Hantzsch 1,4-dihydropyridine esters and analogs: candidates for generating reproducible one-dimensional packing motifs
Rathore, R. S.; Reddy, B. Palakshi; Vijayakumar, V.; Ragavan, R. Venkat; Narasimhamurthy, T.; Acta Crystallographica Section B 65 (2009) 375–381; doi:10.1107/S0108768109004832

data_2104356
_publ_section_title
;
 Hantzsch 1,4-dihydropyridine esters and analogs: candidates for
 generating reproducible one-dimensional packing motifs
;
_journal_coeditor_code           EB5001
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              375
_journal_page_last               381
_journal_paper_doi               10.1107/S0108768109004832
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C17 H18 N2 O4'
_chemical_formula_sum            'C17 H18 N2 O4'
_chemical_formula_weight         314.33
_chemical_melting_point          483
_chemical_name_common            'Hantzsch 1,4-dihydropyridine ester analog'
_chemical_name_systematic
;
3, 5-diacetyl-2, 6-dimethyl -1, 4 dihydro-4-(3-nitrophenyl)-3, 5-pyridine
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 104.606(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.8420(7)
_cell_length_b                   16.0785(14)
_cell_length_c                   11.2188(10)
_cell_measurement_reflns_used    1601
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      19.1
_cell_measurement_theta_min      2.3
_cell_volume                     1543.4(2)
_computing_cell_refinement       'SAINT-Plus (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2003)'
_computing_data_reduction        SAINT-Plus
_computing_molecular_graphics
'ORTEP-III (Farrugia, 1997), PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PLATON'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXTL (Bruker, 2003) '
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w-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  0.0497
_diffrn_reflns_av_sigmaI/netI    0.0525
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            11818
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.908
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.353
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.170
_refine_diff_density_min         -0.171
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.107
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         3025
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.107
_refine_ls_R_factor_all          0.1063
_refine_ls_R_factor_gt           0.0646
_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^)+(0.0354P)^2^+0.4210P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1118
_refine_ls_wR_factor_ref         0.1264
_reflns_number_gt                2030
_reflns_number_total             3025
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            eb5001.cif
_cod_data_source_block           III
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               2104356