Synthon trends according to acid strength and geometry in salts of N-heterocyclic bases
Valdo, Ana Karoline Silva Medanha; Sarotti, Ariel Marcelo; Martins, Felipe Terra; CrystEngComm  (2017) –; doi:10.1039/C7CE01490B

data_7229192
_publ_section_title
;
 Synthon trends according to acid strength and geometry in salts of
 N-heterocyclic bases
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/C7CE01490B
_journal_year                    2017
_chemical_formula_sum            'C12 H12 Br2 N2'
_chemical_formula_weight         344.04
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-08-14 deposited with the CCDC.
2017-09-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.053(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.1052(8)
_cell_length_b                   10.2491(15)
_cell_length_c                   12.6953(18)
_cell_measurement_reflns_used    1210
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.08
_cell_measurement_theta_min      2.56
_cell_volume                     663.32(17)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0441
_diffrn_reflns_av_unetI/netI     0.0509
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2912
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.332
_diffrn_reflns_theta_min         2.555
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    6.086
_exptl_absorpt_correction_T_max  0.784
_exptl_absorpt_correction_T_min  0.646
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Blessing, R. H. (1995) Acta Cryst., A51, 33-38'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.722
_exptl_crystal_description       plate
_exptl_crystal_F_000             336
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.492
_refine_diff_density_min         -0.542
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     82
_refine_ls_number_reflns         1203
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0444
_refine_ls_R_factor_gt           0.0367
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0569P)^2^+0.0582P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0993
_refine_ls_wR_factor_ref         0.1050
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1011
_reflns_number_total             1203
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ce01490b2.cif
_cod_data_source_block           B1
_cod_database_code               7229192
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              79936