Functional helquats: helical cationic dyes with marked, switchable chiroptical properties in the visible region.
Reyes-Gutiérrez, Paul E; Jirásek, Michael; Severa, Lukáš; Novotná, Pavlína; Koval, Dušan; Sázelová, Petra; Vávra, Jan; Meyer, Andreas; Císařová, Ivana; Šaman, David; Pohl, Radek; Štěpánek, Petr; Slavíček, Petr; Coe, Benjamin J.; Hájek, Miroslav; Kašička, Václav; Urbanová, Marie; Teplý, Filip; Chemical communications (Cambridge, England) 51 (2015) 1583–1586; doi:10.1039/c4cc08967g

data_7116245
_publ_section_title
;
 Functional helquats: helical cationic dyes with marked, switchable
 chiroptical properties in the visible region.
;
_journal_issue                   9
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              1583
_journal_page_last               1586
_journal_paper_doi               10.1039/c4cc08967g
_journal_volume                  51
_journal_year                    2015
_chemical_compound_source        'synthesized by the authors'
_chemical_formula_moiety         'C42 H44 N4, 2(C F3 O3 S)'
_chemical_formula_sum            'C44 H44 F6 N4 O6 S2'
_chemical_formula_weight         902.95
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-05-20 deposited with the CCDC.
2014-12-15 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   25.3083(18)
_cell_length_b                   17.1165(12)
_cell_length_c                   42.198(3)
_cell_measurement_reflns_used    8325
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.6
_cell_measurement_theta_min      2.45
_cell_volume                     18280(2)
_computing_cell_refinement       'SAINT V8.27B (Bruker AXS Inc., 2012)'
_computing_data_collection       'Bruker Instrument Service v2012.12.0.3'
_computing_data_reduction        'SAINT V8.27B (Bruker AXS Inc., 2012)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0949
_diffrn_reflns_av_sigmaI/netI    0.1243
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       52
_diffrn_reflns_limit_l_min       -52
_diffrn_reflns_number            96260
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.26
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.191
_exptl_absorpt_correction_T_max  0.9842
_exptl_absorpt_correction_T_min  0.9018
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            violet
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             7520
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.08
_platon_squeeze_details
;
There are heavilly disordered triflate anions in the unit cell 
accompany with even more disordered solvents. The contributions
of solvent were removed to enable to refine the important
helquate molecule.
;
_refine_diff_density_max         1.071
_refine_diff_density_min         -0.884
_refine_diff_density_rms         0.095
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1105
_refine_ls_number_reflns         17955
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.1946
_refine_ls_R_factor_gt           0.1056
_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^)+(0.1525P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2538
_refine_ls_wR_factor_ref         0.2946
_reflns_number_gt                8822
_reflns_number_total             17955
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c4cc08967g2.cif
_cod_data_source_block           pr274_teply_sqd
_cod_depositor_comments
'Adding full bibliography for 7116236--7116249.cif.'
_cod_database_code               7116245