Ethyl (4a<i>R</i>*,7<i>S</i>*,8<i>S</i>*,8a<i>S</i>*)-1-oxo-7-phenyl-3,4,4a,7,8,8a-hexahydro-1<i>H</i>-isochromene-8-carboxylate
Jiang, Xiu Qing; Wu, Jin-Long; Acta Crystallographica Section E 66 (2010) o1367–; doi:10.1107/S1600536810017009

data_2226339
_publ_section_title
;
 Ethyl
 (4a<i>R</i>*,7<i>S</i>*,8<i>S</i>*,8a<i>S</i>*)-1-oxo-7-phenyl-3,4,4a,7,8,8a-hexahydro-1<i>H</i>-isochromene-8-carboxylate
;
_journal_coeditor_code           XU2757
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1367
_journal_paper_doi               10.1107/S1600536810017009
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C18 H20 O4'
_chemical_formula_moiety         'C18 H20 O4'
_chemical_formula_sum            'C18 H20 O4'
_chemical_formula_weight         300.34
_chemical_name_systematic
;
Ethyl
(4a<i>R</i>*,7<i>S</i>*,8<i>S</i>*,8a<i>S</i>*)-1-oxo-7-phenyl-
3,4,4a,7,8,8a-hexahydro-1<i>H</i>-isochromene-8-carboxylate
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   15.5513(12)
_cell_length_b                   9.9178(7)
_cell_length_c                   21.1542(17)
_cell_measurement_reflns_used    12675
_cell_measurement_temperature    296.0(10)
_cell_measurement_theta_max      27.4
_cell_measurement_theta_min      3.1
_cell_volume                     3262.7(4)
_computing_cell_refinement       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_collection       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 2002)'
_computing_molecular_graphics    'ORTEP-3 for windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296.0(10)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rolling anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0754
_diffrn_reflns_av_sigmaI/netI    0.0431
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            26140
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         3.11
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1280
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.349
_refine_diff_density_min         -0.276
_refine_ls_extinction_coef       0.0067(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         3200
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1259
_refine_ls_R_factor_gt           0.0687
_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^)+(0.0698P)^2^+1.9409P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1673
_refine_ls_wR_factor_ref         0.1971
_reflns_number_gt                1627
_reflns_number_total             3200
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            xu2757.cif
_cod_data_source_block           I
_cod_database_code               2226339
_cod_database_fobs_code          2226339