New supramolecular organization for a glycoluril: chiral hydrogen-bonded ribbons
Johnson, Darren W.; Palmer, Liam C.; Hof, Fraser; Iovine, Peter M.; Rebek, Julius; Chemical Communications  (2002) 2228–; doi:10.1039/b206648c

data_7111245
_publ_section_title
;
 New supramolecular organization for a glycoluril: chiral hydrogen-bonded
 ribbons
;
_journal_issue                   19
_journal_name_full               'Chemical Communications'
_journal_page_first              2228
_journal_paper_doi               10.1039/b206648c
_journal_year                    2002
_chemical_compound_source        synthetic
_chemical_formula_sum            'C26 H30 N4 O8'
_chemical_formula_weight         526.54
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 116.54(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.631(5)
_cell_length_b                   10.602(4)
_cell_length_c                   11.995(5)
_cell_measurement_reflns_used    3252
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.25
_cell_measurement_theta_min      1.9
_cell_volume                     1323.3(10)
_computing_cell_refinement
;
SMART (Siemens, 1995), SAINT (Siemens, 1995)
;
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction
;
SAINT (Siemens, 1995), XPREP (Siemens, 1995)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  '3 circle diffractometer'
_diffrn_measurement_method
;
omega scans with profile analysis
;
_diffrn_radiation_detector       'CCD area detector'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0203
_diffrn_reflns_av_sigmaI/netI    0.0417
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4642
_diffrn_reflns_theta_full        23.25
_diffrn_reflns_theta_max         23.25
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.759
_exptl_absorpt_correction_type   psi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block
_exptl_crystal_F_000             556
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.209
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     344
_refine_ls_number_reflns         3544
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0391
_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^)+(0.0523P)^2^+0.2055P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0986
_refine_ls_wR_factor_ref         0.1014
_reflns_number_gt                3306
_reflns_number_total             3544
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b206648csup1.cif
_cod_data_source_block           glycods
_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_cell_volume        1323.3(9)
_cod_original_sg_symbol_H-M      P(2)1
_cod_database_code               7111245