2,3,6-Trichloro-5-(trichloromethyl)pyridine
Zhu, Xue-mei; Pei, Li-jun; Cai, Zhao-sheng; Song, Zhan-qian; Shang, Shi-bin; Acta Crystallographica Section E 68 (2012) o2723–; doi:10.1107/S1600536812035404

data_2236548
_publ_section_title
;
 2,3,6-Trichloro-5-(trichloromethyl)pyridine
;
_journal_coeditor_code           PV2577
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2723
_journal_paper_doi               10.1107/S1600536812035404
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C6 H Cl6 N'
_chemical_formula_moiety         'C6 H Cl6 N'
_chemical_formula_sum            'C6 H Cl6 N'
_chemical_formula_weight         299.78
_chemical_name_systematic
;
2,3,6-Trichloro-5-(trichloromethyl)pyridine
;
_space_group_IT_number           57
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2c 2b'
_symmetry_space_group_name_H-M   'P b c m'
_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            4
_cell_length_a                   8.3100(17)
_cell_length_b                   17.018(3)
_cell_length_c                   7.3160(15)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      10
_cell_volume                     1034.6(4)
_computing_cell_refinement       'CAD4 Software (Enraf--Nonius, 1985)'
_computing_data_collection       'CAD4 Software (Enraf--Nonius, 1985)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Enraf--Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_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  0.0633
_diffrn_reflns_av_sigmaI/netI    0.0550
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       0
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1985
_diffrn_reflns_theta_full        25.39
_diffrn_reflns_theta_max         25.39
_diffrn_reflns_theta_min         2.39
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    1.607
_exptl_absorpt_correction_T_max  0.7393
_exptl_absorpt_correction_T_min  0.6442
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.925
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.258
_refine_diff_density_min         -0.385
_refine_ls_extinction_coef       0.077(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     77
_refine_ls_number_reflns         1033
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.0558
_refine_ls_R_factor_gt           0.0398
_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^)+(0.0780P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1107
_refine_ls_wR_factor_ref         0.1234
_reflns_number_gt                779
_reflns_number_total             1033
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            pv2577.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P b c m '
_cod_database_code               2236548
_cod_database_fobs_code          2236548