A derivative of the Corey lactone – crystal structure of (3aR,4S,5R,6aS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl benzoate, C21H30O5Si
Wang, Kun-Yan; Wei, Pengfei; Yang, Xiao-Li; Zeitschrift für Kristallographie - New Crystal Structures 233 (2018) 91–92; doi:10.1515/ncrs-2017-0184

data_8106056
_publ_section_title
;
 A derivative of the Corey lactone -- crystal structure of
 (3aR,4S,5R,6aS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl
 benzoate, C21H30O5Si
;
_journal_issue                   1
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              91
_journal_page_last               92
_journal_paper_doi               10.1515/ncrs-2017-0184
_journal_volume                  233
_journal_year                    2018
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C21 H30 O5 Si'
_chemical_formula_sum            'C21 H30 O5 Si'
_chemical_formula_weight         390.54
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.5017(6)
_cell_length_b                   11.4370(7)
_cell_length_c                   22.2285(12)
_cell_measurement_reflns_used    5171
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      24.35
_cell_measurement_theta_min      2.99
_cell_volume                     2161.4(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXS-97 (Sheldrick, 2008)[6]'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)[6]'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'omega scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0845
_diffrn_reflns_av_unetI/netI     0.0492
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            25865
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.381
_diffrn_reflns_theta_min         2.985
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.136
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6694
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2014)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.200
_exptl_crystal_description       block
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.370
_exptl_crystal_size_min          0.350
_refine_diff_density_max         0.162
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details
;
 Flack x determined using 1010 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.04(6)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         3965
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0802
_refine_ls_R_factor_gt           0.0499
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0373P)^2^+0.4754P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0879
_refine_ls_wR_factor_ref         0.0972
_reflns_Friedel_coverage         0.741
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                2970
_reflns_number_total             3965
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            suppl_ncrs-2017-0184_suppl.cif
_cod_data_source_block           1
_cod_database_code               8106056
_shelx_estimated_absorpt_t_min   0.948
_shelx_estimated_absorpt_t_max   0.954
_shelx_res_checksum              36540
_shelx_hkl_checksum              63066