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_4113176
_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/hexane/diethylether
_chemical_formula_moiety         'C21 H33 N2 O2 1+, C F3 O3 S 1-'
_chemical_formula_sum            'C22 H33 F3 N2 O5 S'
_chemical_formula_weight         494.56
_chemical_name_common            IBiox8.HOTf
_chemical_name_systematic
; 
 Dispiro(cyclooctanane-1,3'-(1,3)oxazolo(3',2':3,4)imidazolo(5,1-b)(1,3)
 oxazole-7',1"-cyclooctane) trifluoromethylsulfonate 
;
_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                 96.415(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.5042(1)
_cell_length_b                   21.4698(3)
_cell_length_c                   10.3191(1)
_cell_measurement_reflns_used    53506
_cell_measurement_temperature    100
_cell_measurement_theta_max      31.0
_cell_measurement_theta_min      2.91
_cell_volume                     2312.62(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 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0652
_diffrn_reflns_av_sigmaI/netI    0.0289
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            59432
_diffrn_reflns_theta_full        31.00
_diffrn_reflns_theta_max         31.00
_diffrn_reflns_theta_min         6.83
_diffrn_standards_decay_%        0.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.201
_exptl_absorpt_correction_T_max  0.98993
_exptl_absorpt_correction_T_min  0.97790
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details   'XPREP, Siemens (1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.420
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       prism
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.711
_refine_diff_density_min         -0.646
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.979
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         7272
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.979
_refine_ls_R_factor_all          0.0567
_refine_ls_R_factor_gt           0.0448
_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^)+(0.0811P)^2^+1.0998P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1232
_refine_ls_wR_factor_ref         0.1333
_reflns_number_gt                6012
_reflns_number_total             7272
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja045349rsi20040802_024110.cif
_cod_data_source_block           IBiox8.HOTf
_cod_depositor_comments
;
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 
;
_cod_database_code               4113176