Chemistry is a science major with cience and engineering. The main research directions are chemical synthesis, new energy materials, preparation and modification of special coatings, and research on the structure and performance of functional materials81025-04-9, Name is Lactitol monohydrate, molecular formula is C12H26O12. In a Article，once mentioned of 81025-04-9, COA of Formula: C12H26O12
Crystallization of lactitol from aqueous ethanol readily yields crystals of the monohydrate, the structure of which has recently been reported.Slow evaporation of very concentrated aqueous syrups results in the crystalline dihydrate.The space group is P43212 with a=8.762(2), c=45.508(8) Angstroem, V=3493.8(13) Angstroem3, Z=8, Dc=1.446 g cm-1, R=0.037 for 2017 unique observed reflections and 310 variables.The galactopyranosyl ring has the 4C1 chair conformation and the carbon chain of the glucitol fragment has a non-planar, bent MAA conformation.Theconformations about the glycosidic C(1)-O(1) and O(1)-C(14) bonds are different from those observed in the monohydrate: the torsion angles O(5)-C(1)-O(1)-C(14) and C(1)-O(1)-C(14)-C(13) differ by 29.6 deg and 15.0 deg, respectively.The orientations of the terminal C(11)-O(11) bonds with respect to the carbon-atom chain of the glucitol fragment also differ appreciably: in the dihydrate the pertinent torsion angle is -47.3(3) deg and in the monohydrate 75.5(2) deg.All hydroxyl groups are involved in a complex three-dimensional system of hydrogen bonds, in which the two water molecules constitute an important cohesive element.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics