Highly enantioselective intramolecular Michael reactions by D-camphor-derived triazolium salts.
Li, Yi; Wang, Xue-Qiang; Zheng, Chao; You, Shu-Li; Chemical communications (Cambridge, England)  (2009) 5823–5825; doi:10.1039/b914805a

data_7104918
_publ_section_title
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 Highly enantioselective intramolecular Michael reactions by
 D-camphor-derived triazolium salts.
;
_journal_issue                   39
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              5823
_journal_page_last               5825
_journal_paper_doi               10.1039/b914805a
_journal_year                    2009
_chemical_formula_sum            'C19 H13 F3 O2'
_chemical_formula_weight         330.29
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.334(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.9074(11)
_cell_length_b                   15.5638(19)
_cell_length_c                   24.123(3)
_cell_measurement_reflns_used    2233
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      41.183
_cell_measurement_theta_min      5.088
_cell_volume                     3329.7(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0551
_diffrn_reflns_av_sigmaI/netI    0.0633
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            17167
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         1.56
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7964
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.403
_exptl_crystal_size_mid          0.352
_exptl_crystal_size_min          0.278
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.200
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     433
_refine_ls_number_reflns         6205
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.1676
_refine_ls_R_factor_gt           0.0815
_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^)+(0.0966P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1924
_refine_ls_wR_factor_ref         0.2309
_reflns_number_gt                2884
_reflns_number_total             6205
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b914805a.txt
_cod_data_source_block           cd28459
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7104918