Synthesis and reactivity of electron poor allenes: formation of completely organic frustrated Lewis pairs.
Palomas, David; Holle, Sigrid; Inés, Blanca; Bruns, Hans; Goddard, Richard; Alcarazo, Manuel; Dalton transactions (Cambridge, England : 2003) 41 (2012) 9073–9082; doi:10.1039/c2dt30195d

data_7019696
_publ_section_title
;
 Synthesis and reactivity of electron poor allenes: formation of
 completely organic frustrated Lewis pairs.
;
_journal_issue                   30
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9073
_journal_page_last               9082
_journal_paper_doi               10.1039/c2dt30195d
_journal_volume                  41
_journal_year                    2012
_chemical_compound_source        pentane
_chemical_formula_moiety         'C14 H12 F12 N2'
_chemical_formula_sum            'C14 H12 F12 N2'
_chemical_formula_weight         436.26
_chemical_name_systematic
;
2-(1,2,3,4-(tetramethyl)imidazol-3-ium-2-yl)-
1,1,3,3-tetra(trifluoromethyl)-propan-2-ide
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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_block_code                BHC-BB-024-02
_audit_creation_date             2012-01-18
_cell_angle_alpha                90.00
_cell_angle_beta                 111.802(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.0303(8)
_cell_length_b                   8.0790(8)
_cell_length_c                   15.6424(12)
_cell_measurement_reflns_used    36858
_cell_measurement_temperature    100
_cell_measurement_theta_max      33.0996
_cell_measurement_theta_min      2.6488
_cell_volume                     1646.3(2)
_computing_cell_refinement       'DENZO (Bruker AXS, 2006)'
_computing_data_collection       'DATCOL (Bruker AXS, 2006)'
_computing_data_reduction        'DENZO (Bruker AXS, 2006)'
_computing_molecular_graphics    'DIAMOND (Crystal Impact GbR, 2005)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 18.02
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker AXS Enraf-Nonius KappaCCD'
_diffrn_measurement_method       'CCD \f- and \w-scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         '0.2 x 2mm^2^ focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0422
_diffrn_reflns_av_sigmaI/netI    0.0311
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            33671
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         33.23
_diffrn_reflns_theta_min         2.80
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.201
_exptl_absorpt_correction_T_max  0.97398
_exptl_absorpt_correction_T_min  0.95608
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details   'SADABS (Bruker AXS, 2008)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.760
_exptl_crystal_description       block
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.732
_refine_diff_density_min         -0.643
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     257
_refine_ls_number_reflns         6308
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0786
_refine_ls_R_factor_gt           0.0557
_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^)+(0.0927P)^2^+1.0104P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1597
_refine_ls_wR_factor_ref         0.1772
_reflns_number_gt                4676
_reflns_number_total             6308
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt30195d.txt
_cod_data_source_block           6946_17
_cod_original_sg_symbol_Hall     '-p 2yn'
_cod_original_sg_symbol_H-M      'p 21/n'
_cod_database_code               7019696