Methylene-Bridged Glycoluril Dimers: Synthetic Methods
Anxin Wu; Arindam Chakraborty; Dariusz Witt; Jason Lagona; Fehmi Damkaci; Marie A. Ofori; Jessica K. Chiles; James C. Fettinger; Lyle Isaacs; Journal of Organic Chemistry 67 (2002) 5817–5830; doi:10.1021/jo0258958

data_4022244
_publ_section_title
;
 Methylene-Bridged Glycoluril Dimers: Synthetic Methods
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5817
_journal_page_last               5830
_journal_paper_doi               10.1021/jo0258958
_journal_volume                  67
_journal_year                    2002
_chemical_formula_sum            'C42 H48 N8 O12'
_chemical_formula_weight         856.88
_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                 105.506(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.9952(17)
_cell_length_b                   16.8963(13)
_cell_length_c                   11.9470(9)
_cell_measurement_reflns_used    6806
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      27.53
_cell_measurement_theta_min      2.15
_cell_volume                     4083.8(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0399
_diffrn_reflns_av_sigmaI/netI    0.0331
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            27821
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.57
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_type   'Empirical, SADABS'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.394
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1808
_exptl_crystal_size_max          0.338
_exptl_crystal_size_mid          0.337
_exptl_crystal_size_min          0.233
_refine_diff_density_max         0.485
_refine_diff_density_min         -0.362
_refine_diff_density_rms         0.079
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     760
_refine_ls_number_reflns         7192
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0774
_refine_ls_R_factor_gt           0.0554
_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^)+(0.0994P)^2^+0.6457P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1372
_refine_ls_wR_factor_ref         0.1542
_reflns_number_gt                5379
_reflns_number_total             7192
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0258958_s2_3.cif
_cod_data_source_block           38s
_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      'P 21/c'
_cod_database_code               4022244