Anion-controlled assemble of C‒H⋯X hydrogen bonded helical tubes or catemers by crescent imidazolium salts
Lee, Kwang-Ming; Chen, Jack C. C.; Huang, Chao-June; Lin, Ivan J. B.; CrystEngComm 11 (2009) 2804–; doi:10.1039/b911665f

data_7201442
_publ_section_title
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 Anion-controlled assemble of C--H&#x22EF;X hydrogen bonded helical
 tubes or catemers by crescent imidazolium salts
;
_journal_issue                   12
_journal_name_full               CrystEngComm
_journal_page_first              2804
_journal_paper_doi               10.1039/b911665f
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C9 H10 F6 N5 O P'
_chemical_formula_weight         349.19
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 104.745(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.9852(16)
_cell_length_b                   24.937(2)
_cell_length_c                   8.9006(12)
_cell_measurement_reflns_used    21
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      12.92
_cell_measurement_theta_min      10.01
_cell_volume                     2787.2(6)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker XSCANS'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXS'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\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  0.0282
_diffrn_reflns_av_sigmaI/netI    0.0262
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            11693
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.62
_diffrn_standards_decay_%        3.94
_diffrn_standards_interval_count 397
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.275
_exptl_absorpt_correction_T_max  0.8638
_exptl_absorpt_correction_T_min  0.7837
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.664
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             1408
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.291
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.041
_refine_ls_extinction_coef       0.0035(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     508
_refine_ls_number_reflns         4925
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0609
_refine_ls_R_factor_gt           0.0432
_refine_ls_shift/su_max          0.106
_refine_ls_shift/su_mean         0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0583P)^2^+0.9559P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1078
_refine_ls_wR_factor_ref         0.1181
_reflns_number_gt                3701
_reflns_number_total             4925
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b911665f.txt
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7201442