Bis(benzimidazolium) axles and crown ether wheels: a versatile templating pair for the formation of [2]rotaxane molecular shuttles
Zhu, Kelong; Vukotic, V. Nicholas; Noujeim, Nadim; Loeb, Stephen J.; Chemical Science 3 (2012) 3265–; doi:10.1039/c2sc20986a

data_1515241
_publ_section_title
;
 Bis(benzimidazolium) axles and crown ether wheels: a versatile templating
 pair for the formation of [2]rotaxane molecular shuttles
;
_journal_issue                   11
_journal_name_full               'Chemical Science'
_journal_page_first              3265
_journal_paper_doi               10.1039/c2sc20986a
_journal_volume                  3
_journal_year                    2012
_chemical_formula_sum            'C67 H74 B F4 N3 O8'
_chemical_formula_weight         1136.10
_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                 94.3180(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.2420(13)
_cell_length_b                   18.9077(16)
_cell_length_c                   19.5236(16)
_cell_measurement_reflns_used    642
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.52
_cell_volume                     5978.7(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL XPREP'
_computing_molecular_graphics    'Bruker SHELXTL XP'
_computing_publication_material  'Bruker SHELXTL XCIF'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-I CCD'
_diffrn_measurement_method       'phi and omega 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  0.1217
_diffrn_reflns_av_sigmaI/netI    0.0895
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            56650
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.52
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9910
_exptl_absorpt_correction_T_min  0.9822
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2408
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.659
_refine_diff_density_min         -0.304
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.011
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     794
_refine_ls_number_reflns         10527
_refine_ls_number_restraints     100
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.1417
_refine_ls_R_factor_gt           0.0763
_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^)+(0.1143P)^2^+3.9213P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1953
_refine_ls_wR_factor_ref         0.2443
_reflns_number_gt                5789
_reflns_number_total             10527
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2sc20986a.txt
_cod_data_source_block           kz35
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1515241