Succinic acid di-2-imidazolidinone
Callear, Samantha K.; Hursthouse, Michael B.; Crystal Structure Report Archive  (2008) 522–; doi:

data_1520198
_publ_section_title
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 Succinic acid di-2-imidazolidinone
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              522
_journal_year                    2008
_chemical_formula_sum            'C10 H18 N4 O6'
_chemical_formula_weight         290.28
_chemical_name_systematic
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succinic acid & 2-imidazolidinone
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_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                104.839(3)
_cell_angle_beta                 91.938(3)
_cell_angle_gamma                95.093(3)
_cell_formula_units_Z            2
_cell_length_a                   5.5097(15)
_cell_length_b                   9.529(2)
_cell_length_c                   13.030(3)
_cell_measurement_reflns_used    913
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      29.25
_cell_measurement_theta_min      3.61
_cell_volume                     657.5(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Bruker SMART APEX2 CCD diffractometer'
_diffrn_measurement_method       'fine-slice \w scans'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         'Daresbury SRS station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6905
_diffrn_reflns_av_R_equivalents  0.0277
_diffrn_reflns_av_sigmaI/netI    0.0424
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            5694
_diffrn_reflns_theta_full        26.64
_diffrn_reflns_theta_max         26.64
_diffrn_reflns_theta_min         2.98
_diffrn_standards_decay_%        5
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.122
_exptl_absorpt_correction_T_max  0.9952
_exptl_absorpt_correction_T_min  0.9856
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.466
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             308
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.454
_refine_diff_density_min         -0.475
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2909
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0626
_refine_ls_R_factor_gt           0.0507
_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^)+(0.0846P)^2^+0.3023P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1386
_refine_ls_wR_factor_ref         0.1486
_reflns_number_gt                2337
_reflns_number_total             2909
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-522.cif
_cod_data_source_block           ssf1338
_cod_depositor_comments
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Citation :
Callear, Samantha K. and Hursthouse, Michael B. (2008) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/522)

More at:
http://ecrystals.chem.soton.ac.uk/522/
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_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1520198