Anhydrous 1-methylimidazolidin-2-one
Caudle, M. Tyler; Tassone, Erica; Groy, Thomas L.; Acta Crystallographica Section E 61 (2005) o3269–o3270; doi:10.1107/S1600536805028023

data_2206832
_publ_section_title
;
 Anhydrous 1-methylimidazolidin-2-one
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_journal_coeditor_code           AC6191
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3269
_journal_page_last               o3270
_journal_paper_doi               10.1107/S1600536805028023
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C4 H8 N2 O'
_chemical_formula_moiety         'C4 H8 N2 O'
_chemical_formula_sum            'C4 H8 N2 O'
_chemical_formula_weight         100.12
_chemical_name_systematic        N-methylimidazolidin-2-one
_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                 117.139(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.5746(11)
_cell_length_b                   9.3984(13)
_cell_length_c                   7.9482(11)
_cell_measurement_reflns_used    1593
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      31.59
_cell_measurement_theta_min      3.02
_cell_volume                     503.53(12)
_computing_cell_refinement       'SAINT (Bruker, 1997)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker 1997)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_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 APEX'
_diffrn_measurement_method       \w
_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  0.0918
_diffrn_reflns_av_sigmaI/netI    0.0667
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            3853
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         3.02
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.94
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(Blessing, 1995)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             216
_exptl_crystal_size_max          0.375
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.180
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.161
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     65
_refine_ls_number_reflns         888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.161
_refine_ls_R_factor_all          0.0913
_refine_ls_R_factor_gt           0.0702
_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^)+(0.0535P)^2^+0.1874P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1483
_refine_ls_wR_factor_ref         0.1605
_reflns_number_gt                712
_reflns_number_total             888
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ac6191.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2206832
_cod_database_fobs_code          2206832