Abstract
X-ray diffraction study confirmed that the matter under study is 3-(N-methylamino )-2H-1-benzopyran-2-one rather than 2-(N-methylamino)-1,3-indandione. The former crystallizes in the monoclinic system, space group P21/c, unit cell parameters a = 7.076(3) Å, b = 10.334(3) Å, c = 11.757(3) Å, β = 103.14(3)°, V = 837.2 Å3. The structure was solved by direct methods and refined to the final R = 0.042.
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References
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Acknowledgment
The authors wish to thank Professor P. Hrnčiar and co-workers for supplying crystals of 3-(N-methylamino)-2H-1-benzopyran-2-one.
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Głowiak, T., Gyepes, E. 2-(N -methylamino )-1,3-indandione or 3-(N-methylamino )-2H -1-benzopyran-2-one. J Chem Crystallogr 27, 71–73 (1997). https://doi.org/10.1007/BF03543090
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DOI: https://doi.org/10.1007/BF03543090