Crystal structure of methyl 2,7,7-trimethyl-4-(4-nitrophenyl)-5-oxo-1,4,5,6,7,8-hexahydro-quinoline-3-carboxylate, C20H22N2O5
Meng, Jing; Zhou, Hai-Yu; Sui, Feng; Zeitschrift für Kristallographie - New Crystal Structures 232 (2017) 527–528; doi:10.1515/ncrs-2016-0282

data_8106593
_publ_section_title
;
 Crystal structure of methyl
 2,7,7-trimethyl-4-(4-nitrophenyl)-5-oxo-1,4,5,6,7,8-hexahydro-quinoline-3-carboxylate,
 C20H22N2O5
;
_journal_issue                   4
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              527
_journal_page_last               528
_journal_paper_doi               10.1515/ncrs-2016-0282
_journal_volume                  232
_journal_year                    2017
_chemical_formula_sum            'C20 H22 N2 O5'
_chemical_formula_weight         370.39
_space_group_crystal_system      tetragonal
_space_group_IT_number           114
_space_group_name_Hall           'P -4 2n'
_space_group_name_H-M_alt        'P -4 21 c'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.624(6)
_cell_length_b                   16.624(6)
_cell_length_c                   14.385(6)
_cell_measurement_temperature    296(2)
_cell_volume                     3975(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0631
_diffrn_reflns_av_unetI/netI     0.0451
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            19627
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        24.992
_diffrn_reflns_theta_max         24.992
_diffrn_reflns_theta_min         1.872
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.090
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_description       block
_exptl_crystal_F_000             1568
_exptl_crystal_size_max          0.290
_exptl_crystal_size_mid          0.270
_exptl_crystal_size_min          0.250
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.326
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details
;
 Flack x determined using 825 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   2.2(9)
_refine_ls_extinction_coef       0.007(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     252
_refine_ls_number_reflns         3493
_refine_ls_number_restraints     248
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.0976
_refine_ls_R_factor_gt           0.0647
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1223P)^2^+0.2532P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1886
_refine_ls_wR_factor_ref         0.2119
_reflns_Friedel_coverage         0.792
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                2368
_reflns_number_total             3493
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            suppl_ncrs-2016-0282_suppl.cif
_cod_data_source_block           A
_cod_database_code               8106593
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.974
_shelx_estimated_absorpt_t_max   0.978
_shelx_res_checksum              13879
_shelx_hkl_checksum              23143