Constitutional self-sorting of homochiral supramolecular helical single crystals from achiral components.
Dumitru, Florina; Legrand, Yves-Marie; Van der Lee, Arie; Barboiu, Mihail; Chemical communications (Cambridge, England) 34 (2009) 2667–2669; doi:10.1039/b822619a

data_7104402
_publ_section_title
;
 Constitutional self-sorting of homochiral supramolecular helical
 single crystals from achiral components.
;
_journal_issue                   19
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2667
_journal_page_last               2669
_journal_paper_doi               10.1039/b822619a
_journal_volume                  34
_journal_year                    2009
_chemical_formula_moiety         'C38 H30 Co N6, C6 H6, 2(BF4)'
_chemical_formula_sum            'C44 H36 B2 Co F8 N6'
_chemical_formula_weight         881.35
_space_group_IT_number           54
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2bc 2b'
_symmetry_space_group_name_H-M   'P b c b'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.4612(5)
_cell_length_b                   15.4657(7)
_cell_length_c                   21.0453(9)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    175
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     4055.9(3)
_computing_cell_refinement       'CrysAlis RED, (Oxford Diffraction, 2002)'
_computing_data_collection       'Xcalibur, (Oxford Diffraction, 2002)'
_computing_data_reduction        'CrysAlis RED, (Oxford Diffraction, 2002)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SHELXS 86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      173
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.944
_diffrn_measurement_device       'Oxford Diffraction XCALIBUR'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.051
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            78751
_diffrn_reflns_theta_full        30.789
_diffrn_reflns_theta_max         32.409
_diffrn_reflns_theta_min         3.248
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.501
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.90
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.5 (release 08-05-2007 CrysAlis171 .NET)
(compiled May 8 2007,13:10:02)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.443
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1804
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.54
_refine_diff_density_min         -0.44
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.1007
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         3048
_refine_ls_number_restraints     8
_refine_ls_R_factor_all          0.1626
_refine_ls_R_factor_gt           0.0330
_refine_ls_shift/su_max          0.000348
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
[weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
Method = Robust Weighting (Prince, 1982)
W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
A~i~ are:
5.58 -7.44 2.26 -0.311 -1.74
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0506
_refine_ls_wR_factor_gt          0.0352
_refine_ls_wR_factor_ref         0.0417
_reflns_limit_h_max              18
_reflns_limit_h_min              0
_reflns_limit_k_max              22
_reflns_limit_k_min              0
_reflns_limit_l_max              31
_reflns_limit_l_min              0
_reflns_number_gt                1859
_reflns_number_total             6892
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_r_factor_ref   0.0493
_oxford_refine_ls_scale          0.9913(15)
_oxford_reflns_number_all        6892
_oxford_reflns_threshold_expression_ref I>1.0\s(I)
_cod_data_source_file            b822619a.txt
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      Pbcb
_cod_original_formula_sum        'C44 H36 B2 Co1 F8 N6'
_cod_database_code               7104402
_montpellier_publication_code    12Co2+
_montpellier_structure_analysis_code vdlee29
_montpellier_compound_description 'PDA-H-Co-BF4 2:1'