Unexpected helicity control and helix inversion: homochiral helical nanotubes consisting of an achiral ligand
Kaiju Wei; Jia Ni; Yuanzeng Min; Siming Chen; Yangzhong Liu; Chem.Commun. 49 (2013) 8220–; doi:10.1039/c3cc43898h

data_7109713
_publ_section_title
;
 Unexpected helicity control and helix inversion: homochiral helical
 nanotubes consisting of an achiral ligand
;
_journal_name_full               Chem.Commun.
_journal_page_first              8220
_journal_paper_doi               10.1039/c3cc43898h
_journal_volume                  49
_journal_year                    2013
_chemical_formula_sum            'C26 H23 Cd N9 O7'
_chemical_formula_weight         685.93
_chemical_name_systematic
;
?
;
_space_group_IT_number           178
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 61 2 (0 0 5)'
_symmetry_space_group_name_H-M   'P 61 2 2'
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   16.0598(6)
_cell_length_b                   16.0598(6)
_cell_length_c                   21.0558(15)
_cell_measurement_temperature    293(2)
_cell_volume                     4703.1(4)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'ORTEP-II (Johnson, 1976)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX area-dectector diffractometer'
_diffrn_measurement_method       '\f and \w-scan'
_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  0.0671
_diffrn_reflns_av_sigmaI/netI    0.0387
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            24719
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         1.46
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.752
_exptl_absorpt_correction_T_max  0.9020
_exptl_absorpt_correction_T_min  0.8955
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2002)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.453
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       octahedron
_exptl_crystal_F_000             2076
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.765
_refine_diff_density_min         -0.360
_refine_diff_density_rms         0.198
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.147
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         2773
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.147
_refine_ls_R_factor_all          0.1052
_refine_ls_R_factor_gt           0.0708
_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^)+(0.1097P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1778
_refine_ls_wR_factor_ref         0.2107
_reflns_number_gt                1928
_reflns_number_total             2773
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc43898h.txt
_cod_data_source_block           complex_1b
_cod_original_sg_symbol_H-M      P6(1)22
_cod_database_code               7109713