Identification of 1,3-dialkylimidazolium salt supramolecular aggregates in solution.
Consorti, Crestina S.; Suarez, Paulo A. Z.; de Souza, Roberto F.; Burrow, Robert A.; Farrar, David H.; Lough, Alan J.; Loh, Watson; da Silva, Luis H. M.; Dupont, Jairton; The journal of physical chemistry. B 109 (2005) 4341–4349; doi:10.1021/jp0452709

data_1506368
_publ_section_title
;
 Identification of 1,3-dialkylimidazolium salt supramolecular aggregates
 in solution.
;
_journal_issue                   10
_journal_name_full               'The journal of physical chemistry. B'
_journal_page_first              4341
_journal_page_last               4349
_journal_paper_doi               10.1021/jp0452709
_journal_volume                  109
_journal_year                    2005
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C19 H21 N2, B F4'
_chemical_formula_sum            'C19 H21 B F4 N2'
_chemical_formula_weight         364.19
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_date             2004-10-08T17:53:44-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.7207(3)
_cell_length_b                   10.8545(2)
_cell_length_c                   15.4841(4)
_cell_measurement_temperature    150(2)
_cell_volume                     1801.85(8)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0
_diffrn_reflns_av_unetI/netI     0.026
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2345
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.63
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  0.9737
_exptl_absorpt_correction_T_min  0.9685
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.343
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.569
_refine_diff_density_min         -0.471
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(13)
_refine_ls_extinction_coef       0.010(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   1.042
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         2345
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.053
_refine_ls_R_factor_gt           0.0464
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0560P)^2^+0.9425P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1166
_refine_ls_wR_factor_ref         0.121
_reflns_number_gt                2109
_reflns_number_total             2345
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp0452709si20041015_040136.cif
_cod_data_source_block           k99280
_cod_database_code               1506368