Photochromism of o-Nitrophenyl-Substituted Oxazabicycles
Wen-Chung Lin; Ding-Yah Yang; Journal of Organic Chemistry 78 (2013) 11798–11806; doi:10.1021/jo401838n

data_4028790
_publ_section_title
;
 Photochromism of o-Nitrophenyl-Substituted Oxazabicycles
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              11798
_journal_page_last               11806
_journal_paper_doi               10.1021/jo401838n
_journal_volume                  78
_journal_year                    2013
_chemical_formula_moiety         'C18 H20 N2 O4'
_chemical_formula_sum            'C18 H20 N2 O4'
_chemical_formula_weight         328.36
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      61
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   11.6208(7)
_cell_length_b                   8.9292(6)
_cell_length_c                   31.995(2)
_cell_measurement_reflns_used    7524
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      25.991
_cell_measurement_theta_min      2.165
_cell_volume                     3319.9(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      297(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0280
_diffrn_reflns_av_sigmaI/netI    0.0157
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            17326
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.17
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9815
_exptl_absorpt_correction_T_min  0.9591
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   empirical
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.314
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.239
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.433
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         3261
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.433
_refine_ls_R_factor_all          0.0631
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0900P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1617
_refine_ls_wR_factor_ref         0.1728
_reflns_number_gt                2548
_reflns_number_total             3261
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo401838n_si_004.cif
_cod_data_source_block           wc013m
_cod_database_code               4028790