Enclathration of bases by a fluorenyl host: structure, stability and selectivity
Bourne, Susan A.; Corin, Kirsten; Cruickshank, Dyanne L.; Davson, Jessica; Nassimbeni, Luigi R.; Su, Hong; Weber, Edwin; New Journal of Chemistry 35 (2011) 1556–; doi:10.1039/c1nj20241c

data_7052696
_publ_section_title
;
 Enclathration of bases by a fluorenyl host: structure, stability and
 selectivity
;
_journal_issue                   7
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1556
_journal_paper_doi               10.1039/c1nj20241c
_journal_volume                  35
_journal_year                    2011
_chemical_formula_moiety         'C32 H22 O2, 2(C5 H5 N)'
_chemical_formula_sum            'C42 H32 N2 O2'
_chemical_formula_weight         596.70
_chemical_melting_point          264.5(5)
_chemical_name_common
;
1,4-bis(9-hydroxyfluoren-9-yl)benzene. pyridine clathrate
;
_chemical_name_systematic
;
1,4-bis(9-hydroxyfluoren-9-yl)benzene. pyridine clathrate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 97.838(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.8538(3)
_cell_length_b                   10.4545(4)
_cell_length_c                   17.0843(8)
_cell_measurement_reflns_used    1763
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.7
_cell_measurement_theta_min      3.7
_cell_volume                     1566.58(11)
_computing_cell_refinement       'Collect (Nonius, 2000)'
_computing_data_collection       'Collect (Nonius, 2000)'
_computing_data_reduction        'Collect (Nonius, 2000)'
_computing_molecular_graphics    'XSEED, graphical interface to SHELX (1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Combination of phi and omega'
_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  0.0369
_diffrn_reflns_av_sigmaI/netI    0.0869
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            5192
_diffrn_reflns_theta_full        25.67
_diffrn_reflns_theta_max         25.67
_diffrn_reflns_theta_min         3.67
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count n/a
_diffrn_standards_interval_time  n/a
_diffrn_standards_number         n/a
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Clear blocks'
_exptl_crystal_F_000             628
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.183
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.899
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         2945
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.899
_refine_ls_R_factor_all          0.0882
_refine_ls_R_factor_gt           0.0399
_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^)+(0.0374P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0816
_refine_ls_wR_factor_ref         0.0935
_reflns_number_gt                1763
_reflns_number_total             2945
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1nj20241c.txt
_cod_data_source_block           hpyr
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '264-265' was changed to '264.5(5)' -
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

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_sg_symbol_H-M      'P 21/n'
_cod_database_code               7052696