3-(4-Nitrobenzyl)-4<i>H</i>-chromen-4-one
Gopaul, Kaalin; Koorbanally, Neil Anthony; Shaikh, Mahidansha M.; Ramjugernath, Deresh; Su, Hong; Acta Crystallographica Section E 69 (2013) o513–; doi:10.1107/S1600536813006119

data_2237613
_publ_section_title
;
 3-(4-Nitrobenzyl)-4<i>H</i>-chromen-4-one
;
_journal_coeditor_code           FJ2618
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o513
_journal_paper_doi               10.1107/S1600536813006119
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C16 H11 N O4'
_chemical_formula_moiety         'C16 H11 N O4'
_chemical_formula_sum            'C16 H11 N O4'
_chemical_formula_weight         281.26
_chemical_name_systematic
;
3-(4-Nitrobenzyl)-4<i>H</i>-chromen-4-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 92.845(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.9246(9)
_cell_length_b                   10.0160(19)
_cell_length_c                   25.907(5)
_cell_measurement_reflns_used    3303
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.42
_cell_measurement_theta_min      1.57
_cell_volume                     1276.3(4)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEX2 (Bruker, 2006)'
_computing_data_reduction        'SAINT (Bruker, 2006)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 2012)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker Kappa DUO APEXII'
_diffrn_measurement_method       '0.5\% \f scans and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0634
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            87638
_diffrn_reflns_theta_full        27.42
_diffrn_reflns_theta_max         27.42
_diffrn_reflns_theta_min         1.57
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  0.9915
_exptl_absorpt_correction_T_min  0.9636
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(TWINABS; Sheldrick, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.464
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.253
_refine_diff_density_min         -0.228
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         3303
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0585
_refine_ls_R_factor_gt           0.0504
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0779P)^2^+0.7278P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1483
_refine_ls_wR_factor_ref         0.1538
_reflns_number_gt                2887
_reflns_number_total             3303
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            fj2618.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2237613
_cod_database_fobs_code          2237613