22 Space-group changes
Clemente, Dore Augusto; Marzotto, Armando; Acta Crystallographica Section B 59 (2003) 43–50; doi:10.1107/S0108768102022668

data_2103797
_publ_section_title
;
 22 Space-group changes
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              43
_journal_page_last               50
_journal_paper_doi               10.1107/S0108768102022668
_journal_volume                  59
_journal_year                    2003
_chemical_formula_sum            'C47 H63 N O6 Si'
_chemical_formula_weight         766.07
_chemical_name_systematic
;trans-2-(alpha-Cumyl)cyclohexyl
 2-(1,2-bis(benzyloxy)ethyl)-5-(tri-isopropylsily
 l)-2,3-dihydro-4H-4-pyridone-1-carboxylate
;
_space_group_IT_number           15
_symmetry_space_group_name_Hall  '-I 2ya'
_symmetry_space_group_name_H-M   'I 1 2/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 114.65(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   33.990(4)
_cell_length_b                   9.5179(13)
_cell_length_c                   29.467(4)
_cell_measurement_temperature    293(2)
_cell_volume                     8664(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.363
_diffrn_measured_fraction_theta_max 0.363
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0196
_diffrn_reflns_av_sigmaI/netI    0.0839
_diffrn_reflns_limit_h_max       55
_diffrn_reflns_limit_h_min       -55
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       45
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_number            41716
_diffrn_reflns_theta_full        45.10
_diffrn_reflns_theta_max         45.10
_diffrn_reflns_theta_min         1.32
_exptl_absorpt_coefficient_mu    0.102
_exptl_crystal_density_diffrn    1.175
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             3312
_refine_diff_density_max         1.142
_refine_diff_density_min         -0.240
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.130
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     473
_refine_ls_number_reflns         13023
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.130
_refine_ls_R_factor_all          0.0341
_refine_ls_R_factor_gt           0.0324
_refine_ls_shift/su_max          13.453
_refine_ls_shift/su_mean         0.028
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1198
_refine_ls_wR_factor_ref         0.2081
_reflns_number_gt                11934
_reflns_number_total             13023
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            an0613.cif
_cod_data_source_block           horbiz
_cod_original_cell_volume        8664(2)
_cod_original_sg_symbol_H-M      'I 2/a'
_cod_database_code               2103797