Absolute structure determination as a reference for the enantiomeric resolution of racemic mixtures of cyclophosphazenes <i>via</i> chiral high-performance liquid chromatography
Coles, Simon; Davies, David; Hursthouse, Michael; Yeşilot, Serkan; Çoşut, Bünyemin; Kılıç, Adem; Acta Crystallographica Section B 65 (2009) 355–362; doi:10.1107/S0108768109006120

data_2104368
_publ_section_title
;
 Absolute structure determination as a reference for the enantiomeric
 resolution of racemic mixtures of cyclophosphazenes <i>via</i> chiral
 high-performance liquid chromatography
;
_journal_coeditor_code           RY5024
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              355
_journal_page_last               362
_journal_paper_doi               10.1107/S0108768109006120
_journal_volume                  65
_journal_year                    2009
_chemical_formula_sum            'C18 H24 N5 O2 P3 S2'
_chemical_formula_weight         499.45
_space_group_IT_number           76
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4w'
_symmetry_space_group_name_H-M   'P 41'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.49120(10)
_cell_length_b                   11.49120(10)
_cell_length_c                   16.7890(2)
_cell_measurement_reflns_used    25190
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     2216.95(4)
_computing_cell_refinement       'DENZO, COLLECT'
_computing_data_collection
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, 1998)'
_computing_data_reduction        'DENZO, COLLECT'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD Area Detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0308
_diffrn_reflns_av_sigmaI/netI    0.0181
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            41619
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.49
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.483
_exptl_absorpt_correction_T_max  0.8302
_exptl_absorpt_correction_T_min  0.8118
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10 (Sheldrick, G.M., 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.496
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.159
_refine_diff_density_min         -0.267
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         5057
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0193
_refine_ls_R_factor_gt           0.0188
_refine_ls_shift/su_max          0.028
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0283P)^2^+0.4819P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0491
_refine_ls_wR_factor_ref         0.0494
_reflns_number_gt                4976
_reflns_number_total             5057
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ry5024.cif
_cod_data_source_block           3a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
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 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P4(1)
_cod_database_code               2104368
_cod_database_fobs_code          2104368