Structures of hydro-, chloro-, and bromo-substituted maleimides and 2,6-diaminopyridines, and of some of their 1 : 1 heterodimers
Pilati, Tullio; Cozzi, Franco; CrystEngComm 13 (2011) 4549–; doi:10.1039/c1ce05166k

data_7206221
_publ_section_title
;
 Structures of hydro-, chloro-, and bromo-substituted maleimides and
 2,6-diaminopyridines, and of some of their 1&#x2009;:&#x2009;1
 heterodimers
;
_journal_issue                   14
_journal_name_full               CrystEngComm
_journal_page_first              4549
_journal_paper_doi               10.1039/c1ce05166k
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C5 H5 Br2 N3'
_chemical_formula_sum            'C5 H5 Br2 N3'
_chemical_formula_weight         266.94
_chemical_name_systematic
;
2,3-diamino-3,5-dibromopyridine
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.267(2)
_cell_length_b                   11.930(2)
_cell_length_c                   4.9664(10)
_cell_measurement_reflns_used    1295
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      30.48
_cell_measurement_theta_min      3.32
_cell_volume                     726.8(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics
;
ORTEP-3 (Farrugia, L.J. (1997) Jour. Appl. Cryst. 30, 565)
Mercury (Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E.,
Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006).
J. Appl. Cryst. 39, 453-457
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement
'SHELXL-97 (Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122)'
_computing_structure_solution
;
SIR2002 (Burla, M. C., Camalli, M., Carrozzini, B., Cascarano, G. L.,
Giacovazzo, C., Polidori, G. & Spagna, R. (2003).
J. Appl. Cryst. 36, 1103.)
;
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.900
_diffrn_measurement_device_type  'Bruker APEX-II CCD area detector'
_diffrn_measurement_method       '\f and \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  0.0331
_diffrn_reflns_av_sigmaI/netI    0.0303
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            4644
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         32.90
_diffrn_reflns_theta_min         2.38
_diffrn_standards_decay_%        0.00
_exptl_absorpt_coefficient_mu    11.073
_exptl_absorpt_correction_T_max  0.2407
_exptl_absorpt_correction_T_min  0.1234
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Bruker (2001). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.440
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       table
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.370
_refine_diff_density_min         -0.367
_refine_diff_density_rms         0.081
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     56
_refine_ls_number_reflns         1227
_refine_ls_number_restraints     21
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0341
_refine_ls_R_factor_gt           0.0228
_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^)+(0.0185P)^2^+0.3190P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0506
_refine_ls_wR_factor_ref         0.0544
_reflns_number_gt                982
_reflns_number_total             1227
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c1ce05166k.txt
_cod_data_source_block           cz20
_cod_database_code               7206221