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● Molecular Structure of Procaine
● Chemical Environment Influence on NMR Signals
● Importance of NMR Analysis for Procaine
● Frequently Asked Questions (FAQ)
>> 1. How many hydrogen NMR signals does Procaine typically show?
>> 2. How many carbon NMR signals are present in Procaine?
>> 3. Why are there fewer NMR signals than total hydrogens or carbons in Procaine?
>> 4. What is the role of NMR in Procaine manufacturing quality control?
>> 5. Can your factory provide NMR analysis for OEM Procaine production?
Procaine, an ester local anesthetic commonly used in medical, pharmaceutical, and dental applications, plays a vital role in pain management due to its fast-acting and effective anesthetic properties. As a derivative of para-aminobenzoic acid, Procaine exhibits a well-defined chemical structure that can be thoroughly analyzed using Nuclear Magnetic Resonance (NMR) spectroscopy. For researchers, chemists, and quality assurance professionals, understanding and identifying NMR signals in Procaine is essential for validating molecular structure, assessing purity, and controlling production quality in pharmaceutical manufacturing.
This article comprehensively explores how many NMR signals Procaine exhibits in both its proton (1H) and carbon (13C) spectra. It discusses the molecular structure influencing signal count, the interpretation of chemical environments, and practical implications of these signals in research and industry. This content is invaluable for international buyers, pharmaceutical developers, and foreign brand partners interested in high-quality OEM production of Procaine.
NMR spectroscopy is a non-destructive technique based on the magnetic properties of atomic nuclei, especially hydrogen (1H) and carbon (13C). When molecules are exposed to an external magnetic field, nuclei in distinct chemical environments absorb and re-emit radiofrequency energy at characteristic frequencies, producing an NMR spectrum.
- 1H NMR specifically investigates hydrogen atoms within different molecular environments.
- 13C NMR reveals information about carbon atoms.
The number of distinct signals in these spectra corresponds directly to the number of chemically unique hydrogen or carbon atoms. Symmetry or equivalence in the molecule can reduce the number of observed signals.
Procaine's chemical formula isC13H20N2O2. The molecule features three key parts that influence its NMR signals:
1. Aromatic Benzene Ring: The para-substituted benzene ring typically results in fewer signals because hydrogens and carbons in symmetric positions are equivalent.
2. Ester Group: The ester linkage influences nearby atoms' electronic environment, shifting signals in both 1H and 13C NMR spectra.
3. Aminoethyl Side Chain: Contains alkyl groups, nitrogen, and hydrogens in distinct environments producing unique NMR signals.
Understanding the 3D chemical structure is essential to comprehensively interpret the NMR spectra of Procaine.
Procaine usually exhibits about 9 to 10 distinct 1H NMR signals. The breakdown of these signals can be understood as follows:
- Aromatic Protons (4 signals): Due to para substitution, the benzene ring hydrogens split into two pairs of equivalent protons, giving two sets of signals, often appearing as doublets or multiplets due to coupling.
- Methylene Protons (CH2) adjacent to Nitrogen (2 signals): The protons near the amino group have distinctive environments producing separate signals.
- Methylene Protons adjacent to Ester Oxygen (1 signal): This environment produces a shifted peak due to the electronegativity of oxygen.
- Methyl Protons (CH3) (1-2 signals): Alkyl methyl groups appear around 1-2 ppm and typically create singlets or triplets depending on coupling.
- Amine-Associated Protons: Protons on the amino group may be less distinct or broad due to exchange effects.
The aromatic region usually appears between 6.5–8 ppm, whereas aliphatic protons resonate in the 0.5–4 ppm range.
- Aromatic hydrogens: 4 protons split into 4 separate peaks considering symmetry
- CH2 next to nitrogen: 2 protons in two different environments give two distinct signals
- CH2 next to oxygen: 2 protons giving one signal
- CH3 groups in side chain: possibly two types of methyl hydrogens appearing distinctly
The 13C NMR spectrum of Procaine contains about 10 to 12 distinct carbon signals due to overlaps caused by symmetry and equivalent carbons. Here's a summarized breakdown:
- Aromatic Carbons (6 carbons): The benzene ring has 6 carbons, but due to para substitution symmetry, typically fewer than 6 unique peaks are observed, usually 4 to 5 signals.
- Carbonyl Carbon (Ester Group) (1 signal): Appears downfield around 160-180 ppm, distinct due to deshielding.
- Carbons in Aminoethyl Side Chain (3-4 signals): The carbons linked to nitrogen and oxygen groups give separate signals in the 20-70 ppm range.
Chemical shifts vary based on neighboring electronic effects, so precise chemical shifts are characteristic fingerprints to confirm Procaine's structure in quality control.
NMR signals depend fundamentally on the chemical environment of each nucleus:
- Atoms in equivalent environments produce a single signal.
- Symmetry in the Procaine molecule reduces the total number of unique signals because equivalent atoms resonate identically.
- Electronegative atoms such as oxygen or nitrogen nearby affect the electronic environment causing shifts in signal positions.
- Spin-spin coupling between adjacent nuclei causes peak splitting patterns, valuable for structural elucidation.
These factors result in fewer NMR signals than the molecule's number of hydrogens or carbons.
NMR spectroscopy is indispensable in research and pharmaceutical manufacturing for Procaine due to:
- Structural Confirmation: Ensures the molecule matches specifications by identifying all key chemical environments.
- Purity Testing: Detects synthesis impurities or degradation products that appear as additional signals.
- Batch Consistency: Confirms uniformity across production lots, vital for OEM clients and regulatory compliance.
- Research & Development: Aids in formulation studies, interaction analysis with excipients, and derivative design.
By employing NMR characterization, manufacturers assure superior product quality and safety, reinforcing client trust in global markets.
Procaine typically exhibits around 9 to 10 distinct 1H NMR signals and 10 to 12 distinct 13C NMR signals deriving from its molecular symmetry and diverse chemical environments. These NMR profiles provide critical confirmation of Procaine's identity and purity, essential for pharmaceutical research and manufacturing quality control.
For foreign brand owners, wholesalers, or pharmaceutical producers seeking reliable OEM partners, our factory offers professional Procaine manufacturing with stringent quality control, including advanced NMR characterization services. Contact us for customized OEM solutions that ensure consistent supply and market competitiveness.
Procaine exhibits approximately 9 to 10 distinct 1H NMR signals, reflecting the unique proton environments within its molecular structure.
Typically, Procaine's 13C NMR spectrum displays about 10 to 12 distinct carbon signals due to symmetry and electronic environment differences.
Equivalent atoms in chemically and spatially identical environments produce the same NMR signals, reducing the total number observed.
NMR is used to verify molecular identity, detect impurities, and ensure batch consistency for high-quality pharmaceutical production.
Yes, we offer comprehensive NMR analytical support as part of our OEM manufacturing services to ensure product purity and regulatory compliance.
[1](https://hmdb.ca/spectra/nmr_one_d/153195)
[2](https://pubmed.ncbi.nlm.nih.gov/3496115/)
[3](https://pubs.acs.org/doi/10.1021/acs.jced.4c00743)
[4](https://www.sciencedirect.com/science/article/abs/pii/0005273669901618)
[5](https://www.nature.com/articles/223747a0)
[6](https://pubchem.ncbi.nlm.nih.gov/compound/Procaine)
[7](https://www.chemicalbook.com/SpectrumEN_51-05-8_1HNMR.htm)
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