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_7111349
_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            'C54 H60 N2'
_chemical_formula_weight         737.04
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 115.6340(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.7777(7)
_cell_length_b                   19.5961(9)
_cell_length_c                   16.7434(8)
_cell_measurement_reflns_used    5751
_cell_measurement_temperature    200.0(2)
_cell_measurement_theta_max      23.218
_cell_measurement_theta_min      2.460
_cell_volume                     4371.4(4)
_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      200.0(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0406
_diffrn_reflns_av_sigmaI/netI    0.0371
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            26282
_diffrn_reflns_theta_full        23.28
_diffrn_reflns_theta_max         23.28
_diffrn_reflns_theta_min         1.70
_diffrn_standards_decay_%        <1
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.120
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bar
_exptl_crystal_F_000             1592
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.36
_refine_diff_density_max         0.235
_refine_diff_density_min         -0.160
_refine_diff_density_rms         0.031
_refine_ls_extinction_coef       0.0037(5)
_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   0.977
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     590
_refine_ls_number_reflns         6288
_refine_ls_number_restraints     38
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0840
_refine_ls_R_factor_gt           0.0541
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0817P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1400
_refine_ls_wR_factor_ref         0.1519
_reflns_number_gt                3581
_reflns_number_total             6288
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b406495jsup1.cif
_cod_data_source_block           j111a1s
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7111349