Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment. Like 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. In a document type is Article, introducing its new discovery. Reference of 499-40-1
The C1-symmetrical cis-bis(Hdpa)Ru(II) complex, cis-[RuCl(Hdpa)2(dmso-S)]X (1·X; X = Cl or OTf, Hdpa = di-2-pyridylamine, dmso = dimethyl sulfoxide, OTf? = CF3SO3?), was synthesized and spectroscopically and crystallographically characterized. The crystal structures of 1·Cl and 1·(OTf) revealed that the Hdpa(N(4),N(6)) ligand was more planar with a near ideal bite angle compared with the Hdpa(N(1),N(3)) ligand. The two NH groups in 1+ were distinguishable in solution, and both NH groups could act as receptors for DMSO molecules or for Cl? and F? anion recognition via hydrogen bonding interactions. Among them, the reaction of 1+ with F? was noteworthy because of the obvious color change in the visible region. For 1·(OTf) in DMSO with TBAF, 1H NMR revealed that the F? adduct reaction with Hdpa ligands selectively and successively occurred in two steps. The NH group of the Hdpa(C,D) ligand, which was with a dmso-S ligand at the cis position of the two pyridine rings of itself and corresponds to the planar Hdpa(N(4),N(6)) ligand in the crystal structure, initially interacted with a F? anion to form [RuCl(F-Hdpa)(Hdpa)(dmso)] (mono-F-adduct-1). Then, the NH group of the remaining Hdpa(A,B) ligand also interacted with a F? anion to form [RuCl(F-Hdpa)2(dmso)]? (di-F-adduct-1). When excessive Li(OTf) was added to the mono- or di-F-adduct-1 solution, the solution turned yellow, suggesting that the adducted F? anion was removed by the Li+ ion to form 1+ and LiF.
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., Reference of 499-40-1
Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics