Spontaneous chiral resolution of a coordination polymer with distorted helical structure consisting of achiral building blocks
Siemeling, Ulrich; Scheppelmann, Imke; Neumann, Beate; Stammler, Anja; Stammler, Hans-Georg; Frelek, Jadwiga; Chemical Communications (Cambridge, United Kingdom)  (2003) 2236–2237; doi:10.1039/b307161h

data_7103898
_publ_section_title
;
 Spontaneous chiral resolution of a coordination polymer with distorted
 helical structure consisting of achiral building blocks
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   17
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              2236
_journal_page_last               2237
_journal_paper_doi               10.1039/b307161h
_journal_year                    2003
_chemical_formula_moiety         'C27 H18 Cl2 N2 O Zn + 0.6 CH3CN'
_chemical_formula_sum            'C28.2 H19.8 Cl2 N2.6 O Zn'
_chemical_formula_weight         547.34
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 104.4730(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   27.4530(8)
_cell_length_b                   7.1250(3)
_cell_length_c                   13.0170(5)
_cell_measurement_reflns_used    2374
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      2.910
_cell_volume                     2465.36(16)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'KappaCCD '
_computing_data_reduction
'Denzo and Scalepak (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL-PLUS (1990)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD; rotation images; thick slices'
_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  0.064
_diffrn_reflns_av_sigmaI/netI    0.0534
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12389
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    1.239
_exptl_absorpt_correction_T_max  0.9521
_exptl_absorpt_correction_T_min  0.7075
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.475
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1117
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.490
_refine_diff_density_min         -0.437
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.021(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         4198
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0523
_refine_ls_R_factor_gt           0.0390
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0315P)^2^+3.9266P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0841
_refine_ls_wR_factor_ref         0.0911
_reflns_number_gt                3602
_reflns_number_total             4198
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b307161h.txt
_cod_data_source_block           '[(2)ZnCl2]'
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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      'C 2'
_cod_original_formula_sum        'C28.20 H19.80 Cl2 N2.60 O Zn'
_cod_database_code               7103898