Synthesis, structural characterization and antioxidative properties of aminopyrazine and imidazolopyrazine derivatives
Devillers, Ingrid; de Wergifosse, Bertrand; Bruneau, Marie-Pierre; Tinant, Bernard; Declercq, Jean-Paul; Touillaux, Roland; Rees, Jean-François; Marchand-Brynaert, Jacqueline; Journal of the Chemical Society, Perkin Transactions 2  (1999) 1481–; doi:10.1039/a900289h

data_7213015
_publ_section_title
;
 Synthesis, structural characterization and antioxidative properties of
 aminopyrazine and imidazolopyrazine derivatives
;
_journal_issue                   7
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              1481
_journal_paper_doi               10.1039/a900289h
_journal_year                    1999
_chemical_formula_sum            'C13 H13 N3 O2'
_chemical_formula_weight         243.26
_chemical_name_common            'compoud 5b'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 114.22(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.022(4)
_cell_length_b                   8.616(2)
_cell_length_c                   13.244(4)
_cell_measurement_temperature    293(2)
_cell_volume                     1251.1(7)
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoKa
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0470
_diffrn_reflns_av_sigmaI/netI    0.1656
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            1928
_diffrn_reflns_theta_max         23.50
_diffrn_reflns_theta_min         2.90
_exptl_absorpt_coefficient_mu    0.090
_exptl_crystal_density_diffrn    1.292
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.138
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.849
_refine_ls_goodness_of_fit_obs   1.217
_refine_ls_matrix_type           full
_refine_ls_number_parameters     170
_refine_ls_number_reflns         1858
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.849
_refine_ls_restrained_S_obs      1.217
_refine_ls_R_factor_all          0.1642
_refine_ls_R_factor_obs          0.0679
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[s^2^(Fo^2^)+( 0.0420P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1249
_refine_ls_wR_factor_obs         0.1054
_reflns_number_observed          749
_reflns_number_total             1858
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            900289hsup1.cif
_cod_data_source_block           jm1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w=1/[s^2^(Fo^2^)+(
0.0420P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was changed to 'calc'.
New tag '_refine_ls_weighting_details' was created. The value of the
new tag was set to 'w=1/[s^2^(Fo^2^)+( 0.0420P)^2^+0.0000P] where
P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1251.1(6)
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               7213015