2,4,6-Trichlorophenylisonitrile and 2,4,6-trichlorobenzonitrile
Pink, Maren; Britton, Doyle; Noland, Wayland E.; Pinnow, Matthew J.; Acta Crystallographica Section C 56 (2000) 1271–1273; doi:10.1107/S0108270100010234

data_2011396
_publ_section_title
;
 2,4,6-Trichlorophenylisonitrile and 2,4,6-trichlorobenzonitrile
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1271
_journal_page_last               1273
_journal_paper_doi               10.1107/S0108270100010234
_journal_volume                  56
_journal_year                    2000
_chemical_formula_sum            'C7 H2 Cl3 N'
_chemical_formula_weight         206.45
_chemical_melting_point          325.4(3)
_chemical_name_systematic
;
 2,4,6-trichloro-1-isocyanobenzene
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_audit_creation_method           'SHELXL  + manual additions'
_cell_angle_alpha                90.00
_cell_angle_beta                 97.187(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.5907(6)
_cell_length_b                   15.975(2)
_cell_length_c                   11.1730(13)
_cell_measurement_reflns_used    1642
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.1
_cell_measurement_theta_min      2.2
_cell_volume                     812.95(17)
_computing_cell_refinement       'SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXLTL
_computing_publication_material  SHELXLTL
_computing_structure_refinement  SHELXLTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1994)'
_diffrn_ambient_temperature      173(2)
_diffrn_measurement_device       'Siemens SMART area detector diffractometer'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .054
_diffrn_reflns_av_sigmaI/netI    .062
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6423
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         2.2
_diffrn_standards_decay_%        'less than 1'
_diffrn_standards_interval_time
;
 the first 207 reflections were remeasured at the end of the data
 collection 20 hours later
;
_diffrn_standards_number         207
_exptl_absorpt_coefficient_mu    1.051
_exptl_absorpt_correction_T_max  .95
_exptl_absorpt_correction_T_min  .90
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996; Blessing, 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.687
_exptl_crystal_density_meas      ?
_exptl_crystal_description       needles
_exptl_crystal_F_000             408
_exptl_crystal_size_max          .15
_exptl_crystal_size_mid          .05
_exptl_crystal_size_min          .05
_refine_diff_density_max         .32
_refine_diff_density_min         -.29
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   .93
_refine_ls_goodness_of_fit_obs   1.04
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1855
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      .93
_refine_ls_restrained_S_obs      1.04
_refine_ls_R_factor_all          .081
_refine_ls_R_factor_obs          .039
_refine_ls_shift/esd_max         .001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.049P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         .095
_refine_ls_wR_factor_obs         .083
_reflns_number_observed          1163
_reflns_number_total             1855
_reflns_observed_criterion       I>2\s(I)
_cod_data_source_file            bk1548.cif
_cod_data_source_block           isonitrile
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '325.2-325.7' was changed to
'325.4(3)' - the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '325.2-325.7' was changed to
'325.4(3)' - the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.049P)^2^] where P=(Fo^2^+2Fc^2^)/3' was changed to
'calc'. New tag '_refine_ls_weighting_details' was created. The value
of the new tag was set to 'w = 1/[\s^2^(Fo^2^)+(0.049P)^2^] where
P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        813.0(2)
_cod_original_sg_symbol_H-M      ' P 21/c'
_cod_database_code               2011396
_cod_database_fobs_code          2011396