Anion-controlled assemblies of C–H⋯O hydrogen bonded grid, stair or bilayer structures by L-shaped pyridinium salts
Lee, Chia-Hao; Su, Fang-Yi; Lin, Yi-Hsiu; Chou, Chih-Ho; Lee, Kwang-Ming; CrystEngComm 13 (2011) 2318–; doi:10.1039/c0ce00610f

data_7205671
_publ_section_title
;
 Anion-controlled assemblies of C--H&#x22EF;O hydrogen bonded grid,
 stair or bilayer structures by L-shaped pyridinium salts
;
_journal_issue                   7
_journal_name_full               CrystEngComm
_journal_page_first              2318
_journal_paper_doi               10.1039/c0ce00610f
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C10 H14 Br N2 O3.5'
_chemical_formula_weight         298.14
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 129.083(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   30.056(6)
_cell_length_b                   5.1055(9)
_cell_length_c                   20.239(4)
_cell_measurement_reflns_used    7702
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.7058
_cell_measurement_theta_min      2.5930
_cell_volume                     2410.7(8)
_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 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0316
_diffrn_reflns_av_sigmaI/netI    0.0199
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -38
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            17929
_diffrn_reflns_theta_full        26.75
_diffrn_reflns_theta_max         26.75
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    3.410
_exptl_absorpt_correction_T_max  0.9486
_exptl_absorpt_correction_T_min  0.8374
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.643
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             1208
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         1.911
_refine_diff_density_min         -0.862
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     151
_refine_ls_number_reflns         2579
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0424
_refine_ls_R_factor_gt           0.0337
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0379P)^2^+14.7306P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0817
_refine_ls_wR_factor_ref         0.0880
_reflns_number_gt                2227
_reflns_number_total             2579
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ce00610f.txt
_cod_data_source_block           Br_4
_cod_depositor_comments
;
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 
;
_cod_original_formula_sum        'C10 H14 Br N2 O3.50'
_cod_database_code               7205671