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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, belongs to Tetrahydropyrans compound, is a common compound. In an article, authors is Aduldecha, Sujittra, once mentioned the new application about 499-40-1.499-40-1
Crystal Structure and Electronic Properties of Tetrakisdichlorotrinickel(II)-Water-Acetone (1/0.23/0.5)
The crystal structure of *0.23H2O*0.5(CH3)2CO 1 has been determined using X-ray diffractometer data; C41.5H35.5Cl2N12Ni3O0.75’monoclinic, space group C2/c, with a = 37.525(7), b = 16.237(3), c = 22.550(6) Angstroem, beta = 110.12(2), Z = 12; 5778 measured and 5519 unique reflections gave a final R value of 0.051.The structure involves two independent Ni3(bipyam-H)4Cl2 units, (1) and (2) <(1) occupies a general position and (2) is on a C2 axis>, one non-co-ordinated water molecule , and one acetone molecule (s.o.f. 0.5).The Ni3N12Cl2 chromophores of (1) and (2) involve a nearly linear Ni3 unit, mean Ni-Ni-Ni angle 178.4(1) deg, terminated by the two chloride anions.The four separate bipyam-H ligands act as tridentate ligands, involving co-ordination to three separate nickel(II) ions with Ni-Ni distances 2.443(1) (twice) and 2.431(1) Angstroem for units (1) and (2), respectively.If the Ni-Ni separations are ignored the central Ni atom in both units involves a four-co-ordinate rhombic coplaner NiN4 chromophore, generated by the four central amido nitrgens of the bipyam-H ligands.The two terminal Ni atoms involve a square-based pyramidal NiN4Cl chromophore, involving the four pyridine nitrogens of the bipyram-H ligands and an axial Cl atom.A dihedral angle of ca. 54 deg is involved between the planes of the individual pyridine rings of each bipyam-H ligand and results in a spiral configuration in the Ni3(bipyram-H)4Cl2 unit.The room-temperature magnetic moment mueff of compound 1 is 2.46, consistent with a diamagnetic central NiN4 chromophore and two paramagnetic terminal NiN4Cl chromophores.The electronic spectrum involves a low-energy peak at 6500 cm-1, an intense peak at 17700 cm-1, and a low-intensity shoulder at 10800 cm-1, consistent with the two nickel(II) stereochemistries present.
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Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics