Structure of <i>trans</i>-decafluoroazobenzene
Chinnakali, K.; Fun, H.-K.; Shawkataly, O. B.; Teoh, S.-G.; Acta Crystallographica Section C 49 (1993) 615–616; doi:10.1107/S0108270192009454

data_2001917
_publ_section_title
;
 Structure of <i>trans</i>-decafluoroazobenzene
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              615
_journal_page_last               616
_journal_paper_doi               10.1107/S0108270192009454
_journal_volume                  49
_journal_year                    1993
_chemical_formula_sum            'C12 F10 N2'
_chemical_formula_weight         362.1
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_cell_angle_alpha                90.0
_cell_angle_beta                 94.03(2)
_cell_angle_gamma                90.0
_cell_formula_units_Z            4
_cell_length_a                   17.371(6)
_cell_length_b                   7.621(2)
_cell_length_c                   8.862(3)
_cell_measurement_reflns_used    50
_cell_measurement_temperature    298
_cell_measurement_theta_max      17.5
_cell_measurement_theta_min      7.5
_cell_volume                     1170.3(6)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       2\q/\q
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.044
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2420
_diffrn_reflns_theta_max         55.0
_diffrn_standards_decay_%        insignificant
_diffrn_standards_interval_count 200
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.237
_exptl_absorpt_correction_T_max  1.052
_exptl_absorpt_correction_T_min  0.930
_exptl_absorpt_correction_type   'empirical (Ugozzoli, 1987)'
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    2.055
_exptl_crystal_density_meas      2.038
_exptl_crystal_description       'Thin plate'
_exptl_crystal_size_max          1.0
_exptl_crystal_size_mid          0.66
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.15
_refine_ls_goodness_of_fit_obs   1.44
_refine_ls_number_parameters     109
_refine_ls_number_reflns         981
_refine_ls_R_factor_obs          0.0317
_refine_ls_shift/esd_max         0.000
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1.0/[\s^2^(F)+0.00050F^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_obs         0.0438
_reflns_number_observed          981
_reflns_number_total             1347
_reflns_observed_criterion       F>4\s(F)
_cod_data_source_file            li1017.cif
_cod_data_source_block           li1017_structure_1_of_1
_cod_depositor_comments
;

    Adding symmetry operators
        -x+1/2,y+1/2,-z+1/2
        -x,-y,-z
        -x,y,-z+1/2
        x+1/2,-y+1/2,z+1/2
        x+1/2,y+1/2,z
        x,-y,z+1/2
    to the list given in _symmetry_equiv_pos_as_xyz, because:

    a) Updated list of symmetry operators forms a full group of symmetry
       operators of spacegroup 'C 1 2/c 1';

    b) Calculated summary chemical formula is now the same as given by
       the authors of publication;

    c) Large crystal voids (up to 5.22 angstroms in diameter), which are
       found in the structure of previous revisions, have disappeared.

    Andrius Merkys
    2014-07-01

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value '1.0/[\s^2^(F)+0.00050F^2^]' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to 'w =
1.0/[\s^2^(F)+0.00050F^2^]'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               2001917