Sterically Demanding, Bioxazoline-Derived N-Heterocyclic Carbene Ligands with Restricted Flexibility for Catalysis
Gereon Altenhoff; Richard Goddard; Christian W. Lehmann; Frank Glorius; Journal of the American Chemical Society 126 (2004) 15195–15201; doi:10.1021/ja045349r

data_4113181
_publ_section_title
;
 Sterically Demanding, Bioxazoline-Derived N-Heterocyclic Carbene Ligands
 with Restricted Flexibility for Catalysis
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15195
_journal_page_last               15201
_journal_paper_doi               10.1021/ja045349r
_journal_volume                  126
_journal_year                    2004
_chemical_compound_source        dichloromethane/pentane
_chemical_formula_moiety         'C11 H17 N2 O2 1+, C F3 O3 S 1-'
_chemical_formula_sum            'C12 H17 F3 N2 O5 S'
_chemical_formula_weight         358.34
_chemical_name_common            IBiox(Me)4.HOTf
_chemical_name_systematic
; 
 4,4,11,11-tetramethyl-6,9-dioxa-1,3-diazatricyclo[6.3.0.0^3,7^]undeca-
 7-ene-2-onium trifluoromethanesulfonate 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 93.873(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.2288(2)
_cell_length_b                   9.9771(2)
_cell_length_c                   17.2853(3)
_cell_measurement_reflns_used    63705
_cell_measurement_temperature    100
_cell_measurement_theta_max      31.0
_cell_measurement_theta_min      2.91
_cell_volume                     1587.94(5)
_computing_cell_refinement       'Denzo / Scalepack (Otwinowski 1997)'
_computing_data_collection       'Collect software (Nonius, 1998)'
_computing_data_reduction        'Denzo / Scalepack (Otwinowski 1997)'
_computing_molecular_graphics    'DIAMOND (Crystal Impact GbR, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'CCD \w-scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         '0.3 mm focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1115
_diffrn_reflns_av_sigmaI/netI    0.0527
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            38655
_diffrn_reflns_theta_full        30.97
_diffrn_reflns_theta_max         30.97
_diffrn_reflns_theta_min         5.15
_diffrn_standards_decay_%        0.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.261
_exptl_absorpt_correction_T_max  0.98422
_exptl_absorpt_correction_T_min  0.96382
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details   'XPREP, Siemens (1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.499
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       plate
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.775
_refine_diff_density_min         -0.846
_refine_diff_density_rms         0.158
_refine_ls_extinction_coef       0.007(4)
_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   0.974
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         5021
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.974
_refine_ls_R_factor_all          0.0893
_refine_ls_R_factor_gt           0.0552
_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^)+(0.1314P)^2^+0.2971P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1599
_refine_ls_wR_factor_ref         0.1878
_reflns_number_gt                3640
_reflns_number_total             5021
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja045349rsi20040812_055233.cif
_cod_data_source_block           IBiox(Me)4.HOTf
_cod_depositor_comments
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The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
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_cod_database_code               4113181