Stereoselective [4 + 1] Annulation Reactions with Silyl Vinylketenes Derived from Fischer Carbene Complexes
William H. Moser; Laura A. Feltes; Liangdong Sun; Matthew W. Giese; Ryan W. Farrell; Journal of Organic Chemistry 71 (2006) 6542–6546; doi:10.1021/jo060994x

data_4021904
_publ_section_title
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 Stereoselective [4 + 1] Annulation Reactions with Silyl Vinylketenes
 Derived from Fischer Carbene Complexes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6542
_journal_page_last               6546
_journal_paper_doi               10.1021/jo060994x
_journal_volume                  71
_journal_year                    2006
_chemical_formula_moiety         'C26 H34 Cr O5 Si'
_chemical_formula_sum            'C26 H34 Cr O5 Si'
_chemical_formula_weight         506.62
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 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            8
_cell_length_a                   32.4410(10)
_cell_length_b                   15.9505(5)
_cell_length_c                   9.9787(3)
_cell_measurement_reflns_used    9735
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      2.27
_cell_volume                     5163.5(3)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'XP, Bruker'
_computing_publication_material  'XCIF (Bruker, 1999), XTEL (local library)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 44.52
_diffrn_detector_type            'Bruker SMART 6000'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_details
'0.30 degree frames measured for 15 seconds each'
_diffrn_measurement_device       'three-circle goniometer with fixed chi'
_diffrn_measurement_device_type  'Bruker Platform goniometer'
_diffrn_measurement_method       \w-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  0.0489
_diffrn_reflns_av_sigmaI/netI    0.0293
_diffrn_reflns_limit_h_max       42
_diffrn_reflns_limit_h_min       -42
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            77382
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.523
_exptl_absorpt_correction_T_max  0.8937
_exptl_absorpt_correction_T_min  0.8805
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing (1995)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2144
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.339
_refine_diff_density_min         -0.339
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.576(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     610
_refine_ls_number_reflns         11848
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0345
_refine_ls_R_factor_gt           0.0292
_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^)+(0.0382P)^2^+1.2852P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0717
_refine_ls_wR_factor_ref         0.0750
_reflns_number_gt                10868
_reflns_number_total             11848
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo060994xsi20060512_051754.cif
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' tag value 'multi-scans' was replaced
with 'multi-scan' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_database_code               4021904