Dibutyl 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, Diisobutyl 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate and Di-<i>tert</i>-butyl 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
Rowan, K. R.; Holt, E. M.; Acta Crystallographica Section C 52 (1996) 2207–2212; doi:10.1107/S0108270196003551

data_2005414
_publ_section_title
;
 Dibutyl
 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate,
 Diisobutyl
 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
 and Di-<i>tert</i>-butyl
 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2207
_journal_page_last               2212
_journal_paper_doi               10.1107/S0108270196003551
_journal_volume                  52
_journal_year                    1996
_chemical_formula_moiety         'C23 H30 N2 O6'
_chemical_formula_sum            'C23 H30 N2 O6'
_chemical_formula_weight         430.5
_chemical_melting_point          92
_chemical_name_systematic
;
Dibutyl
2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90.
_cell_angle_beta                 101.56(1)
_cell_angle_gamma                90.
_cell_formula_units_Z            4
_cell_length_a                   11.358(4)
_cell_length_b                   16.352(6)
_cell_length_c                   12.999(5)
_cell_measurement_reflns_used    47
_cell_measurement_temperature    298
_cell_measurement_theta_max      12.674
_cell_measurement_theta_min      4.033
_cell_volume                     2365.3(15)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1991)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'XP (Siemens, 1990)'
_computing_structure_refinement  SHELXS86
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298
_diffrn_measurement_device       'Siemens P4 four-circle'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_monochromator  'highly oriented graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0568
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5197
_diffrn_reflns_theta_max         25.0
_diffrn_reflns_theta_min         1.75
_diffrn_standards_decay_%        1.0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.209
_exptl_crystal_description       chunk
_exptl_crystal_F_000             920
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.16
_refine_diff_density_min         -0.23
_refine_ls_extinction_coef       0.0019(4)
_refine_ls_extinction_method     'SHELXS86 (Sheldrick, 1990)'
_refine_ls_goodness_of_fit_obs   1.13
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         4160
_refine_ls_R_factor_all          0.1461
_refine_ls_R_factor_obs          0.0560
_refine_ls_shift/esd_max         0.035
_refine_ls_shift/esd_mean        0.003
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1/[\s^2^(F~o~) + 0.0008F^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1027
_refine_ls_wR_factor_obs         0.0612
_reflns_number_observed          1458
_reflns_number_total             4160
_reflns_observed_criterion       F>4.5\s(F)
_cod_data_source_file            pa1223.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w = 1/[\s^2^(F~o~) +
0.0008F^2^]' was changed to 'calc'. New tag
'_refine_ls_weighting_details' was created. The value of the new tag
was set to 'w = 1/[\s^2^(F~o~) + 0.0008F^2^]'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        2364.9(15)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2005414