Bridgehead Lithiation-Substitution of Bridged Ketones, Lactones, Lactams, and Imides: Experimental Observations and Computational Insights
Christopher J. Hayes; Nigel S. Simpkins; Douglas T. Kirk; Lee Mitchell; Jerome Baudoux; Alexander J. Blake; Claire Wilson; Journal of the American Chemical Society 131 (2009) 8196–8210; doi:10.1021/ja9009875

data_4104527
_publ_section_title
;
 Bridgehead Lithiation-Substitution of Bridged Ketones, Lactones, Lactams,
 and Imides: Experimental Observations and Computational Insights
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8196
_journal_page_last               8210
_journal_paper_doi               10.1021/ja9009875
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C16 H21 N O2 Si'
_chemical_formula_weight         287.43
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 91.633(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   6.1361(9)
_cell_length_b                   20.097(3)
_cell_length_c                   25.013(4)
_cell_measurement_reflns_used    4975
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.7
_cell_measurement_theta_min      2.6
_cell_volume                     3083.3(8)
_computing_cell_refinement       'Bruker SAINT version 6.02a (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'SHELXL-97; PLATON (Spek, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.915
_diffrn_measurement_device_type  'Bruker SMART1000 CCD area detector'
_diffrn_measurement_method       omega
_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  0.045
_diffrn_reflns_av_sigmaI/netI    0.0600
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            27303
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         28.82
_diffrn_reflns_theta_min         1.63
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    0.154
_exptl_absorpt_correction_T_max  0.962
_exptl_absorpt_correction_T_min  0.722
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1232
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.709
_refine_diff_density_min         -0.329
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.06(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     722
_refine_ls_number_reflns         14151
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0772
_refine_ls_R_factor_gt           0.0607
_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^)+(0.0790P)^2^+1.7790P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1445
_refine_ls_wR_factor_ref         0.1523
_reflns_number_gt                11524
_reflns_number_total             14176
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9009875_si_003.cif
_cod_data_source_block           impecx
_cod_depositor_comments
;
The following automatic conversions were performed:

'_atom_sites_solution_hydrogens' value 'geometrically placed' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_database_code               4104527