An orthorhombic modification of 4,4'-diaminobenzophenone
Wen, Yi-Hang; He, Yin-Hua; Feng, Yun-Long; Ng, Seik Weng; Acta Crystallographica Section E 62 (2006) o1787–o1788; doi:10.1107/S1600536806012281

data_2208803
_publ_section_title
;
 An orthorhombic modification of 4,4'-diaminobenzophenone
;
_journal_coeditor_code           BT2048
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1787
_journal_page_last               o1788
_journal_paper_doi               10.1107/S1600536806012281
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C13 H12 N2 O'
_chemical_formula_moiety         'C13 H12 N2 O'
_chemical_formula_sum            'C13 H12 N2 O'
_chemical_formula_weight         212.25
_chemical_name_systematic
;
4,4'-Diaminobenzophenone
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.4982(5)
_cell_length_b                   8.1110(7)
_cell_length_c                   24.306(2)
_cell_measurement_reflns_used    3128
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.0
_cell_volume                     1083.95(16)
_computing_cell_refinement       CRYSTALCLEAR
_computing_data_collection       'CRYSTALCLEAR (Rigaku/MSC, 2000)'
_computing_data_reduction        CRYSTALCLEAR
_computing_molecular_graphics    'SHELXTL (Bruker, 1998)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_measured_fraction_theta_full 1.00
_diffrn_measured_fraction_theta_max 1.00
_diffrn_measurement_device_type  'Rigaku Mercury CCD area-detector'
_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  0.023
_diffrn_reflns_av_sigmaI/netI    0.016
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            8288
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         3.0
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.702
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CRYSTALCLEAR; Rigaku/MSC, 2000)'
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.20
_refine_diff_density_min         -0.13
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.02
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     193
_refine_ls_number_reflns         1470
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.01
_refine_ls_R_factor_all          0.034
_refine_ls_R_factor_gt           0.032
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0594P)^2^+0.165P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.087
_refine_ls_wR_factor_ref         0.088
_reflns_number_gt                1416
_reflns_number_total             1470
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt2048.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_cell_volume        1084.0(2)
_cod_database_code               2208803
_cod_database_fobs_code          2208803