#------------------------------------------------------------------------------
#$Date: 2016-03-26 20:50:34 +0200 (Sat, 26 Mar 2016) $
#$Revision: 180451 $
#$URL: svn://www.crystallography.net/cod/cif/7/21/20/7212023.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7212023
loop_
_publ_author_name
'Bujak, Maciej'
'Katrusiak, Andrzej'
_publ_section_title
;
 Molecular association in low-temperature and high-pressure polymorphs of
 1,1,1,2-tetrachloroethane
;
_journal_issue                   4
_journal_name_full               CrystEngComm
_journal_page_first              1263
_journal_paper_doi               10.1039/b918360d
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C2 H2 Cl4'
_chemical_formula_sum            'C2 H2 Cl4'
_chemical_formula_weight         167.84
_chemical_name_common            1,1,1,2-tetrachloroethane
_chemical_name_systematic
;
1,1,1,2-tetrachloroethane
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_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                 110.055(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   22.1891(15)
_cell_length_b                   5.4975(2)
_cell_length_c                   10.2493(6)
_cell_measurement_reflns_used    3882
_cell_measurement_temperature    100.0(1)
_cell_measurement_theta_max      30.04
_cell_measurement_theta_min      3.75
_cell_volume                     1174.45(12)
_computing_cell_refinement       'CrysAlisRED (Oxford Diffraction, 2007)'
_computing_data_collection       'CrysAlisCCD (Oxford Diffraction, 2007)'
_computing_data_reduction        'CrysAlisRED (Oxford Diffraction, 2007)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1990)'
_computing_publication_material  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS--97 (Sheldrick, 1997)'
_diffrn_ambient_pressure         100
_diffrn_ambient_temperature      100.0(1)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       ω-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  0.0172
_diffrn_reflns_av_sigmaI/netI    0.0117
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4398
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.83
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.864
_exptl_absorpt_correction_T_max  0.7069
_exptl_absorpt_correction_T_min  0.6048
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
Correction for absorption was made using CrysAlisRED
(Oxford Diffraction, 2007).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.898
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.616
_refine_diff_density_min         -0.592
_refine_diff_density_rms         0.056
_refine_ls_extinction_coef       0.0013(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     75
_refine_ls_number_reflns         1034
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.317
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0261
_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/[σ²(Fo²)+(0.0089P)²+3.8001P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0523
_refine_ls_wR_factor_ref         0.0543
_reflns_number_gt                944
_reflns_number_total             1034
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b918360d.txt
_cod_data_source_block           1112TCE_100K
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7212023
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, y, -z+1/2'
'x+1/2, y+1/2, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y, z-1/2'
'-x+1/2, -y+1/2, -z'
'x+1/2, -y+1/2, z-1/2'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
Cl1 Cl 0.69409(3) -0.01567(14) 0.48899(7) 0.0329(2) Uani 1 1 d . . .
Cl2 Cl 0.68902(4) 0.37962(15) 0.68299(8) 0.0413(2) Uani 1 1 d U . .
Cl3 Cl 0.59493(5) 0.37070(17) 0.40782(8) 0.0591(3) Uani 1 1 d . . .
Cl4 Cl 0.54904(4) 0.19685(19) 0.65215(9) 0.0524(3) Uani 1 1 d U . .
C11 C 0.6446(3) 0.1843(8) 0.5459(4) 0.0226(15) Uani 0.702(15) 1 d P A 1
C21 C 0.6018(3) 0.0208(9) 0.5973(5) 0.0291(15) Uani 0.702(15) 1 d P A 1
H211 H 0.6282 -0.0783 0.6739 0.035 Uiso 0.702(15) 1 calc PR A 1
H212 H 0.5774 -0.0871 0.5231 0.035 Uiso 0.702(15) 1 calc PR A 1
C12 C 0.6144(7) 0.227(2) 0.5746(11) 0.032(4) Uani 0.298(15) 1 d P A 2
C22 C 0.6325(7) -0.018(2) 0.5618(12) 0.034(4) Uani 0.298(15) 1 d P A 2
H221 H 0.5958 -0.1086 0.5024 0.041 Uiso 0.298(15) 1 calc PR A 2
H222 H 0.6476 -0.0952 0.6523 0.041 Uiso 0.298(15) 1 calc PR A 2
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
Cl1 0.0323(4) 0.0380(4) 0.0305(4) -0.0013(3) 0.0136(3) 0.0051(3)
Cl2 0.0490(5) 0.0372(4) 0.0302(4) -0.0033(3) 0.0038(3) -0.0176(4)
Cl3 0.0917(8) 0.0428(5) 0.0248(4) 0.0071(4) -0.0032(4) 0.0200(5)
Cl4 0.0307(4) 0.0802(7) 0.0499(5) -0.0350(5) 0.0183(4) -0.0093(4)
C11 0.023(3) 0.027(2) 0.018(2) 0.0009(17) 0.0061(19) 0.0018(19)
C21 0.024(3) 0.039(3) 0.028(2) -0.010(2) 0.014(2) -0.009(2)
C12 0.024(7) 0.046(8) 0.019(5) 0.002(5) 0.000(5) -0.010(6)
C22 0.033(8) 0.038(7) 0.027(6) 0.003(5) 0.005(5) -0.008(5)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C21 C11 Cl2 109.0(4)
C21 C11 Cl3 108.8(4)
Cl2 C11 Cl3 107.7(2)
C21 C11 Cl1 106.0(3)
Cl2 C11 Cl1 113.2(3)
Cl1 C11 Cl3 112.0(3)
C11 C21 Cl4 110.4(4)
C11 C21 H211 109.6
Cl4 C21 H211 109.6
C11 C21 H212 109.6
Cl4 C21 H212 109.6
H211 C21 H212 108.1
C22 C12 Cl3 108.1(12)
C22 C12 Cl2 105.2(11)
Cl3 C12 Cl2 104.2(6)
C22 C12 Cl4 103.8(10)
Cl3 C12 Cl4 118.1(8)
Cl2 C12 Cl4 116.5(8)
C12 C22 Cl1 108.4(11)
C12 C22 H221 110.0
Cl1 C22 H221 110.0
C12 C22 H222 110.0
Cl1 C22 H222 110.0
H221 C22 H222 108.4
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
Cl1 C11 1.787(6)
Cl1 C22 1.768(18)
Cl2 C11 1.775(4)
Cl2 C12 1.849(10)
Cl3 C11 1.788(4)
Cl3 C12 1.796(11)
Cl4 C12 1.884(18)
Cl4 C21 1.753(6)
C11 C21 1.527(9)
C12 C22 1.42(3)
C21 H211 0.9700
C21 H212 0.9700
C22 H221 0.9700
C22 H222 0.9700
loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
Cl2 C11 C21 Cl4 59.4(4)
Cl3 C11 C21 Cl4 -57.8(4)
Cl1 C11 C21 Cl4 -178.4(2)
Cl3 C12 C22 Cl1 53.6(10)
Cl2 C12 C22 Cl1 -57.3(9)
Cl4 C12 C22 Cl1 179.9(5)
