An Improved Understanding of the Reaction of Bis(bromomethyl)quinoxaline 1-N-Oxides with Amines Using Substituent Effects
Kathryn M. Evans; Alexandra M. Z. Slawin; Tomas Lebl; Douglas Philp; Nicholas J. Westwood; Journal of Organic Chemistry 72 (2007) 3186–3193; doi:10.1021/jo062380y

data_4022761
_publ_section_title
;
 An Improved Understanding of the Reaction of Bis(bromomethyl)quinoxaline
 1-N-Oxides with Amines Using Substituent Effects
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3186
_journal_page_last               3193
_journal_paper_doi               10.1021/jo062380y
_journal_volume                  72
_journal_year                    2007
_chemical_formula_moiety         'C10 H7 Br2 N3 O3'
_chemical_formula_sum            'C10 H7 Br2 N3 O3'
_chemical_formula_weight         377.01
_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                 111.789(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3962(19)
_cell_length_b                   24.731(6)
_cell_length_c                   6.9611(17)
_cell_measurement_reflns_used    4117
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      25.3491
_cell_measurement_theta_min      2.4686
_cell_volume                     1182.3(5)
_computing_cell_refinement       'CrystalClear (Rigaku Corp., 2004)'
_computing_data_collection       'CrystalClear (Rigaku Corp., 2004)'
_computing_data_reduction        'CrystalClear (Rigaku Corp., 2004)'
_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      93(2)
_diffrn_detector_area_resol_mean 0.83
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       dtprofit.ref
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0459
_diffrn_reflns_av_sigmaI/netI    0.0405
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            7435
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         2.97
_exptl_absorpt_coefficient_mu    6.860
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.3016
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    2.118
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Platelet
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.1000
_exptl_crystal_size_mid          0.1000
_exptl_crystal_size_min          0.0100
_refine_diff_density_max         0.706
_refine_diff_density_min         -0.866
_refine_diff_density_rms         0.102
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         2145
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0360
_refine_ls_R_factor_gt           0.0304
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0319P)^2^+0.2582P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0666
_refine_ls_wR_factor_ref         0.0690
_reflns_number_gt                1908
_reflns_number_total             2145
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo062380ysi20061119_054552.cif
_cod_data_source_block           13
_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 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4022761