May halogen bonding interactions compete with Cu⋯Cl semi-coordinate bonds? Structural, magnetic and theoretical studies of two polymorphs of trans-bis(5-bromo-2-chloro pyridine)dichlorocopper(ii) and trans-bis(2,5-dichloropyridine)dichlorocopper(ii)
Awwadi, Firas F.; Turnbull, Mark M.; Alwahsh, Manal I.; Haddad, Salim F.; New Journal of Chemistry 42 (2018) 10642–; doi:10.1039/C8NJ00422F

data_7057228
_publ_section_title
;
 May halogen bonding interactions compete with Cu&#x22EF;Cl
 semi-coordinate bonds? Structural, magnetic and theoretical studies of
 two polymorphs of trans-bis(5-bromo-2-chloro pyridine)dichlorocopper(ii)
 and trans-bis(2,5-dichloropyridine)dichlorocopper(ii)
;
_journal_issue                   13
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              10642
_journal_paper_doi               10.1039/C8NJ00422F
_journal_volume                  42
_journal_year                    2018
_chemical_formula_sum            'C10 H6 Cl6 Cu N2'
_chemical_formula_weight         430.41
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
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CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
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_audit_update_record
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2018-01-20 deposited with the CCDC.
2018-03-29 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 120.219(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
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_cell_length_b                   14.1799(4)
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_cell_measurement_reflns_used    2725
_cell_measurement_temperature    293(2)
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_computing_cell_refinement
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
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_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.0534
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Eos'
_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
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_diffrn_reflns_limit_h_min       -20
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.950
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelpiped
_exptl_crystal_F_000             1688
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.298
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_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
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_refine_ls_number_parameters     172
_refine_ls_number_reflns         2980
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0365
_refine_ls_R_factor_gt           0.0285
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0301P)^2^+1.0748P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0657
_refine_ls_wR_factor_ref         0.0689
_reflns_number_gt                2520
_reflns_number_total             2980
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8nj00422f2.cif
_cod_data_source_block           exp_1407
_cod_depositor_comments
'Adding full bibliography for 7057225--7057228.cif.'
_cod_original_cell_volume        2932.0(2)
_cod_database_code               7057228