<i>trans</i>-1,2-Difluoro-3,4,5,6,7,8-hexaphenyltricyclo[4.2.0.0^2,5^]octa-3,7-diene
Deepak Chopra; K.Nagarajan; J.D. Roberts; T. N. Guru Row; Acta Crystallographica Section E 63 (2007) o4557–o4557; doi:10.1107/S1600536807054281

data_2216769
_publ_section_title
<i>trans</i>-1,2-Difluoro-3,4,5,6,7,8-hexaphenyltricyclo[4.2.0.0^2,5^]octa-3,7-diene
_journal_coeditor_code           SJ2394
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o4557
_journal_page_last               o4557
_journal_paper_doi               10.1107/S1600536807054281
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C44 H30 F2'
_chemical_formula_moiety         'C44 H30 F2'
_chemical_formula_sum            'C44 H30 F2'
_chemical_formula_weight         596.68
_chemical_name_systematic
;
trans-1,2-Difluoro-3,4,5,6,7,8-hexaphenyltricyclo[4.2.0.0^2,5^]octa-3,7-diene
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                95.63(4)
_cell_angle_beta                 103.87(5)
_cell_angle_gamma                91.64(4)
_cell_formula_units_Z            2
_cell_length_a                   9.331(9)
_cell_length_b                   13.136(8)
_cell_length_c                   13.614(9)
_cell_measurement_reflns_used    963
_cell_measurement_temperature    400(2)
_cell_measurement_theta_max      25.8
_cell_measurement_theta_min      1.2
_cell_volume                     1610(2)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT (Bruker, 2000)'
_computing_molecular_graphics
;
ORTEP3 for Windows (Farrugia, 1997) and CAMERON (Watkin <i>et al.</i>,
1993)
;
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare <i>et al.</i>,  1993)'
_diffrn_ambient_temperature      400(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w 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  0.0329
_diffrn_reflns_av_sigmaI/netI    0.0531
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11153
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.08
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  0.9846
_exptl_absorpt_correction_T_min  0.9386
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.231
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.310
_refine_diff_density_min         -0.177
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5532
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.1161
_refine_ls_R_factor_gt           0.0759
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1465P)^2^+1.8307P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2156
_refine_ls_wR_factor_ref         0.2410
_reflns_number_gt                3395
_reflns_number_total             5532
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sj2394.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'Triclinic' changed to 'triclinic'
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_database_code               2216769
_cod_database_fobs_code          2216769