3,4-(4-Methoxybenzo):8,9-benzobicyclo[4.4.1]undeca-3,8-dien-11-one ethylene acetal
Liu, Xiaoming; Kilner, Colin A.; Halcrow, Malcolm A.; Acta Crystallographica Section C 58 (2002) o218–o219; doi:10.1107/S0108270102001816

data_2012619
_publ_section_title
;
 3,4-(4-Methoxybenzo):8,9-benzobicyclo[4.4.1]undeca-3,8-dien-11-one
 ethylene acetal
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o218
_journal_page_last               o219
_journal_paper_doi               10.1107/S0108270102001816
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C22 H24 O3'
_chemical_formula_moiety         'C22 H24 O3'
_chemical_formula_sum            'C22 H24 O3'
_chemical_formula_weight         336.41
_chemical_name_common
;
3,4-(4-methoxybenzo):8,9-benzo-bicyclo[4.4.1]undeca-3,9-dien-11-one
ethylene acetal
;
_chemical_name_systematic
;5-methoxyspiro[tetracyclo[8.8.1.0^3,8^.0^12,17^]nonadeca-3,5,7,12,14,16-hexene-
19,2'-[1,3]dioxolane]
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c 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            4
_cell_length_a                   13.3194(3)
_cell_length_b                   7.73110(10)
_cell_length_c                   16.5545(3)
_cell_measurement_reflns_used    24364
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.35
_cell_measurement_theta_min      3.05
_cell_volume                     1704.68(5)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'ORTEX (McArdle, 1995)'
_computing_publication_material  'local program'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       'Please provide'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.069
_diffrn_reflns_av_sigmaI/netI    0.036
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            24364
_diffrn_reflns_theta_full        27.35
_diffrn_reflns_theta_max         27.35
_diffrn_reflns_theta_min         3.05
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.971
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.311
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular prism'
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.20
_refine_diff_density_min         -0.19
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack   'not reliably determined'
_refine_ls_extinction_coef       0.014(3)
_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   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         1989
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0378
_refine_ls_R_factor_gt           0.0338
_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^)+(0.049P)^2^+0.241P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0820
_refine_ls_wR_factor_ref         0.0842
_reflns_number_gt                1841
_reflns_number_total             1989
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bm1488.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               2012619
_cod_database_fobs_code          2012619