From loop-like chain to helix: a result of symmetry breaking triggered by the replacement of coordination water
Zhang, Hong-Tao; Li, Yi-Zhi; Wang, Hua-Qin; Nfor, Emmanuel N.; You, Xiao-Zeng; CrystEngComm 7 (2005) 578–; doi:10.1039/b510446g

data_7238102
_publ_section_title
;
 From loop-like chain to helix: a result of symmetry breaking triggered by
 the replacement of coordination water
;
_journal_issue                   94
_journal_name_full               CrystEngComm
_journal_page_first              578
_journal_paper_doi               10.1039/b510446g
_journal_volume                  7
_journal_year                    2005
_chemical_formula_moiety         'C14 H8 Cd2 N2 O9'
_chemical_formula_sum            'C14 H8 Cd2 N2 O9'
_chemical_formula_weight         573.02
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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                 107.92(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.3600(17)
_cell_length_b                   8.4780(17)
_cell_length_c                   22.484(6)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      12.4
_cell_measurement_theta_min      1.9
_cell_volume                     1516.3(6)
_computing_cell_refinement       'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_data_collection       'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Bruker SHELXTL (Sheldrick, 2000)'
_computing_publication_material  'Bruker SHELXTL (Sheldrick, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Enraf-Nonius CAD4'
_diffrn_measurement_method       '\w scans'
_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  0.0673
_diffrn_reflns_av_sigmaI/netI    0.0334
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            2834
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         1.90
_diffrn_standards_decay_%        1.0
_diffrn_standards_interval_count 200
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.864
_exptl_absorpt_correction_T_max  0.790
_exptl_absorpt_correction_T_min  0.716
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   'XCAD4 (Harms & Wocadlo, 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.510
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1096
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.676
_refine_diff_density_min         -1.039
_refine_diff_density_rms         0.208
_refine_ls_extinction_coef       0.0043(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     247
_refine_ls_number_reflns         2637
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0275
_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^)+(0.0303P)^2^+3.6979P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0652
_refine_ls_wR_factor_ref         0.0681
_reflns_number_gt                2308
_reflns_number_total             2637
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b510446g.txt
_cod_data_source_block           cd1
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/RSC/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7238102