6-Chloronicotinic acid
Long, Sihui; Siegler, Maxime; Li, Tonglei; Acta Crystallographica Section E 63 (2007) o279–o281; doi:10.1107/S1600536806053177

data_2211928
_publ_section_title
;
 6-Chloronicotinic acid
;
_journal_coeditor_code           SF3028
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o279
_journal_page_last               o281
_journal_paper_doi               10.1107/S1600536806053177
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C6 H4 Cl N O2'
_chemical_formula_moiety         'C6 H4 Cl N O2'
_chemical_formula_sum            'C6 H4 Cl N O2'
_chemical_formula_weight         157.55
_chemical_name_systematic
;
6-chloronicotinic acid
;
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_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   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.130(10)
_cell_angle_beta                 90.750(10)
_cell_angle_gamma                103.170(10)
_cell_formula_units_Z            2
_cell_length_a                   3.7410(10)
_cell_length_b                   5.7610(10)
_cell_length_c                   14.737(4)
_cell_measurement_reflns_used    1365
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     309.23(13)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2002)'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'XP in SHELXTL/PC (Sheldrick, 1995)'
_computing_publication_material  'SHELXL97 and local procedures'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\w scans at fixed \c = 55\%'
_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  0.0184
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            2665
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         1.38
_exptl_absorpt_coefficient_mu    0.539
_exptl_absorpt_correction_T_max  0.9581
_exptl_absorpt_correction_T_min  0.8769
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SCALEPACK; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.692
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin rod'
_exptl_crystal_F_000             160
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.327
_refine_diff_density_min         -0.271
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     92
_refine_ls_number_reflns         1403
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0287
_refine_ls_R_factor_gt           0.0252
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0233P)^2^+0.1455P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0644
_refine_ls_wR_factor_ref         0.0669
_reflns_number_gt                1286
_reflns_number_total             1403
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sf3028.cif
_cod_data_source_block           I
_cod_database_code               2211928
_cod_database_fobs_code          2211928