Exploring the structural landscape of 2-aminopyrazines via co-crystallizations
Aakeröy, Christer B.; Chopade, Prashant D.; Ganser, Claudia; Rajbanshi, Arbin; Desper, John; CrystEngComm 14 (2012) 5845–; doi:10.1039/c2ce25516b

data_7208521
_publ_section_title
;
 Exploring the structural landscape of 2-aminopyrazines via
 co-crystallizations
;
_journal_issue                   18
_journal_name_full               CrystEngComm
_journal_page_first              5845
_journal_paper_doi               10.1039/c2ce25516b
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety
;
(C4 H3 N3 Br2) (C7 H6 O4)
;
_chemical_formula_sum            'C11 H9 Br2 N3 O4'
_chemical_formula_weight         407.03
_chemical_name_systematic
;
P13 2,6-Br2-3-NH2-pyrazine, 2,5-(HO)2-PhCOOH
;
_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                87.951(3)
_cell_angle_beta                 86.435(3)
_cell_angle_gamma                72.915(4)
_cell_formula_units_Z            2
_cell_length_a                   6.8754(7)
_cell_length_b                   7.1197(7)
_cell_length_c                   13.8665(14)
_cell_measurement_reflns_used    3146
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      31.48
_cell_measurement_theta_min      2.94
_cell_volume                     647.46(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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      120(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.928
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0481
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            6835
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         31.71
_diffrn_reflns_theta_min         2.94
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.277
_exptl_absorpt_correction_T_max  0.6336
_exptl_absorpt_correction_T_min  0.1880
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   TWINABS
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    2.088
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             396
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.123
_refine_diff_density_min         -1.147
_refine_diff_density_rms         0.179
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     188
_refine_ls_number_reflns         6835
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0602
_refine_ls_R_factor_gt           0.0429
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0850P)^2^+0.0250P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1163
_refine_ls_wR_factor_ref         0.1280
_reflns_number_gt                5403
_reflns_number_total             6835
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce25516b.txt
_cod_data_source_block           B3.A7
_cod_depositor_comments
;
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.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7208521