This article provides a comprehensive identification of N,N-Dimethylaniline (CAS 121-69-7), a widely used organic compound. It covers various aspects of its identification, including its chemical structure, physical properties, spectroscopic analysis, and practical applications. The article aims to serve as a reference for chemists and researchers in the field of organic chemistry.
N,N-Dimethylaniline, with the chemical formula C8H11N, is an aromatic amine commonly used in the synthesis of pharmaceuticals, dyes, and other organic compounds. It is identified by its CAS number 121-69-7 and is recognized for its distinctive chemical and physical properties. This article delves into the detailed identification of N,N-Dimethylaniline, providing insights into its characteristics and applications.
N,N-Dimethylaniline is an aromatic amine derived from aniline, where two methyl groups (-CH3) are substituted on the nitrogen atom. This substitution results in a molecule with a molecular weight of 121.18 g/mol. The chemical structure of N,N-Dimethylaniline is represented as follows:
The presence of the aromatic ring and the methyl groups contributes to the compound's solubility in organic solvents and its reactivity in various chemical reactions.
N,N-Dimethylaniline is a colorless to pale yellow liquid with a characteristic odor. It has a melting point of approximately 6.5°C and a boiling point of around 170°C. The compound is slightly soluble in water but highly soluble in organic solvents such as ethanol, ether, and chloroform. These physical properties are crucial for its identification and handling in laboratory settings.
Spectroscopic techniques are essential for the identification and characterization of N,N-Dimethylaniline. The following spectroscopic methods are commonly used:
- **Infrared Spectroscopy (IR):** The IR spectrum of N,N-Dimethylaniline shows characteristic peaks corresponding to the aromatic ring (1600-1500 cm-1) and the amine group (3300-3500 cm-1). The presence of these peaks confirms the presence of the aromatic ring and the amine functional group.
- **Nuclear Magnetic Resonance (NMR) Spectroscopy:** The 1H NMR spectrum of N,N-Dimethylaniline reveals signals corresponding to the aromatic hydrogen atoms (7.0-7.5 ppm) and the methyl groups (2.0-2.5 ppm). The integration of these signals confirms the presence of the aromatic ring and the methyl groups.
- **Mass Spectrometry (MS):** The MS spectrum of N,N-Dimethylaniline shows a molecular ion peak at m/z 121, which corresponds to the molecular weight of the compound. Additionally, fragmentation peaks corresponding to the loss of the methyl groups and the aromatic ring are observed.
N,N-Dimethylaniline finds extensive use in various industries due to its unique chemical properties. Some of the practical applications include:
- **Pharmaceuticals:** N,N-Dimethylaniline is used as a precursor in the synthesis of pharmaceuticals, including analgesics, antipyretics, and local anesthetics.
- **Dyes and Pigments:** The compound is employed in the production of dyes and pigments, particularly in the textile and printing industries.
- **Agricultural Chemicals:** N,N-Dimethylaniline is used in the synthesis of agricultural chemicals, such as herbicides and fungicides.
In conclusion, N,N-Dimethylaniline (CAS 121-69-7) is a versatile organic compound with a wide range of applications. Its identification is crucial for its safe handling and utilization in various industries. This article has provided a detailed overview of the identification of N,N-Dimethylaniline, covering its chemical structure, physical properties, spectroscopic analysis, and practical applications. Understanding these aspects is essential for chemists and researchers working with this compound.
N,N-Dimethylaniline, CAS 121-69-7, chemical structure, physical properties, spectroscopic analysis, practical applications, aromatic amine
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