1-Methyl-3-(2-methylphenyl)-3a-nitro-1,2,3,3a,4,9b-hexahydrochromeno[4,3-<i>b</i>]pyrrole
Sundaramoorthy, S.; Sivakumar, N.; Bakthadoss, M.; Velmurugan, D.; Acta Crystallographica Section E 68 (2012) o1735–; doi:10.1107/S1600536812020338

data_2234929
_publ_section_title
;
 1-Methyl-3-(2-methylphenyl)-3a-nitro-1,2,3,3a,4,9b-hexahydrochromeno[4,3-<i>b</i>]pyrrole
;
_journal_coeditor_code           BT5906
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1735
_journal_paper_doi               10.1107/S1600536812020338
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C19 H20 N2 O3'
_chemical_formula_moiety         'C19 H20 N2 O3'
_chemical_formula_sum            'C19 H20 N2 O3'
_chemical_formula_weight         324.37
_chemical_name_systematic
;
1-Methyl-3-(2-methylphenyl)-3a-nitro-1,2,3,3a,4,9b-
hexahydrochromeno[4,3-<i>b</i>]pyrrole
;
_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                 97.605(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.8782(13)
_cell_length_b                   8.0447(6)
_cell_length_c                   23.4660(17)
_cell_measurement_reflns_used    1223
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.35
_cell_measurement_theta_min      1.35
_cell_volume                     3345.3(4)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker SMART APEXII area-detector'
_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  0.0301
_diffrn_reflns_av_sigmaI/netI    0.0290
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            30608
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.35
_diffrn_reflns_theta_min         1.35
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.983
_exptl_absorpt_correction_T_min  0.979
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1376
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.202
_refine_diff_density_min         -0.244
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     437
_refine_ls_number_reflns         8190
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0821
_refine_ls_R_factor_gt           0.0491
_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^)+(0.0745P)^2^+0.4617P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1259
_refine_ls_wR_factor_ref         0.1490
_reflns_number_gt                5303
_reflns_number_total             8190
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt5906.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2234929
_cod_database_fobs_code          2234929