<small>DL</small>-Methyl 4-(4-methoxyphenyl)-2,7,7-trimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate
Zhao, Jing-Min; Acta Crystallographica Section E 68 (2012) o745–; doi:10.1107/S1600536812005892

data_2233920
_publ_section_title
;
 <small>DL</small>-Methyl
 4-(4-methoxyphenyl)-2,7,7-trimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate
;
_journal_coeditor_code           LD2046
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o745
_journal_paper_doi               10.1107/S1600536812005892
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C21 H25 N O4'
_chemical_formula_moiety         'C21 H25 N O4'
_chemical_formula_sum            'C21 H25 N O4'
_chemical_formula_weight         355.42
_chemical_name_systematic
;
DL-Methyl 4-(4-methoxyphenyl)-2,7,7-trimethyl-5-oxo-
1,4,5,6,7,8-hexahydroquinoline-3-carboxylate
;
_space_group_IT_number           114
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 2n'
_symmetry_space_group_name_H-M   'P -4 21 c'
_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                   16.058(2)
_cell_length_b                   16.058(2)
_cell_length_c                   14.343(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      9
_cell_volume                     3698.5(10)
_computing_cell_refinement       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_collection       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1996)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_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  0.0689
_diffrn_reflns_av_sigmaI/netI    0.1191
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            6166
_diffrn_reflns_theta_full        25.41
_diffrn_reflns_theta_max         25.41
_diffrn_reflns_theta_min         1.79
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9913
_exptl_absorpt_correction_T_min  0.9826
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
For Semi-empirical absorption, see: (North <i>et al.</i>, 1968).
;
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1520
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_platon_squeeze_details
;
?
;
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.186
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         3353
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1470
_refine_ls_R_factor_gt           0.0663
_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^)+(0.0600P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1293
_refine_ls_wR_factor_ref         0.1607
_reflns_number_gt                1856
_reflns_number_total             3353
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ld2046.cif
_cod_data_source_block           I
_cod_original_cell_volume        3698.5(11)
_cod_original_sg_symbol_H-M      'P -4 21c'
_cod_database_code               2233920
_cod_database_fobs_code          2233920