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_7113868
_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 Br2 Hg N2 O + CH3CN'
_chemical_formula_sum            'C29 H21 Br2 Hg N3 O'
_chemical_formula_weight         787.90
_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                 104.891(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   27.7870(13)
_cell_length_b                   7.3490(3)
_cell_length_c                   13.3830(7)
_cell_measurement_temperature    140(2)
_cell_volume                     2641.1(2)
_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      140(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  KappaCCD
_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  0.0672
_diffrn_reflns_av_sigmaI/netI    0.0317
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_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            26541
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         3.04
_exptl_absorpt_coefficient_mu    8.881
_exptl_absorpt_correction_T_max  0.5368
_exptl_absorpt_correction_T_min  0.2454
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
?
;
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.981
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             1496
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         2.463
_refine_diff_density_min         -1.689
_refine_diff_density_rms         0.157
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.031(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     312
_refine_ls_number_reflns         4631
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0408
_refine_ls_R_factor_gt           0.0390
_refine_ls_shift/su_max          0.042
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0430P)^2^+40.2040P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0947
_refine_ls_wR_factor_ref         0.0958
_reflns_number_gt                4503
_reflns_number_total             4631
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7103899
_cod_data_source_file            b307161h.txt
_cod_data_source_block           '[(2)HgBr2]'
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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      'C 2'
_cod_database_code               7113868