[6]Saddlequat: a [6]helquat captured on its racemization pathway
Adriaenssens, Louis; Severa, Lukáš; Koval, Dušan; Císařová, Ivana; Belmonte, Marta Martínez; Escudero-Adán, Eduardo C.; Novotná, Pavlína; Sázelová, Petra; Vávra, Jan; Pohl, Radek; Šaman, David; Urbanová, Marie; Kašička, Václav; Teplý, Filip; Chemical Science 2 (2011) 2314–; doi:10.1039/c1sc00468a

data_1515534
_publ_section_title
;
 [6]Saddlequat: a [6]helquat captured on its racemization pathway
;
_journal_issue                   12
_journal_name_full               'Chemical Science'
_journal_page_first              2314
_journal_paper_doi               10.1039/c1sc00468a
_journal_volume                  2
_journal_year                    2011
_chemical_compound_source        'synthesized by the authors'
_chemical_formula_moiety         'C27 H26 N2, 2(C F3 O3 S)'
_chemical_formula_sum            'C29 H26 F6 N2 O6 S2'
_chemical_formula_weight         676.64
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 109.934(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0740(6)
_cell_length_b                   16.5460(11)
_cell_length_c                   20.7090(17)
_cell_measurement_reflns_used    61028
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     2922.9(4)
_computing_cell_refinement       'COLLECT and DENZO'
_computing_data_collection
'COLLECT (Hooft, 1998) and DENZO (Otwinowski & Minor, 1997)'
_computing_data_reduction        'COLLECT and DENZO'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Nonius KappaCCD area detector'
_diffrn_measurement_method       '\f and \w scans to fill the Ewald sphere'
_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  0.1019
_diffrn_reflns_av_sigmaI/netI    0.0364
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            56411
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         1.62
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.268
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.433
_refine_diff_density_min         -0.616
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     406
_refine_ls_number_reflns         6718
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0528
_refine_ls_R_factor_gt           0.0416
_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^)+(0.0420P)^2^+2.5505P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1027
_refine_ls_wR_factor_ref         0.1119
_reflns_number_gt                5629
_reflns_number_total             6718
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c1sc00468a.txt
_cod_data_source_block           rac-5-tfo
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1515534