Search for Conglomerate in Set of [7]Helquat Salts: Multigram Resolution of Helicene-Viologen Hybrid by Preferential Crystallization
Jan Vávra; Lukáš Severa; Ivana Císařová; Blanka Klepetářová; David Šaman; Dušan Koval; Václav Kašička; Filip Teplý; Journal of Organic Chemistry 78 (2013) 1329–1342; doi:10.1021/jo301615k

data_4027939
_publ_section_title
;
 Search for Conglomerate in Set of [7]Helquat Salts: Multigram Resolution
 of Helicene-Viologen Hybrid by Preferential Crystallization
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1329
_journal_page_last               1342
_journal_paper_doi               10.1021/jo301615k
_journal_volume                  78
_journal_year                    2013
_chemical_formula_moiety         'C30 H26 N2, 2(Br)'
_chemical_formula_sum            'C30 H26 Br2 N2'
_chemical_formula_weight         574.36
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             11-12-07
_audit_creation_method           CRYSTALS_ver_14.05
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.2508(18)
_cell_length_b                   17.190(3)
_cell_length_c                   23.356(3)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    170
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     4918.6(13)
_computing_cell_refinement       'CrysAlis RED, (Oxford Diffraction, 2002)'
_computing_data_collection       'Xcalibur, (Oxford Diffraction, 2002)'
_computing_data_reduction        'CrysAlis RED, (Oxford Diffraction, 2002)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'Superflip (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      170
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Oxford Diffraction XCALIBUR'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0717
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            24676
_diffrn_reflns_theta_full        75.918
_diffrn_reflns_theta_max         79.081
_diffrn_reflns_theta_min         4.432
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.336
_exptl_absorpt_correction_T_max  0.54
_exptl_absorpt_correction_T_min  0.25
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
; 
 Analytical Absorption (De Meulenaer & Tompa, 1965) 
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.551
_exptl_crystal_description       'thick plate'
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.570
_exptl_crystal_size_mid          0.320
_exptl_crystal_size_min          0.140
_refine_diff_density_max         0.88
_refine_diff_density_min         -0.53
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.0262
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         3856
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0495
_refine_ls_shift/su_max          0.0008732
_refine_ls_shift/su_mean         0.0000836
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 16.7 5.04 13.3 4.16 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0779
_refine_ls_wR_factor_gt          0.0581
_refine_ls_wR_factor_ref         0.0581
_reflns_limit_h_max              15
_reflns_limit_h_min              0
_reflns_limit_k_max              21
_reflns_limit_k_min              0
_reflns_limit_l_max              29
_reflns_limit_l_min              0
_reflns_number_gt                3856
_reflns_number_total             5208
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   3.34
_oxford_diffrn_Wilson_scale      0.25
_oxford_refine_ls_r_factor_ref   0.0495
_oxford_refine_ls_scale          1.914(4)
_oxford_reflns_number_all        5208
_oxford_reflns_threshold_expression_ref I>2.0\s(I)
_oxford_structure_analysis_title 'JV_1925b in Pccn'
_cod_data_source_file            jo301615k_2_Br2b.cif
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      'P c c n '
_cod_database_code               4027939