Self-assembly of an unpolar enantiomerically pure helicate-type metalla-cryptand
Albrecht, Markus; Schmid, Sören; deGroot, Marita; Weis, Patrick; Fröhlich, Roland; Chemical Communications (Cambridge, United Kingdom)  (2003) 2526–2527; doi:10.1039/b309026d

data_7113648
_publ_section_title
;
 Self-assembly of an unpolar enantiomerically pure helicate-type
 metalla-cryptand
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   20
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              2526
_journal_page_last               2527
_journal_paper_doi               10.1039/b309026d
_journal_year                    2003
_chemical_formula_sum            'C69 H56 Br6 Ga2 O19'
_chemical_formula_weight         1808.04
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   13.526(1)
_cell_length_b                   18.122(1)
_cell_length_c                   34.335(1)
_cell_measurement_temperature    198(2)
_cell_volume                     8416.1(8)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SCHAKAL (Keller, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      198(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode Nonius FR591'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0820
_diffrn_reflns_av_sigmaI/netI    0.1067
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            26673
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         1.62
_exptl_absorpt_coefficient_mu    3.548
_exptl_absorpt_correction_T_max  0.9010
_exptl_absorpt_correction_T_min  0.3698
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SORTAV (Blessing, 1995 & 1997)'
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.427
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             3576
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.277
_refine_diff_density_min         -0.561
_refine_diff_density_rms         0.200
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.013(16)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    'refined as riding atoms'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     871
_refine_ls_number_reflns         10986
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.1023
_refine_ls_R_factor_gt           0.0694
_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^)+(0.1146P)^2^+14.7849P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1845
_refine_ls_wR_factor_ref         0.2033
_reflns_number_gt                8213
_reflns_number_total             10986
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7104860
_cod_data_source_file            b309026d.txt
_cod_data_source_block           fro2483
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7113648