Achieving conformational control over C-C, C-N and C-O bonds in biaryls, N,N'-diarylureas and diaryl ethers: advantages of a relay axis.
Betson, Mark S; Bracegirdle, Ann; Clayden, Jonathan; Helliwell, Madeleine; Lund, Andrew; Pickworth, Mark; Snape, Timothy J; Worrall, Christopher P; Chemical communications (Cambridge, England)  (2007) 754–756; doi:10.1039/b614618j

data_7101707
_publ_section_title
;
 Achieving conformational control over C-C, C-N and C-O bonds in
 biaryls, N,N'-diarylureas and diaryl ethers: advantages of a relay
 axis.
;
_journal_issue                   7
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              754
_journal_page_last               756
_journal_paper_doi               10.1039/b614618j
_journal_year                    2007
_chemical_formula_sum            'C23 H24.5 N2 O2.25 S'
_chemical_formula_weight         397.01
_chemical_name_systematic
;
?
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 108.65(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.932(6)
_cell_length_b                   8.345(3)
_cell_length_c                   10.856(3)
_cell_measurement_reflns_used    1230
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      3.27
_cell_volume                     2140.3(10)
_computing_cell_refinement       CrysalisCCD
_computing_data_collection       CrysalisCCD
_computing_data_reduction        CrysalisRED
_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      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD diffractometer'
_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  0.0794
_diffrn_reflns_av_sigmaI/netI    0.1408
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            6959
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         3.38
_exptl_absorpt_coefficient_mu    0.173
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.232
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             842
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.170
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.802
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         2700
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.802
_refine_ls_R_factor_all          0.0997
_refine_ls_R_factor_gt           0.0425
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0322P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0761
_refine_ls_wR_factor_ref         0.0955
_reflns_number_gt                1230
_reflns_number_total             2700
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b614618j.txt
_cod_data_source_block           s1824_dc
_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      C2
_cod_original_formula_sum        'C23 H24.50 N2 O2.25 S'
_cod_database_code               7101707