Cruciform ?-systems: effect of aggregation on emissionElectronic supplementary information (ESI) available: X-ray data of 1?4 and electron diffraction (experimental and simulated) of 3. See http://www.rsc.org/suppdata/cc/b4/b406495j/
Wilson, James N.; Smith, Mark D.; Enkelmann, Volker; Bunz, Uwe H. F.; Chemical Communications  (2004) 1700–1701; doi:10.1039/b406495j

data_7111346
_publ_section_title
;
 Cruciform ?-systems: effect of aggregation on emissionElectronic
 supplementary information (ESI) available: X-ray data of 1?4 and electron
 diffraction (experimental and simulated) of 3. See
 http://www.rsc.org/suppdata/cc/b4/b406495j/
;
_journal_issue                   15
_journal_name_full               'Chemical Communications'
_journal_page_first              1700
_journal_page_last               1701
_journal_paper_doi               10.1039/b406495j
_journal_year                    2004
_chemical_formula_sum            'C42 H22 F12'
_chemical_formula_weight         754.60
_chemical_name_systematic
;
?
;
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yc'
_symmetry_space_group_name_H-M   'P 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                 97.617(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   17.8688(14)
_cell_length_b                   5.0625(4)
_cell_length_c                   18.6933(15)
_cell_measurement_reflns_used    6553
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      25.501
_cell_measurement_theta_min      2.300
_cell_volume                     1676.1(2)
_computing_cell_refinement       'SAINT+ NT V6.02a (Bruker, 1998)'
_computing_data_collection       'SMART NT V5.625 (Bruker, 2000)'
_computing_data_reduction        'SAINT+ NT V6.02a'
_computing_molecular_graphics    'SHELXTL V5.1 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL V5.1'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEX CCD diffractometer'
_diffrn_measurement_method       '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  0.0360
_diffrn_reflns_av_sigmaI/netI    0.0322
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            9956
_diffrn_reflns_theta_full        24.11
_diffrn_reflns_theta_max         24.11
_diffrn_reflns_theta_min         2.20
_diffrn_standards_decay_%        <1
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow'green
_exptl_crystal_density_diffrn    1.495
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blade
_exptl_crystal_F_000             764
_exptl_crystal_size_max          0.72
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.196
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.040
_refine_ls_extinction_coef       0.0027(10)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    refU
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         2664
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0662
_refine_ls_R_factor_gt           0.0546
_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^)+(0.0700P)^2^+1.0519P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1344
_refine_ls_wR_factor_ref         0.1421
_reflns_number_gt                2254
_reflns_number_total             2664
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b406495jsup1.cif
_cod_data_source_block           jw05s
_cod_original_sg_symbol_H-M      P2/c
_cod_database_code               7111346