Benzidine: A Co-Crystallization Agent for Proton Acceptors
Rafilovich, Michal; Bernstein, Joel; Hickey, Magali B.; Tauber, Michael; Crystal Growth & Design 7 (2007) 1777–; doi:10.1021/cg0701325

data_4504239
_publ_section_title
;
 Benzidine:&#x00A0; A Co-Crystallization Agent for Proton Acceptors
;
_journal_issue                   9
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1777
_journal_paper_doi               10.1021/cg0701325
_journal_volume                  7
_journal_year                    2007
_chemical_formula_sum            'C30 H28 N4 O2'
_chemical_formula_weight         476.55
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.054(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   24.347(3)
_cell_length_b                   10.9654(15)
_cell_length_c                   19.683(2)
_cell_measurement_reflns_used    4942
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      26.60
_cell_measurement_theta_min      2.32
_cell_volume                     4967.0(11)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0395
_diffrn_reflns_av_sigmaI/netI    0.0527
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            20954
_diffrn_reflns_theta_full        28.36
_diffrn_reflns_theta_max         28.36
_diffrn_reflns_theta_min         1.77
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            dark
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2016
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.186
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     437
_refine_ls_number_reflns         6171
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0761
_refine_ls_R_factor_gt           0.0450
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0431P)^2^+1.2986P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1109
_refine_ls_wR_factor_ref         0.1302
_reflns_number_gt                4006
_reflns_number_total             6171
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg0701325si20070205_035820.cif
_cod_data_source_block           mr6012_
_cod_depositor_comments
;
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_cell_volume        4967.1(11)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4504239