4,4'-Diiodobenzophenone
Maris, Thierry; Arseneault, Mathieu; Wuest, James D.; Personal communication to COD  (2023) –; doi:

data_3500136
_publ_section_references
;
Dolomanov, O.V., Bourhis, L.J., Gildea, R.J, Howard, J.A.K. & Puschmann, H.
 (2009), J. Appl. Cryst. 42, 339-341.

Krause, L., Herbst-Irmer, R., Sheldrick, G. M. & Stalke, D. (2015).
J. Appl. Cryst. 48, 3-10.

Sheldrick, G.M. (2015a). Acta Cryst. A71, 3-8.

Sheldrick, G.M. (2015b). Acta Cryst. C71, 3-8.

Spek, A. L. (2020). Acta Cryst. E76, 1-11.

Bruker,(2002). SMART, SAINT and SHELXTL, Bruker AXS Inc.
Madison, Wisconsin, USA.  

;
_publ_section_title
;
 4,4'-Diiodobenzophenone
;
_journal_name_full               'Personal communication to COD'
_journal_year                    2023
_chemical_formula_moiety         'C13 H8 I2 O'
_chemical_formula_sum            'C13 H8 I2 O'
_chemical_formula_weight         433.99
_chemical_name_common            4,4'-Diiodobenzophenone
_space_group_crystal_system      orthorhombic
_space_group_IT_number           37
_space_group_name_Hall           'C 2 -2c'
_space_group_name_H-M_alt        'C c c 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2023-03-23
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6408)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.4381(8)
_cell_length_b                   28.138(3)
_cell_length_c                   6.0551(6)
_cell_measurement_reflns_used    2974
_cell_measurement_temperature    295
_cell_measurement_theta_max      68.842
_cell_measurement_theta_min      3.141
_cell_volume                     1267.3(2)
_computing_cell_refinement       'SAINT v6.28A (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker 2002)'
_computing_data_reduction        'SAINT v6.28A (Bruker, 2002)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'XT  (Sheldrick, 2015)'
_diffrn_ambient_temperature      295.00
_diffrn_detector_area_resol_mean 5.5
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker AXS Smart 2K/Platform'
_diffrn_measurement_method       \w
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0397
_diffrn_reflns_av_unetI/netI     0.0415
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            3427
_diffrn_reflns_point_group_measured_fraction_max 0.879
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.934
_diffrn_reflns_theta_min         3.141
_diffrn_source_current           50.0
_diffrn_source_power             2.25
_diffrn_source_voltage           45.0
_exptl_absorpt_coefficient_mu    38.785
_exptl_absorpt_correction_T_max  0.1333
_exptl_absorpt_correction_T_min  0.0169
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1667 before and 0.0842 after correction.
The Ratio of minimum to maximum transmission is 0.1268.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    2.275
_exptl_crystal_description       plate
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
_refine_diff_density_max         0.604
_refine_diff_density_min         -0.481
_refine_diff_density_rms         0.143
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.12(2)
_refine_ls_extinction_coef       0.00075(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2019/2 (Sheldrick 2019)'
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     76
_refine_ls_number_reflns         1036
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0365
_refine_ls_R_factor_gt           0.0362
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0772P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1013
_refine_ls_wR_factor_ref         0.1019
_refine_special_details
;
 Refined as a 2-component inversion twin.

1. Twinned data refinement
 Scales: 0.88(3)
 0.12(3)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
3. Restrained distances
 C7-O1
 1.2 with sigma of 0.005
4.a Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C5(H5), C6(H6)
;
_reflns_Friedel_coverage         0.591
_reflns_Friedel_fraction_full    0.747
_reflns_Friedel_fraction_max     0.735
_reflns_number_gt                1003
_reflns_number_total             1036
_reflns_special_details
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences. Completness statistics refer to single and
 composite reflections containing twin component 1 only.
;
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jiw723.cif
_cod_data_source_block           jiw723
_cod_database_code               3500136
_cod_database_fobs_code 3500136