Single-crystal X-ray and neutron powder diffraction investigation of the phase transition in tetrachlorobenzene
Barnett, Sarah A.; Broder, Charlotte K.; Shankland, Kenneth; David, Bill I. F.; Ibberson, Richard; Tocher, Derek A.; Acta Crystallographica Section B 62 (2006) 287–295; doi:10.1107/S0108768105042102

data_2100447
_publ_section_title
;
 Single-crystal X-ray and neutron powder diffraction investigation of
 the phase transition in tetrachlorobenzene
;
_journal_coeditor_code           SO5001
_journal_date_accepted           2005-12-15
_journal_date_recd_electronic    2005-10-19
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              287
_journal_page_last               295
_journal_paper_category          FA
_journal_paper_doi               10.1107/S0108768105042102
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C6 H2 Cl4'
_chemical_formula_sum            'C6 H2 Cl4'
_chemical_formula_weight         215.88
_chemical_name_systematic
;
 Tetrachlorobenzene - alpha polymorph
;
_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   'difference Fourier synthesis'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                92.072(2)
_cell_angle_beta                 98.966(2)
_cell_angle_gamma                96.520(2)
_cell_formula_units_Z            2
_cell_length_a                   3.8016(5)
_cell_length_b                   10.6369(15)
_cell_length_c                   9.4866(13)
_cell_measurement_reflns_used    2248
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.205
_cell_measurement_theta_min      2.177
_cell_volume                     375.91(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.926
_diffrn_measurement_device_type  'Bruker SMART APEX diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0235
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            6306
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.25
_diffrn_reflns_theta_min         1.93
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.480
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.907
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             212
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.430
_refine_diff_density_min         -0.283
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     97
_refine_ls_number_reflns         5690
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0375
_refine_ls_R_factor_gt           0.0348
_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^)+(0.0685P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0967
_refine_ls_wR_factor_ref         0.0990
_reflns_number_gt                5184
_reflns_number_total             5690
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            so5001.cif
_cod_data_source_block           tcb_alpha_150K_X-ray
_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 

The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'direct methods' was changed to
'direct'.

'_atom_sites_solution_hydrogens' value 'geometrically placed' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2100447