SNH Approach in the Synthesis of Nitronyl Nitroxides
Oleg N. Chupakhin; Irina A. Utepova; Mikhail V. Varaksin; Evgeny V. Tretyakov; Galina V. Romanenko; Dmitry V. Stass; Victor I. Ovcharenko; Journal of Organic Chemistry 74 (2009) 2870–2872; doi:10.1021/jo900085s

data_4024456
_publ_section_title
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SNH Approach in the Synthesis of Nitronyl Nitroxides
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2870
_journal_page_last               2872
_journal_paper_doi               10.1021/jo900085s
_journal_volume                  74
_journal_year                    2009
_chemical_formula_sum            'C22 H28 N6 O6'
_chemical_formula_weight         472.50
_chemical_name_systematic
; 
 2,3-Bis(4,4,5,5-tetramethyl-3-oxid-1-oxyl-4,5
 -dihydro-1H-imidazol-2-yl)quinoxaline 1,4-dioxide
;
_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'
_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                 95.388(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3405(9)
_cell_length_b                   17.496(2)
_cell_length_c                   17.596(2)
_cell_measurement_reflns_used    3504
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      22.45
_cell_measurement_theta_min      2.33
_cell_volume                     2249.8(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0833
_diffrn_reflns_av_sigmaI/netI    0.0660
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            22257
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         2.33
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.395
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1000
_refine_diff_density_max         0.208
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.049
_refine_ls_extinction_coef       0.0003(9)
_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   0.999
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     420
_refine_ls_number_reflns         4595
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.0876
_refine_ls_R_factor_gt           0.0549
_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^)+(0.0603P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1167
_refine_ls_wR_factor_ref         0.1284
_reflns_number_gt                3055
_reflns_number_total             4595
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo900085s_si_010.cif
_cod_data_source_block           881a
_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 
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_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4024456