Organic base effects in NHC promoted O- to C-carboxyl transfer; chemoselectivity profiles, mechanistic studies and domino catalysis.
Campbell, Craig D.; Collett, Christopher J.; Thomson, Jennifer E.; Slawin, Alexandra M. Z.; Smith, Andrew D.; Organic & biomolecular chemistry 9 (2011) 4205–4218; doi:10.1039/c1ob05160a

data_7151913
_publ_section_title
;
 Organic base effects in NHC promoted O- to C-carboxyl transfer;
 chemoselectivity profiles, mechanistic studies and domino catalysis.
;
_journal_issue                   11
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4205
_journal_page_last               4218
_journal_paper_doi               10.1039/c1ob05160a
_journal_volume                  9
_journal_year                    2011
_chemical_formula_moiety         'C11 H12 N3,B F4'
_chemical_formula_sum            'C11 H12 B F4 N3'
_chemical_formula_weight         273.05
_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_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.7538(9)
_cell_length_b                   10.5562(15)
_cell_length_c                   17.047(2)
_cell_measurement_reflns_used    4617
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      28.6226
_cell_measurement_theta_min      2.2692
_cell_volume                     1215.4(3)
_computing_cell_refinement       'CrystalClear (Rigaku Corp., 2004)'
_computing_data_collection       'CrystalClear (Rigaku Corp., 2004)'
_computing_data_reduction        'CrystalClear (Rigaku Corp., 2004)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      93(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
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_diffrn_reflns_limit_h_min       -7
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_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7908
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.33
_diffrn_reflns_theta_min         2.27
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8943
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.492
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.1500
_exptl_crystal_size_mid          0.1000
_exptl_crystal_size_min          0.0300
_refine_diff_density_max         0.628
_refine_diff_density_min         -0.252
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.4(10)
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         2196
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0459
_refine_ls_R_factor_gt           0.0439
_refine_ls_shift/su_max          0.046
_refine_ls_shift/su_mean         0.011
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0821P)^2^+0.2594P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1195
_refine_ls_wR_factor_ref         0.1218
_reflns_number_gt                2082
_reflns_number_total             2196
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1ob05160a.txt
_cod_data_source_block           2
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1215.3(3)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7151913