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Citation: Wang Zhe-Min, Guan Tie-Tang, Zhuang Hong-Hui. Crystal Structure of Soft X-Ray Analyzer Crystal——Octadecyl Hydrogen Maleate(OHM, C₂₂H₄₀O₄)[J]. Acta Physico-Chimica Sinica, ;1994, 10(05): 413-417. doi: 10.3866/PKU.WHXB19940508 shu

Crystal Structure of Soft X-Ray Analyzer Crystal——Octadecyl Hydrogen Maleate(OHM, C₂₂H₄₀O₄)

1.
Department of Chemistry, Fuzhou University, Fuzhou 350002; Fujian Insitute of Research on the Structure of Matter, Academia Sinica, Fuzhou 350002

Received Date: 12 November 1992
Available Online: 15 May 1994

The crystal structure of octadecyl hydrogen maleate was determined by Xray diffeaction method. C_(22)H_(40)O_4, Mr=368.56, triclinic, space group Pī, a=0.6833 (2), b=3.1662 (5), c=0.5392 (1) nm, α=90.63 (2), β=102.61 (2), γ=89.03 (2)°, V=1.1383 (5) nm. Z=2, Dc.=1.08 g·cm~(-3), F(000)=408, λ(Mo K_α) =0.071069 nm, μ(Mo K_α)=0.67 cm~(-1), final R=0.0465 for 1332 observations with I ≥3σ(I) and 240 variables. In the crystal OHM molecules form dimers via intermolecular hydrogen bonding between carboxyl groups. The long hydrocarbon chain of octadecyl is zigzag-like and the carbon atoms of this chain are basically coplanar. These dimers arrange along (101) plane to form a layer, then these layers stack along [010] to give the crystal structure. The van der Waals interaction intralayer is evidently larger than interlayer. On the base of the crystal structure some phenomena in the crystal growth of OHM were illustrated.
- Octadecyl hydrogen maleate,
- Crystal structure,
- Soft X-ray analyzer crystal
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Crystal Structure of Soft X-Ray Analyzer Crystal——Octadecyl Hydrogen Maleate(OHM, C22H40O4)

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Crystal Structure of Soft X-Ray Analyzer Crystal——Octadecyl Hydrogen Maleate(OHM, C₂₂H₄₀O₄)