N,N-Dimethylformamide - C3H7NO
N,N-Dimethylformamide For Sale, Most Competitive Price, Fast Delivery, Custom Service, Wholesale N,N-Dimethylformamide, Made in China, High Quality Products!, China DMF, N,N-dimethylformide Supplier, Manufacturer.CAS No.: 68-12-2
Molecular Formular: C3H7NO
Molecular Weight: 73.09
Property:
Due to the contribution of the two possible resonance structures of an amide, the bond order of the carbonyl C=O bond is reduced, while that of the carbon-nitrogen bond is increased. Thus the infrared spectrum of DMF shows a lower C=O stretching frequency at 1675 cm than an unsubstituted C=O bond. Also, because of the partial double bond character, the rotation about the C-N axis is slow at room temperature, making the two methyl groups inequivalent on the NMR time scale, giving rise to two singlets of 3 protons each at δ 2.97 and 2.88, instead of one singlet of 6 protons in the proton NMR spectrum.
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