Supramolecular architectures of symmetrical dicationic ionic liquid based systems
Tadesse, Haregewine; Blake, Alexander J.; Champness, Neil R.; Warren, John E.; Rizkallah, Pierre J.; Licence, Peter; CrystEngComm 14 (2012) 4886–; doi:10.1039/c2ce25106j

data_7208185
_publ_section_title
;
 Supramolecular architectures of symmetrical dicationic ionic liquid based
 systems
;
_journal_issue                   15
_journal_name_full               CrystEngComm
_journal_page_first              4886
_journal_paper_doi               10.1039/c2ce25106j
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C18 H32 N4 2+, 2(Br -)'
_chemical_formula_sum            'C18 H32 Br2 N4'
_chemical_formula_weight         464.30
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'enCIFer eding of SHELXL97 CIF output'
_cell_angle_alpha                90.00
_cell_angle_beta                 95.503(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.3281(7)
_cell_length_b                   12.8100(12)
_cell_length_c                   11.3249(10)
_cell_measurement_reflns_used    3376
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.4
_cell_volume                     1058.20(17)
_computing_cell_refinement       'Bruker SAINT version 6.36a (Bruker, 2002)'
_computing_data_collection       'Bruker SMART version 5.624 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 2001)'
_computing_molecular_graphics    'MERCURY (Bruno et al., 2006)'
_computing_publication_material  'enCIFer(Allen et al.,2004);PLATON(Spek,2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker SMART1000 CCD area detector'
_diffrn_measurement_method       omega
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.013
_diffrn_reflns_av_sigmaI/netI    0.014
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            6672
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.41
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.838
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.72
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Bruker SHELXTL; Bruker, 2001)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.457
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             476
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.56
_refine_diff_density_min         -0.47
_refine_diff_density_rms         0.06
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.06
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     112
_refine_ls_number_reflns         2419
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.06
_refine_ls_R_factor_all          0.0346
_refine_ls_R_factor_gt           0.0290
_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^)+(0.033P)^2^+0.733P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.0717
_reflns_number_gt                2110
_reflns_number_total             2419
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c2ce25106j.txt
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        1058.2(3)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7208185