The nature of halogen...halide synthons: theoretical and crystallographic studies.
Awwadi, Firas F.; Willett, Roger D.; Peterson, Kirk A.; Twamley, Brendan; The journal of physical chemistry. A 111 (2007) 2319–2328; doi:10.1021/jp0660684

data_1516646
_publ_section_title
;
 The nature of halogen...halide synthons: theoretical and crystallographic
 studies.
;
_journal_issue                   12
_journal_name_full               'The journal of physical chemistry. A'
_journal_page_first              2319
_journal_page_last               2328
_journal_paper_doi               10.1021/jp0660684
_journal_volume                  111
_journal_year                    2007
_chemical_formula_sum            'C5 H5 Br Cl N'
_chemical_formula_weight         194.46
_space_group_IT_number           11
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 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                 95.83(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   4.3924(9)
_cell_length_b                   8.1794(16)
_cell_length_c                   9.4338(19)
_cell_measurement_temperature    295(2)
_cell_volume                     337.18(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0513
_diffrn_reflns_av_sigmaI/netI    0.0609
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            3613
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.17
_exptl_absorpt_coefficient_mu    6.381
_exptl_absorpt_correction_T_max  0.8316
_exptl_absorpt_correction_T_min  0.2505
_exptl_crystal_density_diffrn    1.915
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             188
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.774
_refine_diff_density_min         -0.366
_refine_diff_density_rms         0.136
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.104
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     43
_refine_ls_number_reflns         822
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.104
_refine_ls_R_factor_all          0.0690
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0500P)^2^+0.4057P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1078
_refine_ls_wR_factor_ref         0.1229
_reflns_number_gt                634
_reflns_number_total             822
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp0660684si20060917_081838.cif
_cod_data_source_block           bt538
_cod_database_code               1516646