[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_1515532
_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_absolute_configuration ad
_chemical_compound_source        'synthesized by the authors'
_chemical_formula_moiety         'C27 H26 N2, 2(Cl O4), H2 O'
_chemical_formula_sum            'C27 H28 Cl2 N2 O9'
_chemical_formula_weight         595.41
_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   difmap
_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                   11.0841(2)
_cell_length_b                   13.3658(2)
_cell_length_c                   17.3210(3)
_cell_measurement_reflns_used    35186
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      62.2845
_cell_measurement_theta_min      3.3044
_cell_volume                     2566.07(7)
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 10.3784
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0303
_diffrn_reflns_av_sigmaI/netI    0.0125
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            41492
_diffrn_reflns_theta_full        64.99
_diffrn_reflns_theta_max         64.99
_diffrn_reflns_theta_min         4.18
_exptl_absorpt_coefficient_mu    2.807
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.48905
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.541
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1240
_exptl_crystal_size_max          0.256
_exptl_crystal_size_mid          0.234
_exptl_crystal_size_min          0.142
_refine_diff_density_max         0.323
_refine_diff_density_min         -0.634
_refine_diff_density_rms         0.055
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.001(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     361
_refine_ls_number_reflns         4355
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0305
_refine_ls_R_factor_gt           0.0301
_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^)+(0.0606P)^2^+1.2983P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0904
_refine_ls_wR_factor_ref         0.0911
_reflns_number_gt                4300
_reflns_number_total             4355
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c1sc00468a.txt
_cod_data_source_block           p-5-clo4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/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_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1515532