Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding
Li, Wei-Liang; Wu, An-Kai; Lee, Kwang-Ming; CrystEngComm 14 (2012) 6072–; doi:10.1039/c2ce25695a

data_7214654
_publ_section_title
;
 Anion-controlled dimerized rectangular, herringbone and tape building
 blocks by L-shaped diamide-substituted pyridinium salts via N--H&#x22EF;O
 and C--H&#x22EF;O hydrogen bonding
;
_journal_issue                   18
_journal_name_full               CrystEngComm
_journal_page_first              6072
_journal_paper_doi               10.1039/c2ce25695a
_journal_volume                  14
_journal_year                    2012
_chemical_formula_sum            'C8 H10 Br N3 O2'
_chemical_formula_weight         260.10
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 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                 109.0290(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.03600(10)
_cell_length_b                   28.8208(7)
_cell_length_c                   6.9016(2)
_cell_measurement_reflns_used    3119
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.3810
_cell_measurement_theta_min      3.4277
_cell_volume                     946.97(4)
_computing_cell_refinement       'SAINT V7.34A (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2010)'
_computing_data_reduction        'SAINT V7.34A (Bruker AXS, 2006)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.972
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_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  0.0530
_diffrn_reflns_av_sigmaI/netI    0.0700
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       36
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            3519
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         2.83
_exptl_absorpt_coefficient_mu    4.318
_exptl_absorpt_correction_T_max  0.9486
_exptl_absorpt_correction_T_min  0.5061
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.824
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lamellar
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.899
_refine_diff_density_min         -1.678
_refine_diff_density_rms         0.158
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.41(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.115
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         1625
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.114
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0464
_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^)+(0.0809P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1194
_refine_ls_wR_factor_ref         0.1331
_reflns_number_gt                1529
_reflns_number_total             1625
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce25695a.txt
_cod_data_source_block           br
_cod_depositor_comments
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The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
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_cod_database_code               7214654