<i>rac</i>-4-(4-Chlorophenyl)-2-methylamino-3-nitro-5,6,7,8-tetrahydro-4<i>H</i>-chromen-5-one
Narayanan, P.; Kamalraja, Jayabal; Perumal, Paramasivam T.; Sethusankar, K.; Acta Crystallographica Section E 69 (2013) o1053–o1054; doi:10.1107/S1600536813014530

data_2238206
_publ_section_title
;
 <i>rac</i>-4-(4-Chlorophenyl)-2-methylamino-3-nitro-5,6,7,8-tetrahydro-4<i>H</i>-chromen-5-one
;
_journal_coeditor_code           LD2104
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1053
_journal_page_last               o1054
_journal_paper_doi               10.1107/S1600536813014530
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C16 H15 Cl N2 O4'
_chemical_formula_moiety         'C16 H15 Cl N2 O4'
_chemical_formula_sum            'C16 H15 Cl N2 O4'
_chemical_formula_weight         334.75
_chemical_name_systematic
<i>rac</i>-4-(4-Chlorophenyl)-2-methylamino-3-nitro-5,6,7,8-tetrahydro-4<i>H</i>-chromen-5-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           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.067(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.0285(4)
_cell_length_b                   10.8460(5)
_cell_length_c                   18.2337(9)
_cell_measurement_reflns_used    2208
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.19
_cell_volume                     1583.74(13)
_computing_cell_refinement       'APEX2 (Bruker, 2008)'
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 2012)'
_computing_publication_material
;
SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEXII CCD'
_diffrn_measurement_method       '\w and \f 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  0.0290
_diffrn_reflns_av_sigmaI/netI    0.0235
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            11848
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    0.263
_exptl_absorpt_correction_T_max  0.924
_exptl_absorpt_correction_T_min  0.912
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.404
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.324
_refine_diff_density_min         -0.279
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         2786
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0586
_refine_ls_R_factor_gt           0.0424
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0482P)^2^+0.9511P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1054
_refine_ls_wR_factor_ref         0.1189
_reflns_number_gt                2208
_reflns_number_total             2786
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ld2104.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2238206
_cod_database_fobs_code          2238206