<i>rac</i>-(1<i>R</i>,11<i>R</i>,14<i>S</i>,18<i>R</i>)-Methyl 18-hydroxy-19-oxotricyclo[9.7.1.0^1,14^]nonadecane-11-carboxylate
Fresu, Sonia; Schürmann, Markus; Preut, Hans; Eilbracht, Peter; Acta Crystallographica Section E 60 (2004) o403–o405; doi:10.1107/S1600536804003368

data_2203262
_publ_section_title
;
 <i>rac</i>-(1<i>R</i>,11<i>R</i>,14<i>S</i>,18<i>R</i>)-Methyl
 18-hydroxy-19-oxotricyclo[9.7.1.0^1,14^]nonadecane-11-carboxylate
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o403
_journal_page_last               o405
_journal_paper_doi               10.1107/S1600536804003368
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C21 H34 O4'
_chemical_formula_moiety         'C21 H34 O4'
_chemical_formula_sum            'C21 H34 O4'
_chemical_formula_weight         350.48
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 97.0550(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.5029(9)
_cell_length_b                   11.0460(2)
_cell_length_c                   34.5904(9)
_cell_measurement_reflns_used    31011
_cell_measurement_temperature    291.0(10)
_cell_measurement_theta_max      25.34
_cell_measurement_theta_min      3.01
_cell_volume                     3982.6(4)
_computing_cell_refinement
;
DENZO and SCALEPACK (Otwinowski & Minor, 1997)
;
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction
;
DENZO and SCALEPACK
;
_computing_molecular_graphics    'SHELXTL-Plus (Sheldrick, 1991)'
_computing_publication_material
;
SHELXL97, PARST95 (Nardelli, 1995) and PLATON (Spek, 2001)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      291.0(10)
_diffrn_detector_area_resol_mean '19 vertical, 18 horizontal'
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method
;
496 frames via \w-rotation (\D\w = 1\%) and two times 55 s per frame
(four sets at different \k-angles)
;
_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  0.0440
_diffrn_reflns_av_sigmaI/netI    0.1886
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            31011
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         3.01
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.169
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       block
_exptl_crystal_F_000             1536
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.135
_refine_ls_extinction_coef       0.00321(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   0.907
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     474
_refine_ls_number_reflns         7110
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.907
_refine_ls_R_factor_all          0.1799
_refine_ls_R_factor_gt           0.0428
_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^)+(0.0101P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0612
_refine_ls_wR_factor_ref         0.0713
_reflns_number_gt                2449
_reflns_number_total             7110
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt6404.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2203262
_cod_database_fobs_code          2203262