The transformation of simple hydrocarbons into more complex and valuable products has revolutionised modern synthetic chemistry. This type of reactivity has quickly become one of the cornerstones of modern catalysis . 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a Article，once mentioned of 499-40-1, Synthetic Route of 499-40-1
Four heterotrinuclear strings of metal atoms stabilized by dipyridylamide (dpa-) ligands were synthesized and characterized. The metal frameworks of Ru2Cu(dpa)4Cl2 (1), its monooxidized counterpart [Ru2Cu(dpa)4Cl 2]PF6 (2), and their nickel homologues, Ru 2Ni(dpa)4Cl2 (3) and [Ru2Ni(dpa) 4Cl2]-PF6 (4), were shown by X-ray diffraction to be nonsymmetric, in spite of a severe disorder affecting the metal positions. The metal string is composed of a Ru dimer with a short Ru-Ru bond that is completed with the heterometal at a longer distance from the central ruthenium atom. This nonsymmetric structure was confirmed from NMR spectroscopy. The [Ru2M]6+ framework of 1 and 3 was shown from spectroelectrochemical analysis and DFT calculations to exist in the form of a mixed-valent [Ru2]5+ moiety coupled to a formally M + heterometal. The temperature-dependant magnetic susceptibility of these compounds is reported and interpreted by means of a model previously applied to [Ru2]5+ complexes. The redox chemistry of 1 and 3 was investigated by cyclic voltammetry, and the electronic structure of the mono- and dioxidized species was assigned from the observed changes in the UV/Vis spectra and from DFT calculations. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 499-40-1 is helpful to your research., Synthetic Route of 499-40-1
Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics