Tuning Molecular Structures Using Weak Noncovalent Interactions: Theoretical Study and Structure oftrans-Bis(2-chloropyridine)dihalocopper(II) andtrans-Bis(3-chloropyridine)dibromocopper(II)
Awwadi, Firas; Willett, Roger D.; Twamley, Brendan; Crystal Growth & Design 11 (2011) 5316–; doi:10.1021/cg200893n

data_4501212
_publ_section_title
;
 Tuning Molecular Structures Using Weak Noncovalent Interactions:
 Theoretical Study and Structure
 oftrans-Bis(2-chloropyridine)dihalocopper(II)
 andtrans-Bis(3-chloropyridine)dibromocopper(II)
;
_journal_issue                   12
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              5316
_journal_paper_doi               10.1021/cg200893n
_journal_volume                  11
_journal_year                    2011
_chemical_formula_moiety         'C10 H8 Cl4 Cu N2'
_chemical_formula_sum            'C10 H8 Cl4 Cu N2'
_chemical_formula_weight         361.52
_chemical_name_common            (2-ClPy)2CuCl2
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                76.876(11)
_cell_angle_beta                 70.044(11)
_cell_angle_gamma                70.532(10)
_cell_formula_units_Z            2
_cell_length_a                   8.4359(12)
_cell_length_b                   8.4865(9)
_cell_length_c                   10.5674(14)
_cell_measurement_reflns_used    32
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      12.45
_cell_measurement_theta_min      4.80
_cell_volume                     664.95(16)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'XP, Bruker SHELXTL v. 5.10'
_computing_publication_material  'XCIF, Bruker SHELXTL v. 5.10'
_computing_structure_refinement  'XL, Bruker SHELXTL v. 5.10'
_computing_structure_solution    'XS, Bruker SHELXTL v. 5.10'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0257
_diffrn_reflns_av_sigmaI/netI    0.0444
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2753
_diffrn_reflns_theta_full        24.69
_diffrn_reflns_theta_max         24.69
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        'no decay was observed'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.422
_exptl_absorpt_correction_T_max  0.8128
_exptl_absorpt_correction_T_min  0.6022
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   'XPREP, Bruker SHELXTL v. 5.10'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.806
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             358
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.405
_refine_diff_density_min         -0.291
_refine_diff_density_rms         0.066
_refine_ls_extinction_coef       0.040(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         2247
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0510
_refine_ls_R_factor_gt           0.0338
_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^)+(0.0338P)^2^+0.1771P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0765
_refine_ls_wR_factor_ref         0.0835
_reflns_number_gt                1785
_reflns_number_total             2247
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg200893n_si_004.cif
_cod_data_source_block           fa218a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'Psi scan'
changed to 'psi-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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        664.95(15)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4501212