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
Synthetic Route of 499-40-1, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 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
Crystal Structure and Electronic Properties of Dibromo- and Dichlorotetrakistricopper(II) Hydrate
The crystal structures of *H2O (1) and *H2O (2) where bipyam-H = bis(2-pyridyl)amide, have been determined by X-ray analysis, in the orthorhombic space group Pnn2: (1), a=14.092(3), b=12.895(3), c=11.190(2) Angstroem, Z=2, and R=0.032 for 2453 observed and 2029 unique reflections; (2), a=14.186(3), b=13.040(3), c=11.313(2) Angstroem, Z=2, and R=0.043 for 1574 observed and 1465 unique reflections.The two structures are isomorphous with near isostructural units in special positions of two-fold symmetry and a non-co-ordinated water molecule.The Cu3N12X2 chromophores involve nearly linear Cu3 units, Cu-Cu-Cu 178.4 deg (mean), terminated by the two halide anions.The four separate bipyam-H ligands act as tridentate ligands, involving co-ordination to the three separate copper(II) ions, with Cu-Cu distances of 2.471(1) and 2.468(1) Angstroem, for (1) and (2), respectively.If the Cu-Cu separations are ignored, the central Cu atom in both structures involves a four-co-ordinate rhombic coplanar CuN4 chromophore generated by the central amido nitrogens of the four bipyam-H ligands.The two terminal Cu atoms involve a square-based pyramidal CuN4X chromophore, generated by the terminal pyridine nitrogens of the four bipyam-H ligands and an axial halide anion.An average dihedral angle of 48 deg is involved between the planes of the pyridine rings of the individual bipyam-H ligands, which results in a spiral configuration of the units.The spin-only magnetic moment of the complex (1) is ca. 1.40 B.M. per Cu atom, consistent with antiferromagnetic coupling between the copper(II) atoms of the trimer.Both complexes are e.s.r. silent, again consisitent with strong antiferromagnetic coupling.The electronic spectra of (1) and (2) have a band maximum at 15500 cm-1, with a high-energy shoulder at 19230 cm-1, consistent with the two different stereochemistries present.
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£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics