title: 3-Acetyl-4-hy-droxy-6,7-dimethyl-2H-chromen-2-one.
abstract: In the title coumarin derivative, C(13)H(12)O(4), the 2H-chromene ring system is essentially planar [maximum deviation = 0.047 (1) Å]. An intra-molecular hydrogen bond is observed between the hy-droxy and the ketonic O atoms. In the crystal, pairs of inter-molecular C-H⋯O hydrogen bonds link inversion-related mol-ecules into dimers. Additional inter-molecular C-H⋯O hydrogen bonds further inter-connect these dimers into two-dimensional arrays incorporating R(2) (2)(9) ring motifs.
authors: Mohammad
authors: M
authors: Asad
authors: Chuan-Wei
authors: CW
authors: Oo
authors: Hasnah
authors: H
authors: Osman
authors: Jia Hao
authors: JH
authors: Goh
authors: Hoong-Kun
authors: HK
authors: Fun
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