Structure and properties of N,N-alkylene bis(N'-alkylimidazolium) salts.
Lee, Minjae; Niu, Zhenbin; Slebodnick, Carla; Gibson, Harry W.; The journal of physical chemistry. B 114 (2010) 7312–7319; doi:10.1021/jp102370j

data_1502686
_publ_section_title
;
 Structure and properties of N,N-alkylene bis(N'-alkylimidazolium) salts.
;
_journal_issue                   21
_journal_name_full               'The journal of physical chemistry. B'
_journal_page_first              7312
_journal_page_last               7319
_journal_paper_doi               10.1021/jp102370j
_journal_volume                  114
_journal_year                    2010
_chemical_formula_moiety         'C10 H16 N4, 2(F6 P)'
_chemical_formula_sum            'C10 H16 F12 N4 P2'
_chemical_formula_weight         482.21
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 122.621(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.186(3)
_cell_length_b                   6.4852(3)
_cell_length_c                   14.4065(13)
_cell_measurement_reflns_used    4408
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      2.85
_cell_volume                     1745.8(4)
_computing_cell_refinement       'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_data_collection       'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_data_reduction        'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_molecular_graphics
'SHELXTL (Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.)'
_computing_publication_material
'SHELXTL (Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.)'
_computing_structure_refinement
'SHELXL-97 (Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.)'
_computing_structure_solution
'SHELXS-97 (Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 CCD
_diffrn_detector_area_resol_mean 10.2265
_diffrn_detector_type            'Oxford Diffraction Atlas CCD'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Oxford Diffraction Gemini'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0300
_diffrn_reflns_av_sigmaI/netI    0.0235
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11193
_diffrn_reflns_theta_full        30.08
_diffrn_reflns_theta_max         30.08
_diffrn_reflns_theta_min         2.85
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_current           40
_diffrn_source_voltage           50
_diffrn_standards_decay_%        <2%
_diffrn_standards_interval_count 50
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.376
_exptl_absorpt_correction_T_max  0.968
_exptl_absorpt_correction_T_min  0.925
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
; 
CrysAlisPro, Oxford Diffraction Ltd., Version 1.171.33.34d
(release 27-02-2009 CrysAlis171 .NET) (compiled Feb 27 2009,15:38:38)
Numerical absorption correction based on gaussian integration over
a multifaceted crystal model
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.835
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.363
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         2562
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0358
_refine_ls_R_factor_gt           0.0288
_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^)+(0.0454P)^2^+0.4122P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0759
_refine_ls_wR_factor_ref         0.0780
_reflns_number_gt                2171
_reflns_number_total             2562
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp102370j_si_002.cif
_cod_data_source_block           cs1311
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Gaussian' changed to
'gaussian' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1745.8(3)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               1502686