Conversion from a heterochiral [2 + 2] coaxially nested double-helical column to a cationic spiral staircase stimulated by an ionic liquid anion.
Qin, Jianhua; Jia, Yanyuan; Li, Huijun; Zhao, Bei; Wu, Dongqing; Zang, Shuangquan; Hou, Hongwei; Fan, Yaoting; Inorganic chemistry 53 (2014) 685–687; doi:10.1021/ic402598p

data_4337087
_publ_section_title
;
 Conversion from a heterochiral [2 + 2] coaxially nested double-helical
 column to a cationic spiral staircase stimulated by an ionic liquid
 anion.
;
_journal_issue                   2
_journal_name_full               'Inorganic chemistry'
_journal_page_first              685
_journal_page_last               687
_journal_paper_doi               10.1021/ic402598p
_journal_volume                  53
_journal_year                    2014
_chemical_formula_sum            'C76 H72 Br4 Mn8 N44 O22'
_chemical_formula_weight         2712.94
_chemical_name_systematic
;

 ?

;
_space_group_IT_number           106
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4c -2ab'
_symmetry_space_group_name_H-M   'P 42 b c'
_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            2
_cell_length_a                   19.870(3)
_cell_length_b                   19.870(3)
_cell_length_c                   12.749(3)
_cell_measurement_reflns_used    10825
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.8884
_cell_measurement_theta_min      2.0498
_cell_volume                     5033.5(16)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_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 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w 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  0.0466
_diffrn_reflns_av_sigmaI/netI    0.0494
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            13908
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    2.649
_exptl_absorpt_correction_T_max  0.5459
_exptl_absorpt_correction_T_min  0.4662
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            YELLOW
_exptl_crystal_density_diffrn    1.790
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             2704
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.685
_refine_diff_density_min         -0.391
_refine_diff_density_rms         0.090
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.589(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         4033
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0510
_refine_ls_R_factor_gt           0.0446
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0573P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1065
_refine_ls_wR_factor_ref         0.1102
_reflns_number_gt                3638
_reflns_number_total             4033
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic402598p_si_002.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to
/usr/data/users/saulius/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' according to
/usr/data/users/saulius/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_refine_ls_hydrogen_treatment' value 'CONSTR' changed
to 'constr' according to
/usr/data/users/saulius/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        5033.5(14)
_cod_original_sg_symbol_H-M      P4(2)bc
_cod_database_code               4337087