Ethyl 3,4-dimethyl-1<i>H</i>-pyrrole-2-carboxylate
Wu, Wei-Na; Li, Xiao-Xia; Wang, Qiu-Fen; Li, Yan-Wei; Acta Crystallographica Section E 66 (2010) o2309–; doi:10.1107/S160053681003179X

data_2227409
_publ_section_title
;
 Ethyl 3,4-dimethyl-1<i>H</i>-pyrrole-2-carboxylate
;
_journal_coeditor_code           FB2205
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2309
_journal_paper_doi               10.1107/S160053681003179X
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C9 H13 N O2'
_chemical_formula_moiety         'C9 H13 N O2'
_chemical_formula_sum            'C9 H13 N O2'
_chemical_formula_weight         167.20
_chemical_name_systematic
;
Ethyl 3,4-dimethyl-1<i>H</i>-pyrrole-2-carboxylate
;
_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'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.103(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.7485(2)
_cell_length_b                   7.0611(2)
_cell_length_c                   17.2167(5)
_cell_measurement_reflns_used    3131
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      24.75
_cell_measurement_theta_min      2.38
_cell_volume                     938.24(5)
_computing_cell_refinement       '<i>SAINT</i> (Bruker, 2007)'
_computing_data_collection       '<i>APEX2</i> (Bruker, 2007)'
_computing_data_reduction        '<i>SAINT</i> (Bruker, 2007)'
_computing_molecular_graphics    '<i>SHELXTL</i> (Sheldrick, 2008)'
_computing_publication_material  '<i>SHELXTL</i> (Sheldrick, 2008)'
_computing_structure_refinement  '<i>SHELXL97</i> (Sheldrick, 2008)'
_computing_structure_solution    '<i>SHELXS97</i> (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART APEX CCD'
_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  0.0194
_diffrn_reflns_av_sigmaI/netI    0.0197
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            8174
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.38
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.985
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(<i>SADABS</i>; Bruker, 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             360
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.214
_refine_diff_density_min         -0.173
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    49
_refine_ls_number_parameters     112
_refine_ls_number_reflns         2146
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0614
_refine_ls_R_factor_gt           0.0442
_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^)+(0.0691P)^2^+0.1432P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1234
_refine_ls_wR_factor_ref         0.1361
_reflns_number_gt                1579
_reflns_number_total             2146
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            fb2205.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2227409
_cod_database_fobs_code          2227409