Controlled generation of acentric and homochiral coordination compounds from a versatile asymmetric ligand 4-(1H-1,2,4-triazol-3-yl)-4H-1,2,4-triazole.
Zhang, Rui-Bo; Zhang, Jian; Li, Zhao-Ji; Qin, Ye-Yan; Cheng, Jian-Kai; Yao, Yuan-Gen; Chemical communications (Cambridge, England)  (2008) 4159–4161; doi:10.1039/b807320a

data_7103341
_publ_section_title
;
 Controlled generation of acentric and homochiral coordination
 compounds from a versatile asymmetric ligand
 4-(1H-1,2,4-triazol-3-yl)-4H-1,2,4-triazole.
;
_journal_issue                   35
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4159
_journal_page_last               4161
_journal_paper_doi               10.1039/b807320a
_journal_year                    2008
_chemical_formula_sum            'C4 H6 Br2 Cd N6 O'
_chemical_formula_weight         426.37
_chemical_name_systematic
;
?
;
_space_group_IT_number           24
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'I 2b 2c'
_symmetry_space_group_name_H-M   'I 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                   7.512(3)
_cell_length_b                   19.532(8)
_cell_length_c                   7.143(3)
_cell_measurement_reflns_used    1559
_cell_measurement_temperature    293.1500
_cell_measurement_theta_max      27.4025
_cell_measurement_theta_min      3.0360
_cell_volume                     1048.1(7)
_computing_cell_refinement       SAINT
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293.1500
_diffrn_detector_area_resol_mean 14.6306
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'SMART CCD'
_diffrn_measurement_method       dtprofit.ref
_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  0.0282
_diffrn_reflns_av_sigmaI/netI    0.0319
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            712
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  .
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    9.686
_exptl_absorpt_correction_T_max  0.380
_exptl_absorpt_correction_T_min  0.166
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.702
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.2000
_exptl_crystal_size_mid          0.2000
_exptl_crystal_size_min          0.1000
_refine_diff_density_max         0.614
_refine_diff_density_min         -0.625
_refine_diff_density_rms         0.105
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.014(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.920
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     74
_refine_ls_number_reflns         1202
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.919
_refine_ls_R_factor_all          0.0205
_refine_ls_R_factor_gt           0.0182
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0174P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0380
_refine_ls_wR_factor_ref         0.0385
_reflns_number_gt                1089
_reflns_number_total             1202
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b807320a.txt
_cod_data_source_block           b
_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_sg_symbol_H-M      I212121
_cod_database_code               7103341