4,4,5,5-Tetramethyl-2-(4-pyridyl)imidazolin-1-oxyl 3-oxide
Chen-Xi Zhang; Yu-Ying Zhang; Acta Crystallographica Section E 62 (2006) o5666–o5667; doi:10.1107/S1600536806048161

data_2211680
_publ_section_title
;
 4,4,5,5-Tetramethyl-2-(4-pyridyl)imidazolin-1-oxyl 3-oxide
;
_journal_coeditor_code           XU2158
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o5666
_journal_page_last               o5667
_journal_paper_doi               10.1107/S1600536806048161
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C12 H16 N3 O2'
_chemical_formula_sum            'C12 H16 N3 O2'
_chemical_formula_weight         234.28
_chemical_name_systematic
;
 ?
;
_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                 108.051(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.205(7)
_cell_length_b                   10.452(7)
_cell_length_c                   11.031(8)
_cell_measurement_reflns_used    664
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.6
_cell_measurement_theta_min      2.7
_cell_volume                     1228.3(14)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 1997)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.99
_diffrn_measured_fraction_theta_max 0.99
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector detector'
_diffrn_measurement_method       '\f and \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  0.088
_diffrn_reflns_av_sigmaI/netI    0.110
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            3365
_diffrn_reflns_theta_full        26.5
_diffrn_reflns_theta_max         26.5
_diffrn_reflns_theta_min         2.7
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             500
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.26
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     81
_refine_ls_number_reflns         1258
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.157
_refine_ls_R_factor_gt           0.079
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.09P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.168
_refine_ls_wR_factor_ref         0.206
_reflns_number_gt                655
_reflns_number_total             1258
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            xu2158.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      'C 2/c'
_cod_database_code               2211680
_cod_database_fobs_code          2211680