New coordination motifs of melamine directed by N-H—X (X = Cl or Br) hydrogen bonds.
Zhang, Lei; Zhang, Jian; Li, Zhao-Ji; Cheng, Jian-Kai; Yin, Pei-Xiu; Yao, Yuan-Gen; Inorganic chemistry 46 (2007) 5838–5840; doi:10.1021/ic7005138

data_4339059
_publ_section_title
;
 New coordination motifs of melamine directed by N-H---X (X = Cl or Br)
 hydrogen bonds.
;
_journal_issue                   15
_journal_name_full               'Inorganic chemistry'
_journal_page_first              5838
_journal_page_last               5840
_journal_paper_doi               10.1021/ic7005138
_journal_volume                  46
_journal_year                    2007
_chemical_formula_moiety         'C3 H6 Br2 Cu2 N6 '
_chemical_formula_sum            'C3 H6 Br2 Cu2 N6'
_chemical_formula_weight         413.04
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 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                 99.074(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   3.872(3)
_cell_length_b                   16.647(10)
_cell_length_c                   7.377(5)
_cell_measurement_reflns_used    1223
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.4140
_cell_measurement_theta_min      3.0515
_cell_volume                     469.5(6)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Bruker P4'
_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  0.0249
_diffrn_reflns_av_sigmaI/netI    0.0243
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            3540
_diffrn_reflns_theta_full        27.41
_diffrn_reflns_theta_max         27.4140
_diffrn_reflns_theta_min         3.0515
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  0
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    12.997
_exptl_absorpt_correction_T_max  0.595
_exptl_absorpt_correction_T_min  0.299
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   CrystalClear
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    2.921
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             388
_exptl_crystal_size_max          0.2100
_exptl_crystal_size_mid          0.0800
_exptl_crystal_size_min          0.0400
_refine_diff_density_max         0.982
_refine_diff_density_min         -0.885
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     76
_refine_ls_number_reflns         1098
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0333
_refine_ls_R_factor_gt           0.0284
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0360P)^2^+0.5277P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0661
_refine_ls_wR_factor_ref         0.0683
_reflns_number_gt                963
_reflns_number_total             1098
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic7005138-file003.cif
_cod_data_source_block           a
_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/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/usr/data/users/saulius/automatic-downloads/retrospective/ACS/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_cell_volume        469.6(5)
_cod_original_sg_symbol_H-M      P2(1)/m
_cod_original_formula_sum        'C3 H6 Br2 Cu2 N6 '
_cod_database_code               4339059