Interweaving of single-helical and equal double-helical chains with the same helical axis in a 3D metal‒organic framework
Guo, Huadong; Guo, Xianmin; Wang, Xiao; Li, Guanghua; Guo, Zhiyong; Su, Shengqun; Zhang, Hongjie; CrystEngComm 11 (2009) 1509–; doi:10.1039/b902809a

data_7200999
_publ_section_title
;
 Interweaving of single-helical and equal double-helical chains with
 the same helical axis in a 3D metal--organic framework
;
_journal_issue                   8
_journal_name_full               CrystEngComm
_journal_page_first              1509
_journal_paper_doi               10.1039/b902809a
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C16 H10 N8 O5 Zn2'
_chemical_formula_sum            'C16 H10 N8 O5 Zn2'
_chemical_formula_weight         525.06
_chemical_melting_point          ?
_chemical_name_systematic
;
?
;
_space_group_IT_number           167
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3 2"c'
_symmetry_space_group_name_H-M   'R -3 c :H'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   26.1227(12)
_cell_length_b                   26.1227(12)
_cell_length_c                   13.4564(13)
_cell_measurement_reflns_used    1756
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      26.02
_cell_measurement_theta_min      1.20
_cell_volume                     7952.4(9)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    SHELXP-97
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 9.00cm
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0340
_diffrn_reflns_av_sigmaI/netI    0.0162
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            14440
_diffrn_reflns_theta_full        26.03
_diffrn_reflns_theta_max         26.03
_diffrn_reflns_theta_min         1.56
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  .
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.768
_exptl_absorpt_correction_T_max  0.612
_exptl_absorpt_correction_T_min  0.516
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.973
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4716
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         1.045
_refine_diff_density_min         -0.207
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.112
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         1756
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.0251
_refine_ls_R_factor_gt           0.0227
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0366P)^2^+11.6945P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0626
_refine_ls_wR_factor_ref         0.0637
_reflns_number_gt                1622
_reflns_number_total             1756
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b902809a.txt
_cod_data_source_block           compound6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        7952.3(9)
_cod_original_sg_symbol_H-M      R-3c
_cod_database_code               7200999