Orthorhombic and monoclinic polymorphs of 1,3,5-triphenylperhydro-1,3,5-triazine-2,4,6-trione at 120K: chains and sheets formed by C—H···π(arene) hydrogen bonds
Mariyatra, M. Baby; Panchanatheswaran, Krishnaswamy; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 60 (2004) o682–o685; doi:10.1107/S0108270104017342

data_2014248
_publ_section_title
;
 Orthorhombic and monoclinic polymorphs of
 1,3,5-triphenylperhydro-1,3,5-triazine-2,4,6-trione at 120K: chains
 and sheets formed by C---H&#x00B7;&#x00B7;&#x00B7;\p(arene) hydrogen
 bonds
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o682
_journal_page_last               o685
_journal_paper_doi               10.1107/S0108270104017342
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C21 H15 N3 O3'
_chemical_formula_moiety         'C21 H15 N3 O3'
_chemical_formula_sum            'C21 H15 N3 O3'
_chemical_formula_weight         357.36
_chemical_name_systematic
;
1,3,5-triphenylperhydro-1,3,5-triazine-2,4,6-trione, monoclinic polymorph
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 126.035(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.6526(3)
_cell_length_b                   13.6819(3)
_cell_length_c                   9.6454(2)
_cell_measurement_reflns_used    1927
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      3.22
_cell_volume                     1670.39(7)
_computing_cell_refinement       'DENZO and COLLECT (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        'DENZO and COLLECT'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'OSCAIL and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution
'OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0307
_diffrn_reflns_av_sigmaI/netI    0.0207
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            13735
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.22
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.988
_exptl_absorpt_correction_T_min  0.945
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.421
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.598
_refine_diff_density_min         -0.433
_refine_ls_extinction_coef       0.034(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.173
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     126
_refine_ls_number_reflns         1927
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.173
_refine_ls_R_factor_all          0.0584
_refine_ls_R_factor_gt           0.0495
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.073P)^2^+0.412P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1175
_refine_ls_wR_factor_ref         0.1236
_reflns_number_gt                1620
_reflns_number_total             1927
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1750.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2014248
_cod_database_fobs_code          2014248