Conformational and electronic engineering of twisted diphenylacetylenes.
Brizius, Glen; Billingsley, Kelvin; Smith, Mark D.; Bunz, Uwe H. F.; Organic letters 5 (2003) 3951–3954; doi:10.1021/ol035532+

data_1556106
_publ_section_title
;
 Conformational and electronic engineering of twisted diphenylacetylenes.
;
_journal_issue                   21
_journal_name_full               'Organic letters'
_journal_page_first              3951
_journal_page_last               3954
_journal_paper_doi               10.1021/ol035532+
_journal_volume                  5
_journal_year                    2003
_chemical_formula_sum            'C28 H16 F6 O2'
_chemical_formula_weight         498.41
_space_group_IT_number           37
_space_group_name_Hall           'C 2 -2c'
_space_group_name_H-M_alt        'C c c 2'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'C c c 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   19.3494(11)
_cell_length_b                   20.3274(11)
_cell_length_c                   22.3761(13)
_cell_measurement_reflns_used    5701
_cell_measurement_temperature    150.0(2)
_cell_measurement_theta_max      26.376
_cell_measurement_theta_min      2.330
_cell_volume                     8801.0(9)
_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      150.0(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         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0420
_diffrn_reflns_av_sigmaI/netI    0.0390
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            32416
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         1.45
_diffrn_standards_decay_%        <1
_exptl_absorpt_coefficient_mu    0.128
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.505
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4064
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.168
_refine_diff_density_min         -0.256
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
Freidel opposites merged.  Absolute structure not
determined due to lack of heavy atoms.
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     679
_refine_ls_number_reflns         7616
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0529
_refine_ls_R_factor_gt           0.0437
_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^)+(0.0498P)^2^+2.9124P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0996
_refine_ls_wR_factor_ref         0.1048
_reflns_number_gt                6515
_reflns_number_total             7616
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol035532%2Bsi20030827_100633.cif
_cod_data_source_block           glb001s
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      Ccc2
_cod_database_code               1556106