2-Ethyl-1<i>H</i>-imidazole-4-carboxylate monohydrate
Li, Shi-Jie; Liu, Juan-Hua; Song, Wen-Dong; Li, Xiao-Fei; Miao, Dong-Liang; Acta Crystallographica Section E 67 (2011) o996–o997; doi:10.1107/S1600536811010774

data_2229726
_publ_section_title
;
 2-Ethyl-1<i>H</i>-imidazole-4-carboxylate monohydrate
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o996
_journal_page_last               o997
_journal_paper_doi               10.1107/S1600536811010774
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C7 H10 N2 O5'
_chemical_formula_sum            'C7 H10 N2 O5'
_chemical_formula_weight         202.17
_chemical_name_systematic
;
2-Ethyl-1<i>H</i>-imidazole-4-carboxylate monohydrate
;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.7990(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.6132(6)
_cell_length_b                   14.3779(16)
_cell_length_c                   7.9396(8)
_cell_measurement_reflns_used    1702
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      25.93
_cell_measurement_theta_min      2.449
_cell_volume                     861.04(15)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'SMART (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_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      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART 1000 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  0.0309
_diffrn_reflns_av_sigmaI/netI    0.0328
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            4224
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.70
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_T_max  0.9484
_exptl_absorpt_correction_T_min  0.9360
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.560
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             424
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.41
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.277
_refine_diff_density_min         -0.214
_refine_ls_extinction_coef       0.060(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         1510
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0531
_refine_ls_R_factor_gt           0.0381
_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^)+(0.0470P)^2^+0.3916P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0941
_refine_ls_wR_factor_ref         0.1061
_reflns_number_gt                1166
_reflns_number_total             1510
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jh2272.cif
_cod_data_source_block           I
_cod_original_sg_symbol_Hall     '-P 2ybc '
_cod_original_sg_symbol_H-M      'P 21/c '
_cod_database_code               2229726
_cod_database_fobs_code          2229726