Poly[[dibromomercury(II)]-di-μ-pyrazine-κ^4^<i>N:N</i>']
Nockemann, Peter; Meyer, Gerd; Acta Crystallographica Section E 60 (2004) m747–m748; doi:10.1107/S1600536804010438

data_2203718
_publ_section_title
;
 Poly[[dibromomercury(II)]-di-\m-pyrazine-\k^4^<i>N:N</i>']
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m747
_journal_page_last               m748
_journal_paper_doi               10.1107/S1600536804010438
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          '[Hg Br2 (C4 H4 N2)]'
_chemical_formula_moiety         'C8 H8 Br2 Hg N4'
_chemical_formula_sum            'C8 H8 Br2 Hg N4'
_chemical_formula_weight         520.59
_chemical_name_systematic
;
Poly[[dibromomercury(II)]-di-\m-pyrazine-k^4^N:N']
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                   11.5603(10)
_cell_length_b                   8.3073(19)
_cell_length_c                   12.9906(16)
_cell_measurement_reflns_used    12170
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.00
_cell_measurement_theta_min      2.36
_cell_volume                     1247.6(3)
_computing_cell_refinement       'X-STEP32 (Stoe & Cie, 2000)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2001)'
_computing_data_reduction        'X-RED (Stoe & Cie, 2001)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Stoe IPDS-I'
_diffrn_measurement_method       \f
_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  0.0861
_diffrn_reflns_av_sigmaI/netI    0.0427
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            15175
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.36
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    18.717
_exptl_absorpt_correction_T_max  0.5385
_exptl_absorpt_correction_T_min  0.2290
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(X-SHAPE; Stoe & Cie, 1998)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    2.772
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.769
_refine_diff_density_min         -0.576
_refine_ls_extinction_coef       0.00104(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   0.849
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     74
_refine_ls_number_reflns         1316
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.849
_refine_ls_R_factor_all          0.0486
_refine_ls_R_factor_gt           0.0231
_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^)+(0.0115P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0342
_refine_ls_wR_factor_ref         0.0376
_reflns_number_gt                916
_reflns_number_total             1316
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            cf6343.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (11
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (21 time).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (11
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (21 time).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               2203718
_cod_database_fobs_code          2203718