New (3,4)-connected intrinsically chiral topology observed in a homochiral coordination polymer from achiral precursors
Wang, Fei; Zhang, Jian; Chen, Shu-Mei; Xie, Yi-Ming; Wu, Xiao-Yuan; Chen, Shan-Ci; Yu, Rong-Min; Lu, Can-Zhong; CrystEngComm 11 (2009) 1526–; doi:10.1039/b907092n

data_7201261
_publ_section_title
;
 New (3,4)-connected intrinsically chiral topology observed in a
 homochiral coordination polymer from achiral precursors
;
_journal_issue                   8
_journal_name_full               CrystEngComm
_journal_page_first              1526
_journal_paper_doi               10.1039/b907092n
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C7 H4 Cu2 N6'
_chemical_formula_sum            'C7 H4 Cu2 N6'
_chemical_formula_weight         299.24
_chemical_name_systematic
;
?
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.535(3)
_cell_length_b                   10.913(7)
_cell_length_c                   17.142(10)
_cell_measurement_reflns_used    2844
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.4662
_cell_measurement_theta_min      2.2124
_cell_volume                     848.4(9)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_data_collection       'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  Saturn724
_diffrn_measurement_method       CCD_Profile_fitting
_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  0.0661
_diffrn_reflns_av_sigmaI/netI    0.0500
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            7255
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    4.979
_exptl_absorpt_correction_T_max  0.7889
_exptl_absorpt_correction_T_min  0.5864
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear, Rigaku, 2005'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    2.343
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.750
_refine_diff_density_min         -1.009
_refine_diff_density_rms         0.224
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(4)
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     148
_refine_ls_number_reflns         1916
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0547
_refine_ls_R_factor_gt           0.0498
_refine_ls_shift/su_max          0.064
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1210P)^2^+0.0794P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1528
_refine_ls_wR_factor_ref         0.1594
_reflns_number_gt                1757
_reflns_number_total             1916
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b907092n.txt
_cod_data_source_block           1
_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.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed
to 'multi-scan' 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_cell_volume        848.5(9)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7201261