Low-temperature redetermination of benzofurazan 1-oxide
Ng, Seik Weng; Acta Crystallographica Section E 65 (2009) o1275–; doi:10.1107/S1600536809017036

data_2222158
_publ_section_title
;
 Low-temperature redetermination of benzofurazan 1-oxide
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1275
_journal_paper_doi               10.1107/S1600536809017036
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C6 H4 N2 O2'
_chemical_formula_moiety         'C6 H4 N2 O2'
_chemical_formula_sum            'C6 H4 N2 O2'
_chemical_formula_weight         136.11
_chemical_name_common            'benzofurazan 1-oxide'
_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   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                100.710(2)
_cell_angle_beta                 114.265(2)
_cell_angle_gamma                111.747(2)
_cell_formula_units_Z            2
_cell_length_a                   6.6751(2)
_cell_length_b                   7.3256(2)
_cell_length_c                   7.6842(2)
_cell_measurement_reflns_used    1320
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      3.2
_cell_volume                     291.711(18)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material  'publCIF (Westrip, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.956
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device_type  'Bruker SMART APEX diffractometer'
_diffrn_measurement_method       '\w 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  0.012
_diffrn_reflns_av_sigmaI/netI    0.025
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            1952
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         3.2
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.120
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow-orange
_exptl_crystal_density_diffrn    1.550
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Irregular block'
_exptl_crystal_F_000             140
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.33
_refine_diff_density_min         -0.21
_refine_ls_extinction_coef       0.030(10)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.03
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     108
_refine_ls_number_reflns         1276
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.02
_refine_ls_R_factor_all          0.041
_refine_ls_R_factor_gt           0.035
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0685P)^2^+0.0855P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.104
_refine_ls_wR_factor_ref         0.110
_reflns_number_gt                1110
_reflns_number_total             1276
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            tk2443.cif
_cod_data_source_block           I
_cod_depositor_comments
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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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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 
;
_cod_original_cell_volume        291.710(10)
_cod_database_code               2222158
_cod_database_fobs_code          2222158