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  • Küçük Resim Yok
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    3a-bromoperhydro-2,6a-epoxyoxireno[e][2]benzofuran
    (BLACKWELL PUBLISHING, 2007) Kosar, Basak; Karaarslan, Muhsin; Demircan, Aydin; Bueyuekguengoer, Orhan
    In the title compound, C8H9BrO3, the boat form of the six-membered ring is almost symmetrical with respect to the epoxy bridge. The two five-membered rings generated by the epoxy bridge of the six-membered ring adopt envelope conformations, whereas the third five-membered ring adopts a half-chair conformation. The refinement results suggest partial inversion twinning.
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    (3aR,6S,7aR)-7a-Bromo-2-[(4-methylphenyl)sulfonyl]-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole
    (WILEY-BLACKWELL, 2011) Kosar, Basak; Demircan, Aydin; Arslan, Hakan; Buyukgungor, Orhan
    In the title compound, C15H16BrNO3S, the boat form of the six-membered ring is almost symmetrical with respect to the epoxy bridge. The two five-membered rings generated by the epoxy bridge of the six-membered ring adopt envelope conformations, whereas the N-containing five-membered ring adopts a twisted conformation. In the crystal, molecules are linked by C-H...O hydrogen bonds.
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    5-bromo-10-oxa-3-thiatricyclo[5.2.1.0(1,5)]-dec-8-ene 3,3-dioxide
    (BLACKWELL PUBLISHING, 2006) Kosar, Basak; Gokturk, Ersen; Demircan, Aydin; Buyukgungor, Orhan
    In the title compound, C8H9BrO3S, the six-membered ring has a boat conformation, the two O-containing five-membered rings have envelope conformations and the tetrahydrothiophene ring has a twist conformation. The molecules are linked only by weak van der Waals interactions.
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    5-chloro-10-oxa-3-thiatricyclo[5.2.1.0(1,5)] dec-8-ene 3,3-dioxide
    (BLACKWELL PUBLISHING, 2006) Kosar, Basak; Gokturk, Ersen; Demircan, Aydin; Buyukgungor, Orhan
    The title compound, C8H9ClO3S, has been synthesized from 2( 2-chloroallylsulfanylmethyl) furan by intramolecular thermal cycloaddition. The boat form of the six-membered ring is almost symmetric with respect to the epoxy bridge, and the five-membered ring containing the S atom has an envelope conformation.
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    Crystal structure, spectroscopic investigations and quantum chemical calculation studies of (3aR,6S,7aR)-7a-bromo-6-methyl-2-[(4-methylphenyl)sulfonyl]-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole: A combined experimental and theoretical studies
    (ELSEVIER SCIENCE BV, 2016) Alasalvar, Can; Demircan, Aydin; Kosar, Basak; Pekacar, Ali Ihsan; Buyukgungor, Orhan
    The crystal structure and spectroscopic properties of (3aR,65,7aR)-7a-bromo-6-methyl-2-[(4-methylphenyl)sulfonyl]-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole were determined by X-ray diffraction, IR and (CNMR)-C-13 and H-1 NMR spectroscopytechniques. We investigate molecular and crystal structure of the new sulfonamide, which was derived from an environmental friendly cyclization reaction in water. This work allow to the development of a stereo-selective tandem allylamine isomerization/Diels Alder cyclo-addition sequence led to rapid assembly of complex nitrogen containing heterocycles. The molecular geometry from X-ray determination, vibrational frequencies and NMR shifts values of the title compound in the ground state have been calculated by using CAM-B3LYP and B3LYP methods with 6-311++G(d,p) basis sets. The calculated results show that the optimized geometry can well regenerate the crystal structure and theoretical vibrational frequencies and chemical shift data are in good agreement with experimental data. Besides, it is examined nonlinear optic properties, molecular electrostatic potential map and HOMO-LUMO orbitals of the molecule. (C) 2016 Elsevier B.V. All rights reserved.
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    tert-Butyl 3a-chloro-2-methylperhydro-2,6a-epoxy-oxireno[e] isoindole-5-carboxylate
    (INT UNION CRYSTALLOGRAPHY, 2007) Kosar, Basak; Karaarslan, Muhsin; Yildiz, Yasar Kemal; Demircan, Aydin; Buyukgungor, Orhan
    In the title compound, C14H2OClNO4, the molecules are linked only by weak van der Waals interactions, and the three five-membered rings adopt envelope conformations.
  • Küçük Resim Yok
    Öğe
    tert-butyl 3a-chloroperhydro-2,6a-epoxyoxireno[e]isoindole-5-carboxylate
    (INT UNION CRYSTALLOGRAPHY, 2007) Kosar, Basak; Karaarslan, Muhsin; Demir, Ibrahim; Bueyuekguengoer, Orhan
    In the title compound, C13H18ClNO4, the molecules are linked only by weak van der Waals interactions. The boat form of the six-membered ring is almost symmetric with respect to the epoxy bridge. The three five-membered rings adopt envelope conformations.