Syntheses and Crystal Structures of (PySe)_2 and Bi_2(PySe)_6(HPySe=2-Pyridineselenol N-Oxide)

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The title compounds(PySe)2 1(HPySe=2-pyridineselenol N-oxide,(PySe)2= bis(2-pyridine-N-oxide) diselenide) and Bi2(PySe)6 2 were prepared by the reaction of 2-bromine-N-oxide with NaHSe and Bi(NO3)3·5H2O with HPySe,and the crystal structure of 2 was studied.Compound 2 crystallizes in the monoclinic space group P21/n with a=9.840(2),b=10.204(2),c=18.395(2),β=102.926(2)°,V=1800.0(5)3,Dc=2.2687 g/cm3,Z=2,the final R=0.0319 and wR=0.0646.The Bi atoms are coordinated by four selenium and four oxygen atoms from four PySe ligands to form a slightly distorted four-column geometry. The title compounds (PySe) 2 1 were prepared by the reaction of 2- (pyridyllenol N-oxide, PySe) 2 = bis bromine-N-oxide with NaHSe and Bi (NO3) 3-5H2O with HPySe, and the crystal structure of 2 was studied. Compound 2 crystallizes in the monoclinic space group p21 / n with a = 9.840 (2), b = 10.204 2 = c = 18.395 2, β = 102.926 (2) °, V = 1800.0 (5) 3, Dc = 2.2687 g / cm3, Z = 2, final R = 0.0319 and wR = 0.0646. Bi atoms are coordinated by four selenium and four oxygen atoms from four PySe ligands to form a slightly distorted four-column geometry.
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