2014

Proton NMR Spectrum of 1,2-dichloropropane




Proton NMR Spectrum of 1,2-dichloropropane

Proton NMR spectrum of 1,2-dichloropropane shows distinct absorptions for the methylene protons on C1. These hydrogen atoms are diastereotopic and are chemically non-equivalent.

Diastereotopic protons will give different signals in the spectrum.


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Diastereomerism also occurs in saturated acyclic compounds; for example, 1,2-dichloropropane is a simple compound that contains diastereotopic protons. The two protons on the -CH2Cl group are diastereotopic; their imaginary replacement give diastereomers.

Diastereotopic protons are usually vicinal to stereocenters (chiral carbons).



Diastereotopic Protons in Cyclic Compounds

Protons He and Hf are diastereotopic because Hc is cis to the hydroxyl group, while Hf is trans. Across the internal plane of symmetry, protons Hc are cis to the hydroxyl group and protons Hd are trans to the hydroxyl group. Protons Hc and Hd are diastereotopic and capable of splitting each other.

Diastereotopic protons will split each other but enantiotopic protons will not split each other.














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Khajuraho Group of Monuments is located in India
Khajuraho Group of Monuments
Location of Khajuraho Group of Monuments in India.

Location in Madhya PradeshLocation in Madhya Pradesh
INDIA
  1. Khajuraho Group of Monuments - Wikipedia, the free ...

    en.wikipedia.org/wiki/Khajuraho_Group_of_Monuments

    The Khajuraho Group of Monuments are a group of Hindu and Jain temples in Madhya Pradesh, India. About 620 kilometres (385 mi) southeast of New Delhi, ...























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